diff --git a/proto-google-cloud-document-ai-v1/src/main/java/com/google/cloud/documentai/v1/Document.java b/proto-google-cloud-document-ai-v1/src/main/java/com/google/cloud/documentai/v1/Document.java
index b555a701..b7f0e4b4 100644
--- a/proto-google-cloud-document-ai-v1/src/main/java/com/google/cloud/documentai/v1/Document.java
+++ b/proto-google-cloud-document-ai-v1/src/main/java/com/google/cloud/documentai/v1/Document.java
@@ -42829,6 +42829,19 @@ public interface PageRefOrBuilder
        * </code>
        */
       com.google.cloud.documentai.v1.BoundingPolyOrBuilder getBoundingPolyOrBuilder();
+
+      /**
+       *
+       *
+       * <pre>
+       * Optional. Confidence of detected page element, if applicable. Range [0, 1].
+       * </pre>
+       *
+       * <code>float confidence = 5 [(.google.api.field_behavior) = OPTIONAL];</code>
+       *
+       * @return The confidence.
+       */
+      float getConfidence();
     }
     /**
      *
@@ -42916,6 +42929,11 @@ private PageRef(
                     boundingPoly_ = subBuilder.buildPartial();
                   }
 
+                  break;
+                }
+              case 45:
+                {
+                  confidence_ = input.readFloat();
                   break;
                 }
               default:
@@ -43392,6 +43410,24 @@ public com.google.cloud.documentai.v1.BoundingPolyOrBuilder getBoundingPolyOrBui
         return getBoundingPoly();
       }
 
+      public static final int CONFIDENCE_FIELD_NUMBER = 5;
+      private float confidence_;
+      /**
+       *
+       *
+       * <pre>
+       * Optional. Confidence of detected page element, if applicable. Range [0, 1].
+       * </pre>
+       *
+       * <code>float confidence = 5 [(.google.api.field_behavior) = OPTIONAL];</code>
+       *
+       * @return The confidence.
+       */
+      @java.lang.Override
+      public float getConfidence() {
+        return confidence_;
+      }
+
       private byte memoizedIsInitialized = -1;
 
       @java.lang.Override
@@ -43421,6 +43457,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
         if (boundingPoly_ != null) {
           output.writeMessage(4, getBoundingPoly());
         }
+        if (confidence_ != 0F) {
+          output.writeFloat(5, confidence_);
+        }
         unknownFields.writeTo(output);
       }
 
@@ -43445,6 +43484,9 @@ public int getSerializedSize() {
         if (boundingPoly_ != null) {
           size += com.google.protobuf.CodedOutputStream.computeMessageSize(4, getBoundingPoly());
         }
+        if (confidence_ != 0F) {
+          size += com.google.protobuf.CodedOutputStream.computeFloatSize(5, confidence_);
+        }
         size += unknownFields.getSerializedSize();
         memoizedSize = size;
         return size;
@@ -43468,6 +43510,8 @@ public boolean equals(final java.lang.Object obj) {
         if (hasBoundingPoly()) {
           if (!getBoundingPoly().equals(other.getBoundingPoly())) return false;
         }
+        if (java.lang.Float.floatToIntBits(getConfidence())
+            != java.lang.Float.floatToIntBits(other.getConfidence())) return false;
         if (!unknownFields.equals(other.unknownFields)) return false;
         return true;
       }
@@ -43489,6 +43533,8 @@ public int hashCode() {
           hash = (37 * hash) + BOUNDING_POLY_FIELD_NUMBER;
           hash = (53 * hash) + getBoundingPoly().hashCode();
         }
+        hash = (37 * hash) + CONFIDENCE_FIELD_NUMBER;
+        hash = (53 * hash) + java.lang.Float.floatToIntBits(getConfidence());
         hash = (29 * hash) + unknownFields.hashCode();
         memoizedHashCode = hash;
         return hash;
@@ -43649,6 +43695,8 @@ public Builder clear() {
             boundingPoly_ = null;
             boundingPolyBuilder_ = null;
           }
+          confidence_ = 0F;
+
           return this;
         }
 
@@ -43685,6 +43733,7 @@ public com.google.cloud.documentai.v1.Document.PageAnchor.PageRef buildPartial()
           } else {
             result.boundingPoly_ = boundingPolyBuilder_.build();
           }
+          result.confidence_ = confidence_;
           onBuilt();
           return result;
         }
@@ -43751,6 +43800,9 @@ public Builder mergeFrom(com.google.cloud.documentai.v1.Document.PageAnchor.Page
           if (other.hasBoundingPoly()) {
             mergeBoundingPoly(other.getBoundingPoly());
           }
+          if (other.getConfidence() != 0F) {
+            setConfidence(other.getConfidence());
+          }
           this.mergeUnknownFields(other.unknownFields);
           onChanged();
           return this;
@@ -44263,6 +44315,58 @@ public com.google.cloud.documentai.v1.BoundingPolyOrBuilder getBoundingPolyOrBui
           return boundingPolyBuilder_;
         }
 
+        private float confidence_;
+        /**
+         *
+         *
+         * <pre>
+         * Optional. Confidence of detected page element, if applicable. Range [0, 1].
+         * </pre>
+         *
+         * <code>float confidence = 5 [(.google.api.field_behavior) = OPTIONAL];</code>
+         *
+         * @return The confidence.
+         */
+        @java.lang.Override
+        public float getConfidence() {
+          return confidence_;
+        }
+        /**
+         *
+         *
+         * <pre>
+         * Optional. Confidence of detected page element, if applicable. Range [0, 1].
+         * </pre>
+         *
+         * <code>float confidence = 5 [(.google.api.field_behavior) = OPTIONAL];</code>
+         *
+         * @param value The confidence to set.
+         * @return This builder for chaining.
+         */
+        public Builder setConfidence(float value) {
+
+          confidence_ = value;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * <pre>
+         * Optional. Confidence of detected page element, if applicable. Range [0, 1].
+         * </pre>
+         *
+         * <code>float confidence = 5 [(.google.api.field_behavior) = OPTIONAL];</code>
+         *
+         * @return This builder for chaining.
+         */
+        public Builder clearConfidence() {
+
+          confidence_ = 0F;
+          onChanged();
+          return this;
+        }
+
         @java.lang.Override
         public final Builder setUnknownFields(
             final com.google.protobuf.UnknownFieldSet unknownFields) {
diff --git a/proto-google-cloud-document-ai-v1/src/main/java/com/google/cloud/documentai/v1/DocumentProto.java b/proto-google-cloud-document-ai-v1/src/main/java/com/google/cloud/documentai/v1/DocumentProto.java
index 85978fde..f906f4ff 100644
--- a/proto-google-cloud-document-ai-v1/src/main/java/com/google/cloud/documentai/v1/DocumentProto.java
+++ b/proto-google-cloud-document-ai-v1/src/main/java/com/google/cloud/documentai/v1/DocumentProto.java
@@ -173,7 +173,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "ype/date.proto\032\032google/type/datetime.pro"
           + "to\032\027google/type/money.proto\032 google/type"
           + "/postal_address.proto\032\034google/api/annota"
-          + "tions.proto\"\2158\n\010Document\022\022\n\003uri\030\001 \001(\tB\003\340"
+          + "tions.proto\"\2468\n\010Document\022\022\n\003uri\030\001 \001(\tB\003\340"
           + "A\001H\000\022\026\n\007content\030\002 \001(\014B\003\340A\001H\000\022\021\n\tmime_typ"
           + "e\030\003 \001(\t\022\021\n\004text\030\004 \001(\tB\003\340A\001\022?\n\013text_style"
           + "s\030\005 \003(\0132*.google.cloud.documentai.v1.Doc"
@@ -320,45 +320,45 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "ext_segments\030\001 \003(\0132;.google.cloud.docume"
           + "ntai.v1.Document.TextAnchor.TextSegment\022"
           + "\017\n\007content\030\002 \001(\t\0325\n\013TextSegment\022\023\n\013start"
-          + "_index\030\001 \001(\003\022\021\n\tend_index\030\002 \001(\003\032\277\003\n\nPage"
+          + "_index\030\001 \001(\003\022\021\n\tend_index\030\002 \001(\003\032\330\003\n\nPage"
           + "Anchor\022J\n\tpage_refs\030\001 \003(\01327.google.cloud"
           + ".documentai.v1.Document.PageAnchor.PageR"
-          + "ef\032\344\002\n\007PageRef\022\021\n\004page\030\001 \001(\003B\003\340A\002\022\\\n\013lay"
+          + "ef\032\375\002\n\007PageRef\022\021\n\004page\030\001 \001(\003B\003\340A\002\022\\\n\013lay"
           + "out_type\030\002 \001(\0162B.google.cloud.documentai"
           + ".v1.Document.PageAnchor.PageRef.LayoutTy"
           + "peB\003\340A\001\022\030\n\tlayout_id\030\003 \001(\tB\005\030\001\340A\001\022D\n\rbou"
           + "nding_poly\030\004 \001(\0132(.google.cloud.document"
-          + "ai.v1.BoundingPolyB\003\340A\001\"\207\001\n\nLayoutType\022\033"
-          + "\n\027LAYOUT_TYPE_UNSPECIFIED\020\000\022\t\n\005BLOCK\020\001\022\r"
-          + "\n\tPARAGRAPH\020\002\022\010\n\004LINE\020\003\022\t\n\005TOKEN\020\004\022\022\n\016VI"
-          + "SUAL_ELEMENT\020\005\022\t\n\005TABLE\020\006\022\016\n\nFORM_FIELD\020"
-          + "\007\032\365\002\n\nProvenance\022\020\n\010revision\030\001 \001(\005\022\n\n\002id"
-          + "\030\002 \001(\005\022G\n\007parents\030\003 \003(\01326.google.cloud.d"
-          + "ocumentai.v1.Document.Provenance.Parent\022"
-          + "K\n\004type\030\004 \001(\0162=.google.cloud.documentai."
-          + "v1.Document.Provenance.OperationType\032&\n\006"
-          + "Parent\022\020\n\010revision\030\001 \001(\005\022\n\n\002id\030\002 \001(\005\"\212\001\n"
-          + "\rOperationType\022\036\n\032OPERATION_TYPE_UNSPECI"
-          + "FIED\020\000\022\007\n\003ADD\020\001\022\n\n\006REMOVE\020\002\022\013\n\007REPLACE\020\003"
-          + "\022\022\n\016EVAL_REQUESTED\020\004\022\021\n\rEVAL_APPROVED\020\005\022"
-          + "\020\n\014EVAL_SKIPPED\020\006\032\215\002\n\010Revision\022\017\n\005agent\030"
-          + "\004 \001(\tH\000\022\023\n\tprocessor\030\005 \001(\tH\000\022\n\n\002id\030\001 \001(\t"
-          + "\022\016\n\006parent\030\002 \003(\005\022/\n\013create_time\030\003 \001(\0132\032."
-          + "google.protobuf.Timestamp\022O\n\014human_revie"
-          + "w\030\006 \001(\01329.google.cloud.documentai.v1.Doc"
-          + "ument.Revision.HumanReview\0323\n\013HumanRevie"
-          + "w\022\r\n\005state\030\001 \001(\t\022\025\n\rstate_message\030\002 \001(\tB"
-          + "\010\n\006source\032\255\001\n\nTextChange\022D\n\013text_anchor\030"
-          + "\001 \001(\0132/.google.cloud.documentai.v1.Docum"
-          + "ent.TextAnchor\022\024\n\014changed_text\030\002 \001(\t\022C\n\n"
-          + "provenance\030\003 \003(\0132/.google.cloud.document"
-          + "ai.v1.Document.ProvenanceB\010\n\006sourceB\321\001\n\036"
-          + "com.google.cloud.documentai.v1B\rDocument"
-          + "ProtoP\001ZDgoogle.golang.org/genproto/goog"
-          + "leapis/cloud/documentai/v1;documentai\252\002\032"
-          + "Google.Cloud.DocumentAI.V1\312\002\032Google\\Clou"
-          + "d\\DocumentAI\\V1\352\002\035Google::Cloud::Documen"
-          + "tAI::V1b\006proto3"
+          + "ai.v1.BoundingPolyB\003\340A\001\022\027\n\nconfidence\030\005 "
+          + "\001(\002B\003\340A\001\"\207\001\n\nLayoutType\022\033\n\027LAYOUT_TYPE_U"
+          + "NSPECIFIED\020\000\022\t\n\005BLOCK\020\001\022\r\n\tPARAGRAPH\020\002\022\010"
+          + "\n\004LINE\020\003\022\t\n\005TOKEN\020\004\022\022\n\016VISUAL_ELEMENT\020\005\022"
+          + "\t\n\005TABLE\020\006\022\016\n\nFORM_FIELD\020\007\032\365\002\n\nProvenanc"
+          + "e\022\020\n\010revision\030\001 \001(\005\022\n\n\002id\030\002 \001(\005\022G\n\007paren"
+          + "ts\030\003 \003(\01326.google.cloud.documentai.v1.Do"
+          + "cument.Provenance.Parent\022K\n\004type\030\004 \001(\0162="
+          + ".google.cloud.documentai.v1.Document.Pro"
+          + "venance.OperationType\032&\n\006Parent\022\020\n\010revis"
+          + "ion\030\001 \001(\005\022\n\n\002id\030\002 \001(\005\"\212\001\n\rOperationType\022"
+          + "\036\n\032OPERATION_TYPE_UNSPECIFIED\020\000\022\007\n\003ADD\020\001"
+          + "\022\n\n\006REMOVE\020\002\022\013\n\007REPLACE\020\003\022\022\n\016EVAL_REQUES"
+          + "TED\020\004\022\021\n\rEVAL_APPROVED\020\005\022\020\n\014EVAL_SKIPPED"
+          + "\020\006\032\215\002\n\010Revision\022\017\n\005agent\030\004 \001(\tH\000\022\023\n\tproc"
+          + "essor\030\005 \001(\tH\000\022\n\n\002id\030\001 \001(\t\022\016\n\006parent\030\002 \003("
+          + "\005\022/\n\013create_time\030\003 \001(\0132\032.google.protobuf"
+          + ".Timestamp\022O\n\014human_review\030\006 \001(\01329.googl"
+          + "e.cloud.documentai.v1.Document.Revision."
+          + "HumanReview\0323\n\013HumanReview\022\r\n\005state\030\001 \001("
+          + "\t\022\025\n\rstate_message\030\002 \001(\tB\010\n\006source\032\255\001\n\nT"
+          + "extChange\022D\n\013text_anchor\030\001 \001(\0132/.google."
+          + "cloud.documentai.v1.Document.TextAnchor\022"
+          + "\024\n\014changed_text\030\002 \001(\t\022C\n\nprovenance\030\003 \003("
+          + "\0132/.google.cloud.documentai.v1.Document."
+          + "ProvenanceB\010\n\006sourceB\321\001\n\036com.google.clou"
+          + "d.documentai.v1B\rDocumentProtoP\001ZDgoogle"
+          + ".golang.org/genproto/googleapis/cloud/do"
+          + "cumentai/v1;documentai\252\002\032Google.Cloud.Do"
+          + "cumentAI.V1\312\002\032Google\\Cloud\\DocumentAI\\V1"
+          + "\352\002\035Google::Cloud::DocumentAI::V1b\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
@@ -657,7 +657,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_cloud_documentai_v1_Document_PageAnchor_PageRef_descriptor,
             new java.lang.String[] {
-              "Page", "LayoutType", "LayoutId", "BoundingPoly",
+              "Page", "LayoutType", "LayoutId", "BoundingPoly", "Confidence",
             });
     internal_static_google_cloud_documentai_v1_Document_Provenance_descriptor =
         internal_static_google_cloud_documentai_v1_Document_descriptor.getNestedTypes().get(7);
diff --git a/proto-google-cloud-document-ai-v1/src/main/proto/google/cloud/documentai/v1/document.proto b/proto-google-cloud-document-ai-v1/src/main/proto/google/cloud/documentai/v1/document.proto
index 21412e98..eb4615c1 100644
--- a/proto-google-cloud-document-ai-v1/src/main/proto/google/cloud/documentai/v1/document.proto
+++ b/proto-google-cloud-document-ai-v1/src/main/proto/google/cloud/documentai/v1/document.proto
@@ -549,6 +549,9 @@ message Document {
 
       // Optional. Identifies the bounding polygon of a layout element on the page.
       BoundingPoly bounding_poly = 4 [(google.api.field_behavior) = OPTIONAL];
+
+      // Optional. Confidence of detected page element, if applicable. Range [0, 1].
+      float confidence = 5 [(google.api.field_behavior) = OPTIONAL];
     }
 
     // One or more references to visual page elements
diff --git a/synth.metadata b/synth.metadata
index 803a7c6b..fd42a197 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,39 +4,39 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-document-ai.git",
-        "sha": "03c7a9b10e8c1db2219ada1fbedaa8cc5f5595e2"
+        "sha": "952106ebcfa227d552beeb84e3fe816223e899a0"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "f07131004bbcab3737d1241b34341d1b76ae7712",
-        "internalRef": "370028868"
+        "sha": "7713e2e860003a84b35b701de29dd0769795e1e3",
+        "internalRef": "370513265"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "f07131004bbcab3737d1241b34341d1b76ae7712",
-        "internalRef": "370028868"
+        "sha": "7713e2e860003a84b35b701de29dd0769795e1e3",
+        "internalRef": "370513265"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "f07131004bbcab3737d1241b34341d1b76ae7712",
-        "internalRef": "370028868"
+        "sha": "7713e2e860003a84b35b701de29dd0769795e1e3",
+        "internalRef": "370513265"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "f07131004bbcab3737d1241b34341d1b76ae7712",
-        "internalRef": "370028868"
+        "sha": "7713e2e860003a84b35b701de29dd0769795e1e3",
+        "internalRef": "370513265"
       }
     },
     {