diff --git a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/AudioConfig.java b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/AudioConfig.java
index ff27b81d..3d06458c 100644
--- a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/AudioConfig.java
+++ b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/AudioConfig.java
@@ -161,6 +161,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * @return The enum numeric value on the wire for audioEncoding.
    */
+  @java.lang.Override
   public int getAudioEncodingValue() {
     return audioEncoding_;
   }
@@ -177,6 +178,7 @@ public int getAudioEncodingValue() {
    *
    * @return The audioEncoding.
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1.AudioEncoding getAudioEncoding() {
     @SuppressWarnings("deprecation")
     com.google.cloud.texttospeech.v1.AudioEncoding result =
@@ -202,6 +204,7 @@ public com.google.cloud.texttospeech.v1.AudioEncoding getAudioEncoding() {
    *
    * @return The speakingRate.
    */
+  @java.lang.Override
   public double getSpeakingRate() {
     return speakingRate_;
   }
@@ -223,6 +226,7 @@ public double getSpeakingRate() {
    *
    * @return The pitch.
    */
+  @java.lang.Override
   public double getPitch() {
     return pitch_;
   }
@@ -249,6 +253,7 @@ public double getPitch() {
    *
    * @return The volumeGainDb.
    */
+  @java.lang.Override
   public double getVolumeGainDb() {
     return volumeGainDb_;
   }
@@ -272,6 +277,7 @@ public double getVolumeGainDb() {
    *
    * @return The sampleRateHertz.
    */
+  @java.lang.Override
   public int getSampleRateHertz() {
     return sampleRateHertz_;
   }
@@ -803,6 +809,7 @@ public Builder mergeFrom(
      *
      * @return The enum numeric value on the wire for audioEncoding.
      */
+    @java.lang.Override
     public int getAudioEncodingValue() {
       return audioEncoding_;
     }
@@ -821,6 +828,7 @@ public int getAudioEncodingValue() {
      * @return This builder for chaining.
      */
     public Builder setAudioEncodingValue(int value) {
+
       audioEncoding_ = value;
       onChanged();
       return this;
@@ -838,6 +846,7 @@ public Builder setAudioEncodingValue(int value) {
      *
      * @return The audioEncoding.
      */
+    @java.lang.Override
     public com.google.cloud.texttospeech.v1.AudioEncoding getAudioEncoding() {
       @SuppressWarnings("deprecation")
       com.google.cloud.texttospeech.v1.AudioEncoding result =
@@ -904,6 +913,7 @@ public Builder clearAudioEncoding() {
      *
      * @return The speakingRate.
      */
+    @java.lang.Override
     public double getSpeakingRate() {
       return speakingRate_;
     }
@@ -969,6 +979,7 @@ public Builder clearSpeakingRate() {
      *
      * @return The pitch.
      */
+    @java.lang.Override
     public double getPitch() {
       return pitch_;
     }
@@ -1037,6 +1048,7 @@ public Builder clearPitch() {
      *
      * @return The volumeGainDb.
      */
+    @java.lang.Override
     public double getVolumeGainDb() {
       return volumeGainDb_;
     }
@@ -1112,6 +1124,7 @@ public Builder clearVolumeGainDb() {
      *
      * @return The sampleRateHertz.
      */
+    @java.lang.Override
     public int getSampleRateHertz() {
       return sampleRateHertz_;
     }
diff --git a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/AudioEncoding.java b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/AudioEncoding.java
index eb4a67ab..11f1f7a4 100644
--- a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/AudioEncoding.java
+++ b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/AudioEncoding.java
@@ -170,6 +170,10 @@ public AudioEncoding findValueByNumber(int number) {
       };
 
   public final com.google.protobuf.Descriptors.EnumValueDescriptor getValueDescriptor() {
+    if (this == UNRECOGNIZED) {
+      throw new java.lang.IllegalStateException(
+          "Can't get the descriptor of an unrecognized enum value.");
+    }
     return getDescriptor().getValues().get(ordinal());
   }
 
diff --git a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/ListVoicesRequest.java b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/ListVoicesRequest.java
index c89e0f2c..bd0d10d2 100644
--- a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/ListVoicesRequest.java
+++ b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/ListVoicesRequest.java
@@ -131,6 +131,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * @return The languageCode.
    */
+  @java.lang.Override
   public java.lang.String getLanguageCode() {
     java.lang.Object ref = languageCode_;
     if (ref instanceof java.lang.String) {
@@ -160,6 +161,7 @@ public java.lang.String getLanguageCode() {
    *
    * @return The bytes for languageCode.
    */
+  @java.lang.Override
   public com.google.protobuf.ByteString getLanguageCodeBytes() {
     java.lang.Object ref = languageCode_;
     if (ref instanceof java.lang.String) {
diff --git a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/ListVoicesResponse.java b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/ListVoicesResponse.java
index b630cdb5..17e86d99 100644
--- a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/ListVoicesResponse.java
+++ b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/ListVoicesResponse.java
@@ -130,6 +130,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * <code>repeated .google.cloud.texttospeech.v1.Voice voices = 1;</code>
    */
+  @java.lang.Override
   public java.util.List<com.google.cloud.texttospeech.v1.Voice> getVoicesList() {
     return voices_;
   }
@@ -142,6 +143,7 @@ public java.util.List<com.google.cloud.texttospeech.v1.Voice> getVoicesList() {
    *
    * <code>repeated .google.cloud.texttospeech.v1.Voice voices = 1;</code>
    */
+  @java.lang.Override
   public java.util.List<? extends com.google.cloud.texttospeech.v1.VoiceOrBuilder>
       getVoicesOrBuilderList() {
     return voices_;
@@ -155,6 +157,7 @@ public java.util.List<com.google.cloud.texttospeech.v1.Voice> getVoicesList() {
    *
    * <code>repeated .google.cloud.texttospeech.v1.Voice voices = 1;</code>
    */
+  @java.lang.Override
   public int getVoicesCount() {
     return voices_.size();
   }
@@ -167,6 +170,7 @@ public int getVoicesCount() {
    *
    * <code>repeated .google.cloud.texttospeech.v1.Voice voices = 1;</code>
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1.Voice getVoices(int index) {
     return voices_.get(index);
   }
@@ -179,6 +183,7 @@ public com.google.cloud.texttospeech.v1.Voice getVoices(int index) {
    *
    * <code>repeated .google.cloud.texttospeech.v1.Voice voices = 1;</code>
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1.VoiceOrBuilder getVoicesOrBuilder(int index) {
     return voices_.get(index);
   }
diff --git a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SsmlVoiceGender.java b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SsmlVoiceGender.java
index 2552c231..1ba3b87a 100644
--- a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SsmlVoiceGender.java
+++ b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SsmlVoiceGender.java
@@ -170,6 +170,10 @@ public SsmlVoiceGender findValueByNumber(int number) {
       };
 
   public final com.google.protobuf.Descriptors.EnumValueDescriptor getValueDescriptor() {
+    if (this == UNRECOGNIZED) {
+      throw new java.lang.IllegalStateException(
+          "Can't get the descriptor of an unrecognized enum value.");
+    }
     return getDescriptor().getValues().get(ordinal());
   }
 
diff --git a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesisInput.java b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesisInput.java
index d0b893b7..327249f7 100644
--- a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesisInput.java
+++ b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesisInput.java
@@ -230,7 +230,7 @@ public com.google.protobuf.ByteString getTextBytes() {
    * The SSML document to be synthesized. The SSML document must be valid
    * and well-formed. Otherwise the RPC will fail and return
    * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-   * [SSML](/speech/text-to-speech/docs/ssml).
+   * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
    * </pre>
    *
    * <code>string ssml = 2;</code>
@@ -260,7 +260,7 @@ public java.lang.String getSsml() {
    * The SSML document to be synthesized. The SSML document must be valid
    * and well-formed. Otherwise the RPC will fail and return
    * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-   * [SSML](/speech/text-to-speech/docs/ssml).
+   * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
    * </pre>
    *
    * <code>string ssml = 2;</code>
@@ -677,6 +677,7 @@ public Builder clearInputSource() {
      *
      * @return The text.
      */
+    @java.lang.Override
     public java.lang.String getText() {
       java.lang.Object ref = "";
       if (inputSourceCase_ == 1) {
@@ -704,6 +705,7 @@ public java.lang.String getText() {
      *
      * @return The bytes for text.
      */
+    @java.lang.Override
     public com.google.protobuf.ByteString getTextBytes() {
       java.lang.Object ref = "";
       if (inputSourceCase_ == 1) {
@@ -790,13 +792,14 @@ public Builder setTextBytes(com.google.protobuf.ByteString value) {
      * The SSML document to be synthesized. The SSML document must be valid
      * and well-formed. Otherwise the RPC will fail and return
      * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-     * [SSML](/speech/text-to-speech/docs/ssml).
+     * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
      * </pre>
      *
      * <code>string ssml = 2;</code>
      *
      * @return The ssml.
      */
+    @java.lang.Override
     public java.lang.String getSsml() {
       java.lang.Object ref = "";
       if (inputSourceCase_ == 2) {
@@ -820,13 +823,14 @@ public java.lang.String getSsml() {
      * The SSML document to be synthesized. The SSML document must be valid
      * and well-formed. Otherwise the RPC will fail and return
      * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-     * [SSML](/speech/text-to-speech/docs/ssml).
+     * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
      * </pre>
      *
      * <code>string ssml = 2;</code>
      *
      * @return The bytes for ssml.
      */
+    @java.lang.Override
     public com.google.protobuf.ByteString getSsmlBytes() {
       java.lang.Object ref = "";
       if (inputSourceCase_ == 2) {
@@ -850,7 +854,7 @@ public com.google.protobuf.ByteString getSsmlBytes() {
      * The SSML document to be synthesized. The SSML document must be valid
      * and well-formed. Otherwise the RPC will fail and return
      * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-     * [SSML](/speech/text-to-speech/docs/ssml).
+     * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
      * </pre>
      *
      * <code>string ssml = 2;</code>
@@ -874,7 +878,7 @@ public Builder setSsml(java.lang.String value) {
      * The SSML document to be synthesized. The SSML document must be valid
      * and well-formed. Otherwise the RPC will fail and return
      * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-     * [SSML](/speech/text-to-speech/docs/ssml).
+     * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
      * </pre>
      *
      * <code>string ssml = 2;</code>
@@ -896,7 +900,7 @@ public Builder clearSsml() {
      * The SSML document to be synthesized. The SSML document must be valid
      * and well-formed. Otherwise the RPC will fail and return
      * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-     * [SSML](/speech/text-to-speech/docs/ssml).
+     * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
      * </pre>
      *
      * <code>string ssml = 2;</code>
diff --git a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesisInputOrBuilder.java b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesisInputOrBuilder.java
index 1680a445..169d1cb5 100644
--- a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesisInputOrBuilder.java
+++ b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesisInputOrBuilder.java
@@ -55,7 +55,7 @@ public interface SynthesisInputOrBuilder
    * The SSML document to be synthesized. The SSML document must be valid
    * and well-formed. Otherwise the RPC will fail and return
    * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-   * [SSML](/speech/text-to-speech/docs/ssml).
+   * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
    * </pre>
    *
    * <code>string ssml = 2;</code>
@@ -70,7 +70,7 @@ public interface SynthesisInputOrBuilder
    * The SSML document to be synthesized. The SSML document must be valid
    * and well-formed. Otherwise the RPC will fail and return
    * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-   * [SSML](/speech/text-to-speech/docs/ssml).
+   * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
    * </pre>
    *
    * <code>string ssml = 2;</code>
diff --git a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeSpeechRequest.java b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeSpeechRequest.java
index d9dc3a9c..720752a0 100644
--- a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeSpeechRequest.java
+++ b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeSpeechRequest.java
@@ -166,6 +166,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * @return Whether the input field is set.
    */
+  @java.lang.Override
   public boolean hasInput() {
     return input_ != null;
   }
@@ -182,6 +183,7 @@ public boolean hasInput() {
    *
    * @return The input.
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1.SynthesisInput getInput() {
     return input_ == null
         ? com.google.cloud.texttospeech.v1.SynthesisInput.getDefaultInstance()
@@ -198,6 +200,7 @@ public com.google.cloud.texttospeech.v1.SynthesisInput getInput() {
    * .google.cloud.texttospeech.v1.SynthesisInput input = 1 [(.google.api.field_behavior) = REQUIRED];
    * </code>
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1.SynthesisInputOrBuilder getInputOrBuilder() {
     return getInput();
   }
@@ -217,6 +220,7 @@ public com.google.cloud.texttospeech.v1.SynthesisInputOrBuilder getInputOrBuilde
    *
    * @return Whether the voice field is set.
    */
+  @java.lang.Override
   public boolean hasVoice() {
     return voice_ != null;
   }
@@ -233,6 +237,7 @@ public boolean hasVoice() {
    *
    * @return The voice.
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1.VoiceSelectionParams getVoice() {
     return voice_ == null
         ? com.google.cloud.texttospeech.v1.VoiceSelectionParams.getDefaultInstance()
@@ -249,6 +254,7 @@ public com.google.cloud.texttospeech.v1.VoiceSelectionParams getVoice() {
    * .google.cloud.texttospeech.v1.VoiceSelectionParams voice = 2 [(.google.api.field_behavior) = REQUIRED];
    * </code>
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1.VoiceSelectionParamsOrBuilder getVoiceOrBuilder() {
     return getVoice();
   }
@@ -268,6 +274,7 @@ public com.google.cloud.texttospeech.v1.VoiceSelectionParamsOrBuilder getVoiceOr
    *
    * @return Whether the audioConfig field is set.
    */
+  @java.lang.Override
   public boolean hasAudioConfig() {
     return audioConfig_ != null;
   }
@@ -284,6 +291,7 @@ public boolean hasAudioConfig() {
    *
    * @return The audioConfig.
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1.AudioConfig getAudioConfig() {
     return audioConfig_ == null
         ? com.google.cloud.texttospeech.v1.AudioConfig.getDefaultInstance()
@@ -300,6 +308,7 @@ public com.google.cloud.texttospeech.v1.AudioConfig getAudioConfig() {
    * .google.cloud.texttospeech.v1.AudioConfig audio_config = 3 [(.google.api.field_behavior) = REQUIRED];
    * </code>
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1.AudioConfigOrBuilder getAudioConfigOrBuilder() {
     return getAudioConfig();
   }
diff --git a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeSpeechResponse.java b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeSpeechResponse.java
index e4d3b6bd..a64b8c9e 100644
--- a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeSpeechResponse.java
+++ b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeSpeechResponse.java
@@ -126,6 +126,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * @return The audioContent.
    */
+  @java.lang.Override
   public com.google.protobuf.ByteString getAudioContent() {
     return audioContent_;
   }
@@ -464,6 +465,7 @@ public Builder mergeFrom(
      *
      * @return The audioContent.
      */
+    @java.lang.Override
     public com.google.protobuf.ByteString getAudioContent() {
       return audioContent_;
     }
diff --git a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/Voice.java b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/Voice.java
index 0107b98f..675b411e 100644
--- a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/Voice.java
+++ b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/Voice.java
@@ -221,6 +221,7 @@ public com.google.protobuf.ByteString getLanguageCodesBytes(int index) {
    *
    * @return The name.
    */
+  @java.lang.Override
   public java.lang.String getName() {
     java.lang.Object ref = name_;
     if (ref instanceof java.lang.String) {
@@ -243,6 +244,7 @@ public java.lang.String getName() {
    *
    * @return The bytes for name.
    */
+  @java.lang.Override
   public com.google.protobuf.ByteString getNameBytes() {
     java.lang.Object ref = name_;
     if (ref instanceof java.lang.String) {
@@ -268,6 +270,7 @@ public com.google.protobuf.ByteString getNameBytes() {
    *
    * @return The enum numeric value on the wire for ssmlGender.
    */
+  @java.lang.Override
   public int getSsmlGenderValue() {
     return ssmlGender_;
   }
@@ -282,6 +285,7 @@ public int getSsmlGenderValue() {
    *
    * @return The ssmlGender.
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1.SsmlVoiceGender getSsmlGender() {
     @SuppressWarnings("deprecation")
     com.google.cloud.texttospeech.v1.SsmlVoiceGender result =
@@ -302,6 +306,7 @@ public com.google.cloud.texttospeech.v1.SsmlVoiceGender getSsmlGender() {
    *
    * @return The naturalSampleRateHertz.
    */
+  @java.lang.Override
   public int getNaturalSampleRateHertz() {
     return naturalSampleRateHertz_;
   }
@@ -995,6 +1000,7 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
      *
      * @return The enum numeric value on the wire for ssmlGender.
      */
+    @java.lang.Override
     public int getSsmlGenderValue() {
       return ssmlGender_;
     }
@@ -1011,6 +1017,7 @@ public int getSsmlGenderValue() {
      * @return This builder for chaining.
      */
     public Builder setSsmlGenderValue(int value) {
+
       ssmlGender_ = value;
       onChanged();
       return this;
@@ -1026,6 +1033,7 @@ public Builder setSsmlGenderValue(int value) {
      *
      * @return The ssmlGender.
      */
+    @java.lang.Override
     public com.google.cloud.texttospeech.v1.SsmlVoiceGender getSsmlGender() {
       @SuppressWarnings("deprecation")
       com.google.cloud.texttospeech.v1.SsmlVoiceGender result =
@@ -1085,6 +1093,7 @@ public Builder clearSsmlGender() {
      *
      * @return The naturalSampleRateHertz.
      */
+    @java.lang.Override
     public int getNaturalSampleRateHertz() {
       return naturalSampleRateHertz_;
     }
diff --git a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/VoiceSelectionParams.java b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/VoiceSelectionParams.java
index 55c76685..05c580be 100644
--- a/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/VoiceSelectionParams.java
+++ b/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/VoiceSelectionParams.java
@@ -150,6 +150,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * @return The languageCode.
    */
+  @java.lang.Override
   public java.lang.String getLanguageCode() {
     java.lang.Object ref = languageCode_;
     if (ref instanceof java.lang.String) {
@@ -182,6 +183,7 @@ public java.lang.String getLanguageCode() {
    *
    * @return The bytes for languageCode.
    */
+  @java.lang.Override
   public com.google.protobuf.ByteString getLanguageCodeBytes() {
     java.lang.Object ref = languageCode_;
     if (ref instanceof java.lang.String) {
@@ -208,6 +210,7 @@ public com.google.protobuf.ByteString getLanguageCodeBytes() {
    *
    * @return The name.
    */
+  @java.lang.Override
   public java.lang.String getName() {
     java.lang.Object ref = name_;
     if (ref instanceof java.lang.String) {
@@ -231,6 +234,7 @@ public java.lang.String getName() {
    *
    * @return The bytes for name.
    */
+  @java.lang.Override
   public com.google.protobuf.ByteString getNameBytes() {
     java.lang.Object ref = name_;
     if (ref instanceof java.lang.String) {
@@ -260,6 +264,7 @@ public com.google.protobuf.ByteString getNameBytes() {
    *
    * @return The enum numeric value on the wire for ssmlGender.
    */
+  @java.lang.Override
   public int getSsmlGenderValue() {
     return ssmlGender_;
   }
@@ -278,6 +283,7 @@ public int getSsmlGenderValue() {
    *
    * @return The ssmlGender.
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1.SsmlVoiceGender getSsmlGender() {
     @SuppressWarnings("deprecation")
     com.google.cloud.texttospeech.v1.SsmlVoiceGender result =
@@ -922,6 +928,7 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
      *
      * @return The enum numeric value on the wire for ssmlGender.
      */
+    @java.lang.Override
     public int getSsmlGenderValue() {
       return ssmlGender_;
     }
@@ -942,6 +949,7 @@ public int getSsmlGenderValue() {
      * @return This builder for chaining.
      */
     public Builder setSsmlGenderValue(int value) {
+
       ssmlGender_ = value;
       onChanged();
       return this;
@@ -961,6 +969,7 @@ public Builder setSsmlGenderValue(int value) {
      *
      * @return The ssmlGender.
      */
+    @java.lang.Override
     public com.google.cloud.texttospeech.v1.SsmlVoiceGender getSsmlGender() {
       @SuppressWarnings("deprecation")
       com.google.cloud.texttospeech.v1.SsmlVoiceGender result =
diff --git a/proto-google-cloud-texttospeech-v1/src/main/proto/google/cloud/texttospeech/v1/cloud_tts.proto b/proto-google-cloud-texttospeech-v1/src/main/proto/google/cloud/texttospeech/v1/cloud_tts.proto
index 6134ef64..208964f8 100644
--- a/proto-google-cloud-texttospeech-v1/src/main/proto/google/cloud/texttospeech/v1/cloud_tts.proto
+++ b/proto-google-cloud-texttospeech-v1/src/main/proto/google/cloud/texttospeech/v1/cloud_tts.proto
@@ -155,7 +155,7 @@ message SynthesisInput {
     // The SSML document to be synthesized. The SSML document must be valid
     // and well-formed. Otherwise the RPC will fail and return
     // [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-    // [SSML](/speech/text-to-speech/docs/ssml).
+    // [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
     string ssml = 2;
   }
 }
diff --git a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/AudioConfig.java b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/AudioConfig.java
index 00588af5..3d057718 100644
--- a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/AudioConfig.java
+++ b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/AudioConfig.java
@@ -161,6 +161,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * @return The enum numeric value on the wire for audioEncoding.
    */
+  @java.lang.Override
   public int getAudioEncodingValue() {
     return audioEncoding_;
   }
@@ -177,6 +178,7 @@ public int getAudioEncodingValue() {
    *
    * @return The audioEncoding.
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1beta1.AudioEncoding getAudioEncoding() {
     @SuppressWarnings("deprecation")
     com.google.cloud.texttospeech.v1beta1.AudioEncoding result =
@@ -204,6 +206,7 @@ public com.google.cloud.texttospeech.v1beta1.AudioEncoding getAudioEncoding() {
    *
    * @return The speakingRate.
    */
+  @java.lang.Override
   public double getSpeakingRate() {
     return speakingRate_;
   }
@@ -225,6 +228,7 @@ public double getSpeakingRate() {
    *
    * @return The pitch.
    */
+  @java.lang.Override
   public double getPitch() {
     return pitch_;
   }
@@ -251,6 +255,7 @@ public double getPitch() {
    *
    * @return The volumeGainDb.
    */
+  @java.lang.Override
   public double getVolumeGainDb() {
     return volumeGainDb_;
   }
@@ -274,6 +279,7 @@ public double getVolumeGainDb() {
    *
    * @return The sampleRateHertz.
    */
+  @java.lang.Override
   public int getSampleRateHertz() {
     return sampleRateHertz_;
   }
@@ -809,6 +815,7 @@ public Builder mergeFrom(
      *
      * @return The enum numeric value on the wire for audioEncoding.
      */
+    @java.lang.Override
     public int getAudioEncodingValue() {
       return audioEncoding_;
     }
@@ -827,6 +834,7 @@ public int getAudioEncodingValue() {
      * @return This builder for chaining.
      */
     public Builder setAudioEncodingValue(int value) {
+
       audioEncoding_ = value;
       onChanged();
       return this;
@@ -844,6 +852,7 @@ public Builder setAudioEncodingValue(int value) {
      *
      * @return The audioEncoding.
      */
+    @java.lang.Override
     public com.google.cloud.texttospeech.v1beta1.AudioEncoding getAudioEncoding() {
       @SuppressWarnings("deprecation")
       com.google.cloud.texttospeech.v1beta1.AudioEncoding result =
@@ -912,6 +921,7 @@ public Builder clearAudioEncoding() {
      *
      * @return The speakingRate.
      */
+    @java.lang.Override
     public double getSpeakingRate() {
       return speakingRate_;
     }
@@ -977,6 +987,7 @@ public Builder clearSpeakingRate() {
      *
      * @return The pitch.
      */
+    @java.lang.Override
     public double getPitch() {
       return pitch_;
     }
@@ -1045,6 +1056,7 @@ public Builder clearPitch() {
      *
      * @return The volumeGainDb.
      */
+    @java.lang.Override
     public double getVolumeGainDb() {
       return volumeGainDb_;
     }
@@ -1120,6 +1132,7 @@ public Builder clearVolumeGainDb() {
      *
      * @return The sampleRateHertz.
      */
+    @java.lang.Override
     public int getSampleRateHertz() {
       return sampleRateHertz_;
     }
diff --git a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/AudioEncoding.java b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/AudioEncoding.java
index e6e6ffa1..97b55111 100644
--- a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/AudioEncoding.java
+++ b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/AudioEncoding.java
@@ -170,6 +170,10 @@ public AudioEncoding findValueByNumber(int number) {
       };
 
   public final com.google.protobuf.Descriptors.EnumValueDescriptor getValueDescriptor() {
+    if (this == UNRECOGNIZED) {
+      throw new java.lang.IllegalStateException(
+          "Can't get the descriptor of an unrecognized enum value.");
+    }
     return getDescriptor().getValues().get(ordinal());
   }
 
diff --git a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/ListVoicesRequest.java b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/ListVoicesRequest.java
index 75c1b16c..96d4b985 100644
--- a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/ListVoicesRequest.java
+++ b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/ListVoicesRequest.java
@@ -131,6 +131,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * @return The languageCode.
    */
+  @java.lang.Override
   public java.lang.String getLanguageCode() {
     java.lang.Object ref = languageCode_;
     if (ref instanceof java.lang.String) {
@@ -160,6 +161,7 @@ public java.lang.String getLanguageCode() {
    *
    * @return The bytes for languageCode.
    */
+  @java.lang.Override
   public com.google.protobuf.ByteString getLanguageCodeBytes() {
     java.lang.Object ref = languageCode_;
     if (ref instanceof java.lang.String) {
diff --git a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/ListVoicesResponse.java b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/ListVoicesResponse.java
index 89cd4a75..6860e3bb 100644
--- a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/ListVoicesResponse.java
+++ b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/ListVoicesResponse.java
@@ -130,6 +130,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * <code>repeated .google.cloud.texttospeech.v1beta1.Voice voices = 1;</code>
    */
+  @java.lang.Override
   public java.util.List<com.google.cloud.texttospeech.v1beta1.Voice> getVoicesList() {
     return voices_;
   }
@@ -142,6 +143,7 @@ public java.util.List<com.google.cloud.texttospeech.v1beta1.Voice> getVoicesList
    *
    * <code>repeated .google.cloud.texttospeech.v1beta1.Voice voices = 1;</code>
    */
+  @java.lang.Override
   public java.util.List<? extends com.google.cloud.texttospeech.v1beta1.VoiceOrBuilder>
       getVoicesOrBuilderList() {
     return voices_;
@@ -155,6 +157,7 @@ public java.util.List<com.google.cloud.texttospeech.v1beta1.Voice> getVoicesList
    *
    * <code>repeated .google.cloud.texttospeech.v1beta1.Voice voices = 1;</code>
    */
+  @java.lang.Override
   public int getVoicesCount() {
     return voices_.size();
   }
@@ -167,6 +170,7 @@ public int getVoicesCount() {
    *
    * <code>repeated .google.cloud.texttospeech.v1beta1.Voice voices = 1;</code>
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1beta1.Voice getVoices(int index) {
     return voices_.get(index);
   }
@@ -179,6 +183,7 @@ public com.google.cloud.texttospeech.v1beta1.Voice getVoices(int index) {
    *
    * <code>repeated .google.cloud.texttospeech.v1beta1.Voice voices = 1;</code>
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1beta1.VoiceOrBuilder getVoicesOrBuilder(int index) {
     return voices_.get(index);
   }
diff --git a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SsmlVoiceGender.java b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SsmlVoiceGender.java
index d2e41af9..807b44ef 100644
--- a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SsmlVoiceGender.java
+++ b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SsmlVoiceGender.java
@@ -170,6 +170,10 @@ public SsmlVoiceGender findValueByNumber(int number) {
       };
 
   public final com.google.protobuf.Descriptors.EnumValueDescriptor getValueDescriptor() {
+    if (this == UNRECOGNIZED) {
+      throw new java.lang.IllegalStateException(
+          "Can't get the descriptor of an unrecognized enum value.");
+    }
     return getDescriptor().getValues().get(ordinal());
   }
 
diff --git a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesisInput.java b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesisInput.java
index ac1ea8ea..3ab25a4a 100644
--- a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesisInput.java
+++ b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesisInput.java
@@ -230,7 +230,7 @@ public com.google.protobuf.ByteString getTextBytes() {
    * The SSML document to be synthesized. The SSML document must be valid
    * and well-formed. Otherwise the RPC will fail and return
    * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-   * [SSML](/speech/text-to-speech/docs/ssml).
+   * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
    * </pre>
    *
    * <code>string ssml = 2;</code>
@@ -260,7 +260,7 @@ public java.lang.String getSsml() {
    * The SSML document to be synthesized. The SSML document must be valid
    * and well-formed. Otherwise the RPC will fail and return
    * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-   * [SSML](/speech/text-to-speech/docs/ssml).
+   * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
    * </pre>
    *
    * <code>string ssml = 2;</code>
@@ -678,6 +678,7 @@ public Builder clearInputSource() {
      *
      * @return The text.
      */
+    @java.lang.Override
     public java.lang.String getText() {
       java.lang.Object ref = "";
       if (inputSourceCase_ == 1) {
@@ -705,6 +706,7 @@ public java.lang.String getText() {
      *
      * @return The bytes for text.
      */
+    @java.lang.Override
     public com.google.protobuf.ByteString getTextBytes() {
       java.lang.Object ref = "";
       if (inputSourceCase_ == 1) {
@@ -791,13 +793,14 @@ public Builder setTextBytes(com.google.protobuf.ByteString value) {
      * The SSML document to be synthesized. The SSML document must be valid
      * and well-formed. Otherwise the RPC will fail and return
      * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-     * [SSML](/speech/text-to-speech/docs/ssml).
+     * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
      * </pre>
      *
      * <code>string ssml = 2;</code>
      *
      * @return The ssml.
      */
+    @java.lang.Override
     public java.lang.String getSsml() {
       java.lang.Object ref = "";
       if (inputSourceCase_ == 2) {
@@ -821,13 +824,14 @@ public java.lang.String getSsml() {
      * The SSML document to be synthesized. The SSML document must be valid
      * and well-formed. Otherwise the RPC will fail and return
      * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-     * [SSML](/speech/text-to-speech/docs/ssml).
+     * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
      * </pre>
      *
      * <code>string ssml = 2;</code>
      *
      * @return The bytes for ssml.
      */
+    @java.lang.Override
     public com.google.protobuf.ByteString getSsmlBytes() {
       java.lang.Object ref = "";
       if (inputSourceCase_ == 2) {
@@ -851,7 +855,7 @@ public com.google.protobuf.ByteString getSsmlBytes() {
      * The SSML document to be synthesized. The SSML document must be valid
      * and well-formed. Otherwise the RPC will fail and return
      * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-     * [SSML](/speech/text-to-speech/docs/ssml).
+     * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
      * </pre>
      *
      * <code>string ssml = 2;</code>
@@ -875,7 +879,7 @@ public Builder setSsml(java.lang.String value) {
      * The SSML document to be synthesized. The SSML document must be valid
      * and well-formed. Otherwise the RPC will fail and return
      * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-     * [SSML](/speech/text-to-speech/docs/ssml).
+     * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
      * </pre>
      *
      * <code>string ssml = 2;</code>
@@ -897,7 +901,7 @@ public Builder clearSsml() {
      * The SSML document to be synthesized. The SSML document must be valid
      * and well-formed. Otherwise the RPC will fail and return
      * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-     * [SSML](/speech/text-to-speech/docs/ssml).
+     * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
      * </pre>
      *
      * <code>string ssml = 2;</code>
diff --git a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesisInputOrBuilder.java b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesisInputOrBuilder.java
index 1883ed70..9ed99112 100644
--- a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesisInputOrBuilder.java
+++ b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesisInputOrBuilder.java
@@ -55,7 +55,7 @@ public interface SynthesisInputOrBuilder
    * The SSML document to be synthesized. The SSML document must be valid
    * and well-formed. Otherwise the RPC will fail and return
    * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-   * [SSML](/speech/text-to-speech/docs/ssml).
+   * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
    * </pre>
    *
    * <code>string ssml = 2;</code>
@@ -70,7 +70,7 @@ public interface SynthesisInputOrBuilder
    * The SSML document to be synthesized. The SSML document must be valid
    * and well-formed. Otherwise the RPC will fail and return
    * [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-   * [SSML](/speech/text-to-speech/docs/ssml).
+   * [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
    * </pre>
    *
    * <code>string ssml = 2;</code>
diff --git a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesizeSpeechRequest.java b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesizeSpeechRequest.java
index c748e4cb..ad4572b0 100644
--- a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesizeSpeechRequest.java
+++ b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesizeSpeechRequest.java
@@ -168,6 +168,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * @return Whether the input field is set.
    */
+  @java.lang.Override
   public boolean hasInput() {
     return input_ != null;
   }
@@ -184,6 +185,7 @@ public boolean hasInput() {
    *
    * @return The input.
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1beta1.SynthesisInput getInput() {
     return input_ == null
         ? com.google.cloud.texttospeech.v1beta1.SynthesisInput.getDefaultInstance()
@@ -200,6 +202,7 @@ public com.google.cloud.texttospeech.v1beta1.SynthesisInput getInput() {
    * .google.cloud.texttospeech.v1beta1.SynthesisInput input = 1 [(.google.api.field_behavior) = REQUIRED];
    * </code>
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1beta1.SynthesisInputOrBuilder getInputOrBuilder() {
     return getInput();
   }
@@ -219,6 +222,7 @@ public com.google.cloud.texttospeech.v1beta1.SynthesisInputOrBuilder getInputOrB
    *
    * @return Whether the voice field is set.
    */
+  @java.lang.Override
   public boolean hasVoice() {
     return voice_ != null;
   }
@@ -235,6 +239,7 @@ public boolean hasVoice() {
    *
    * @return The voice.
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1beta1.VoiceSelectionParams getVoice() {
     return voice_ == null
         ? com.google.cloud.texttospeech.v1beta1.VoiceSelectionParams.getDefaultInstance()
@@ -251,6 +256,7 @@ public com.google.cloud.texttospeech.v1beta1.VoiceSelectionParams getVoice() {
    * .google.cloud.texttospeech.v1beta1.VoiceSelectionParams voice = 2 [(.google.api.field_behavior) = REQUIRED];
    * </code>
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1beta1.VoiceSelectionParamsOrBuilder getVoiceOrBuilder() {
     return getVoice();
   }
@@ -270,6 +276,7 @@ public com.google.cloud.texttospeech.v1beta1.VoiceSelectionParamsOrBuilder getVo
    *
    * @return Whether the audioConfig field is set.
    */
+  @java.lang.Override
   public boolean hasAudioConfig() {
     return audioConfig_ != null;
   }
@@ -286,6 +293,7 @@ public boolean hasAudioConfig() {
    *
    * @return The audioConfig.
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1beta1.AudioConfig getAudioConfig() {
     return audioConfig_ == null
         ? com.google.cloud.texttospeech.v1beta1.AudioConfig.getDefaultInstance()
@@ -302,6 +310,7 @@ public com.google.cloud.texttospeech.v1beta1.AudioConfig getAudioConfig() {
    * .google.cloud.texttospeech.v1beta1.AudioConfig audio_config = 3 [(.google.api.field_behavior) = REQUIRED];
    * </code>
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1beta1.AudioConfigOrBuilder getAudioConfigOrBuilder() {
     return getAudioConfig();
   }
diff --git a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesizeSpeechResponse.java b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesizeSpeechResponse.java
index 547a42fc..3dd650e7 100644
--- a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesizeSpeechResponse.java
+++ b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesizeSpeechResponse.java
@@ -126,6 +126,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * @return The audioContent.
    */
+  @java.lang.Override
   public com.google.protobuf.ByteString getAudioContent() {
     return audioContent_;
   }
@@ -467,6 +468,7 @@ public Builder mergeFrom(
      *
      * @return The audioContent.
      */
+    @java.lang.Override
     public com.google.protobuf.ByteString getAudioContent() {
       return audioContent_;
     }
diff --git a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/Voice.java b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/Voice.java
index 220be123..da9db336 100644
--- a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/Voice.java
+++ b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/Voice.java
@@ -221,6 +221,7 @@ public com.google.protobuf.ByteString getLanguageCodesBytes(int index) {
    *
    * @return The name.
    */
+  @java.lang.Override
   public java.lang.String getName() {
     java.lang.Object ref = name_;
     if (ref instanceof java.lang.String) {
@@ -243,6 +244,7 @@ public java.lang.String getName() {
    *
    * @return The bytes for name.
    */
+  @java.lang.Override
   public com.google.protobuf.ByteString getNameBytes() {
     java.lang.Object ref = name_;
     if (ref instanceof java.lang.String) {
@@ -268,6 +270,7 @@ public com.google.protobuf.ByteString getNameBytes() {
    *
    * @return The enum numeric value on the wire for ssmlGender.
    */
+  @java.lang.Override
   public int getSsmlGenderValue() {
     return ssmlGender_;
   }
@@ -282,6 +285,7 @@ public int getSsmlGenderValue() {
    *
    * @return The ssmlGender.
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1beta1.SsmlVoiceGender getSsmlGender() {
     @SuppressWarnings("deprecation")
     com.google.cloud.texttospeech.v1beta1.SsmlVoiceGender result =
@@ -304,6 +308,7 @@ public com.google.cloud.texttospeech.v1beta1.SsmlVoiceGender getSsmlGender() {
    *
    * @return The naturalSampleRateHertz.
    */
+  @java.lang.Override
   public int getNaturalSampleRateHertz() {
     return naturalSampleRateHertz_;
   }
@@ -998,6 +1003,7 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
      *
      * @return The enum numeric value on the wire for ssmlGender.
      */
+    @java.lang.Override
     public int getSsmlGenderValue() {
       return ssmlGender_;
     }
@@ -1014,6 +1020,7 @@ public int getSsmlGenderValue() {
      * @return This builder for chaining.
      */
     public Builder setSsmlGenderValue(int value) {
+
       ssmlGender_ = value;
       onChanged();
       return this;
@@ -1029,6 +1036,7 @@ public Builder setSsmlGenderValue(int value) {
      *
      * @return The ssmlGender.
      */
+    @java.lang.Override
     public com.google.cloud.texttospeech.v1beta1.SsmlVoiceGender getSsmlGender() {
       @SuppressWarnings("deprecation")
       com.google.cloud.texttospeech.v1beta1.SsmlVoiceGender result =
@@ -1088,6 +1096,7 @@ public Builder clearSsmlGender() {
      *
      * @return The naturalSampleRateHertz.
      */
+    @java.lang.Override
     public int getNaturalSampleRateHertz() {
       return naturalSampleRateHertz_;
     }
diff --git a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/VoiceSelectionParams.java b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/VoiceSelectionParams.java
index 866f4a25..e584a40b 100644
--- a/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/VoiceSelectionParams.java
+++ b/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/VoiceSelectionParams.java
@@ -150,6 +150,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * @return The languageCode.
    */
+  @java.lang.Override
   public java.lang.String getLanguageCode() {
     java.lang.Object ref = languageCode_;
     if (ref instanceof java.lang.String) {
@@ -182,6 +183,7 @@ public java.lang.String getLanguageCode() {
    *
    * @return The bytes for languageCode.
    */
+  @java.lang.Override
   public com.google.protobuf.ByteString getLanguageCodeBytes() {
     java.lang.Object ref = languageCode_;
     if (ref instanceof java.lang.String) {
@@ -208,6 +210,7 @@ public com.google.protobuf.ByteString getLanguageCodeBytes() {
    *
    * @return The name.
    */
+  @java.lang.Override
   public java.lang.String getName() {
     java.lang.Object ref = name_;
     if (ref instanceof java.lang.String) {
@@ -231,6 +234,7 @@ public java.lang.String getName() {
    *
    * @return The bytes for name.
    */
+  @java.lang.Override
   public com.google.protobuf.ByteString getNameBytes() {
     java.lang.Object ref = name_;
     if (ref instanceof java.lang.String) {
@@ -260,6 +264,7 @@ public com.google.protobuf.ByteString getNameBytes() {
    *
    * @return The enum numeric value on the wire for ssmlGender.
    */
+  @java.lang.Override
   public int getSsmlGenderValue() {
     return ssmlGender_;
   }
@@ -278,6 +283,7 @@ public int getSsmlGenderValue() {
    *
    * @return The ssmlGender.
    */
+  @java.lang.Override
   public com.google.cloud.texttospeech.v1beta1.SsmlVoiceGender getSsmlGender() {
     @SuppressWarnings("deprecation")
     com.google.cloud.texttospeech.v1beta1.SsmlVoiceGender result =
@@ -924,6 +930,7 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
      *
      * @return The enum numeric value on the wire for ssmlGender.
      */
+    @java.lang.Override
     public int getSsmlGenderValue() {
       return ssmlGender_;
     }
@@ -944,6 +951,7 @@ public int getSsmlGenderValue() {
      * @return This builder for chaining.
      */
     public Builder setSsmlGenderValue(int value) {
+
       ssmlGender_ = value;
       onChanged();
       return this;
@@ -963,6 +971,7 @@ public Builder setSsmlGenderValue(int value) {
      *
      * @return The ssmlGender.
      */
+    @java.lang.Override
     public com.google.cloud.texttospeech.v1beta1.SsmlVoiceGender getSsmlGender() {
       @SuppressWarnings("deprecation")
       com.google.cloud.texttospeech.v1beta1.SsmlVoiceGender result =
diff --git a/proto-google-cloud-texttospeech-v1beta1/src/main/proto/google/cloud/texttospeech/v1beta1/cloud_tts.proto b/proto-google-cloud-texttospeech-v1beta1/src/main/proto/google/cloud/texttospeech/v1beta1/cloud_tts.proto
index f8189b3f..f50a7fbd 100644
--- a/proto-google-cloud-texttospeech-v1beta1/src/main/proto/google/cloud/texttospeech/v1beta1/cloud_tts.proto
+++ b/proto-google-cloud-texttospeech-v1beta1/src/main/proto/google/cloud/texttospeech/v1beta1/cloud_tts.proto
@@ -155,7 +155,7 @@ message SynthesisInput {
     // The SSML document to be synthesized. The SSML document must be valid
     // and well-formed. Otherwise the RPC will fail and return
     // [google.rpc.Code.INVALID_ARGUMENT][]. For more information, see
-    // [SSML](/speech/text-to-speech/docs/ssml).
+    // [SSML](https://cloud.google.com/text-to-speech/docs/ssml).
     string ssml = 2;
   }
 }
diff --git a/synth.metadata b/synth.metadata
index 8ac295ef..9fc7c33f 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -11,16 +11,16 @@
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "5a90d467aa65e7f038f87585e8fbb45d74475e7c",
-        "internalRef": "312088359"
+        "sha": "55094be6405640329ddc93730962b9f7e68a0fc1",
+        "internalRef": "314438331"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "5a90d467aa65e7f038f87585e8fbb45d74475e7c",
-        "internalRef": "312088359"
+        "sha": "55094be6405640329ddc93730962b9f7e68a0fc1",
+        "internalRef": "314438331"
       }
     },
     {