diff --git a/CHANGELOG.md b/CHANGELOG.md
index 420d40ea..3b884a11 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+### [0.43.1](https://www.github.com/googleapis/java-iamcredentials/compare/v0.43.0...v0.43.1) (2020-01-07)
+
+
+### Dependencies
+
+* update dependency com.google.protobuf:protobuf-java to v3.11.1 ([a52b46d](https://www.github.com/googleapis/java-iamcredentials/commit/a52b46d556cee61c56fae3b509d9cee4cbfd3ff6))
+* update dependency io.grpc:grpc-bom to v1.26.0 ([#30](https://www.github.com/googleapis/java-iamcredentials/issues/30)) ([28040be](https://www.github.com/googleapis/java-iamcredentials/commit/28040be05ec4963bcd2f867472bb2e885813211a))
+* update gax.version to v1.52.0 ([#24](https://www.github.com/googleapis/java-iamcredentials/issues/24)) ([52b0cb7](https://www.github.com/googleapis/java-iamcredentials/commit/52b0cb78c26dc6819b836238e05ea7c07337859d))
+
+
+### Documentation
+
+* **regen:** updated javadocs from protoc update ([#25](https://www.github.com/googleapis/java-iamcredentials/issues/25)) ([0896e12](https://www.github.com/googleapis/java-iamcredentials/commit/0896e12db13b82d183653eb71bf24db4dabcc4d1))
+
 ## [0.43.0](https://www.github.com/googleapis/java-iamcredentials/compare/0.42.0...v0.43.0) (2019-10-25)
 
 
diff --git a/README.md b/README.md
index ee22ac95..d6aebe05 100644
--- a/README.md
+++ b/README.md
@@ -41,16 +41,16 @@ If you are using Maven without a BOM, add this to your dependencies.
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-iamcredentials</artifactId>
-  <version>0.43.0-alpha</version>
+  <version>0.43.1-alpha</version>
 </dependency>
 ```
 If you are using Gradle, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-iamcredentials:0.43.0-alpha'
+compile 'com.google.cloud:google-cloud-iamcredentials:0.43.1-alpha'
 ```
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-iamcredentials" % "0.43.0-alpha"
+libraryDependencies += "com.google.cloud" % "google-cloud-iamcredentials" % "0.43.1-alpha"
 ```
 [//]: # ({x-version-update-end})
 
diff --git a/google-cloud-iamcredentials-bom/pom.xml b/google-cloud-iamcredentials-bom/pom.xml
index 4cc5838d..b764a498 100644
--- a/google-cloud-iamcredentials-bom/pom.xml
+++ b/google-cloud-iamcredentials-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-iamcredentials-bom</artifactId>
-  <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+  <version>0.43.1-alpha</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -64,17 +64,17 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-iamcredentials</artifactId>
-        <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+        <version>0.43.1-alpha</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-iamcredentials-v1</artifactId>
-        <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-iamcredentials-v1:current} -->
+        <version>0.43.1-alpha</version><!-- {x-version-update:grpc-google-cloud-iamcredentials-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-iamcredentials-v1</artifactId>
-        <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-iamcredentials-v1:current} -->
+        <version>0.43.1-alpha</version><!-- {x-version-update:proto-google-cloud-iamcredentials-v1:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-iamcredentials/pom.xml b/google-cloud-iamcredentials/pom.xml
index cdeaaedd..2f40d330 100644
--- a/google-cloud-iamcredentials/pom.xml
+++ b/google-cloud-iamcredentials/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-iamcredentials</artifactId>
-  <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+  <version>0.43.1-alpha</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud IAM Service Account Credentials</name>
   <url>https://github.com/googleapis/java-iamcredentials</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-iamcredentials-parent</artifactId>
-    <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+    <version>0.43.1-alpha</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-iamcredentials</site.installationModule>
diff --git a/grpc-google-cloud-iamcredentials-v1/pom.xml b/grpc-google-cloud-iamcredentials-v1/pom.xml
index c6c4c7a9..c707adfe 100644
--- a/grpc-google-cloud-iamcredentials-v1/pom.xml
+++ b/grpc-google-cloud-iamcredentials-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-iamcredentials-v1</artifactId>
-  <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-iamcredentials-v1:current} -->
+  <version>0.43.1-alpha</version><!-- {x-version-update:grpc-google-cloud-iamcredentials-v1:current} -->
   <name>grpc-google-cloud-iamcredentials-v1</name>
   <description>GRPC library for grpc-google-cloud-iamcredentials-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-iamcredentials-parent</artifactId>
-    <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+    <version>0.43.1-alpha</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index 6b0eae4b..b83091bb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-iamcredentials-parent</artifactId>
   <packaging>pom</packaging>
-  <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+  <version>0.43.1-alpha</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
   <name>Google Cloud IAM Service Account Credentials Parent</name>
   <url>https://github.com/googleapis/java-iamcredentials</url>
   <description>
@@ -81,17 +81,17 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-iamcredentials-v1</artifactId>
-        <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-iamcredentials-v1:current} -->
+        <version>0.43.1-alpha</version><!-- {x-version-update:proto-google-cloud-iamcredentials-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-iamcredentials-v1</artifactId>
-        <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-iamcredentials-v1:current} -->
+        <version>0.43.1-alpha</version><!-- {x-version-update:grpc-google-cloud-iamcredentials-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-iamcredentials</artifactId>
-        <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+        <version>0.43.1-alpha</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
       </dependency>
 
       <dependency>
diff --git a/proto-google-cloud-iamcredentials-v1/pom.xml b/proto-google-cloud-iamcredentials-v1/pom.xml
index ccdecbf2..aa83b2de 100644
--- a/proto-google-cloud-iamcredentials-v1/pom.xml
+++ b/proto-google-cloud-iamcredentials-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-iamcredentials-v1</artifactId>
-  <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-iamcredentials-v1:current} -->
+  <version>0.43.1-alpha</version><!-- {x-version-update:proto-google-cloud-iamcredentials-v1:current} -->
   <name>proto-google-cloud-iamcredentials-v1</name>
   <description>PROTO library for proto-google-cloud-iamcredentials-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-iamcredentials-parent</artifactId>
-    <version>0.43.1-alpha-SNAPSHOT</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+    <version>0.43.1-alpha</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/versions.txt b/versions.txt
index 81af4c41..0906ee26 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,6 +1,6 @@
 # Format:
 # module:released-version:current-version
 
-proto-google-cloud-iamcredentials-v1:0.43.0-alpha:0.43.1-alpha-SNAPSHOT
-grpc-google-cloud-iamcredentials-v1:0.43.0-alpha:0.43.1-alpha-SNAPSHOT
-google-cloud-iamcredentials:0.43.0-alpha:0.43.1-alpha-SNAPSHOT
+proto-google-cloud-iamcredentials-v1:0.43.1-alpha:0.43.1-alpha
+grpc-google-cloud-iamcredentials-v1:0.43.1-alpha:0.43.1-alpha
+google-cloud-iamcredentials:0.43.1-alpha:0.43.1-alpha