diff --git a/CHANGELOG.md b/CHANGELOG.md
index 95beeba9..8cfecbec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [3.1.2](https://github.com/googleapis/java-service-management/compare/v3.1.1...v3.1.2) (2022-06-30)
+
+
+### Bug Fixes
+
+* update gapic-generator-java with mock service generation fixes ([#255](https://github.com/googleapis/java-service-management/issues/255)) ([4eee177](https://github.com/googleapis/java-service-management/commit/4eee1773944cefbbc38b3027df16d17e79a79424))
+
 ## [3.1.1](https://github.com/googleapis/java-service-management/compare/v3.1.0...v3.1.1) (2022-06-23)
 
 
diff --git a/google-cloud-service-management-bom/pom.xml b/google-cloud-service-management-bom/pom.xml
index 87fc8045..641ede84 100644
--- a/google-cloud-service-management-bom/pom.xml
+++ b/google-cloud-service-management-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-service-management-bom</artifactId>
-  <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-management:current} -->
+  <version>3.1.2</version><!-- {x-version-update:google-cloud-service-management:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -57,17 +57,17 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-service-management</artifactId>
-        <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-management:current} -->
+        <version>3.1.2</version><!-- {x-version-update:google-cloud-service-management:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-service-management-v1</artifactId>
-        <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-service-management-v1:current} -->
+        <version>3.1.2</version><!-- {x-version-update:grpc-google-cloud-service-management-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-service-management-v1</artifactId>
-        <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-service-management-v1:current} -->
+        <version>3.1.2</version><!-- {x-version-update:proto-google-cloud-service-management-v1:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-service-management/pom.xml b/google-cloud-service-management/pom.xml
index 305dcc84..252427c4 100644
--- a/google-cloud-service-management/pom.xml
+++ b/google-cloud-service-management/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-service-management</artifactId>
-  <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-management:current} -->
+  <version>3.1.2</version><!-- {x-version-update:google-cloud-service-management:current} -->
   <packaging>jar</packaging>
   <name>Google Service Management API</name>
   <url>https://github.com/googleapis/java-service-management</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-service-management-parent</artifactId>
-    <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-management:current} -->
+    <version>3.1.2</version><!-- {x-version-update:google-cloud-service-management:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-service-management</site.installationModule>
diff --git a/grpc-google-cloud-service-management-v1/pom.xml b/grpc-google-cloud-service-management-v1/pom.xml
index 68f652ef..042acad2 100644
--- a/grpc-google-cloud-service-management-v1/pom.xml
+++ b/grpc-google-cloud-service-management-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-service-management-v1</artifactId>
-  <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-service-management-v1:current} -->
+  <version>3.1.2</version><!-- {x-version-update:grpc-google-cloud-service-management-v1:current} -->
   <name>grpc-google-cloud-service-management-v1</name>
   <description>GRPC library for google-cloud-service-management</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-service-management-parent</artifactId>
-    <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-management:current} -->
+    <version>3.1.2</version><!-- {x-version-update:google-cloud-service-management:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index ebd46a93..c6f9c6e6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-service-management-parent</artifactId>
   <packaging>pom</packaging>
-  <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-management:current} -->
+  <version>3.1.2</version><!-- {x-version-update:google-cloud-service-management:current} -->
   <name>Google Service Management API Parent</name>
   <url>https://github.com/googleapis/java-service-management</url>
   <description>
@@ -61,17 +61,17 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-service-management</artifactId>
-        <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-management:current} -->
+        <version>3.1.2</version><!-- {x-version-update:google-cloud-service-management:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-service-management-v1</artifactId>
-        <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-service-management-v1:current} -->
+        <version>3.1.2</version><!-- {x-version-update:proto-google-cloud-service-management-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-service-management-v1</artifactId>
-        <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-service-management-v1:current} -->
+        <version>3.1.2</version><!-- {x-version-update:grpc-google-cloud-service-management-v1:current} -->
       </dependency>
 
       <dependency>
diff --git a/proto-google-cloud-service-management-v1/pom.xml b/proto-google-cloud-service-management-v1/pom.xml
index 25432f01..af8e4314 100644
--- a/proto-google-cloud-service-management-v1/pom.xml
+++ b/proto-google-cloud-service-management-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-service-management-v1</artifactId>
-  <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-service-management-v1:current} -->
+  <version>3.1.2</version><!-- {x-version-update:proto-google-cloud-service-management-v1:current} -->
   <name>proto-google-cloud-service-management-v1</name>
   <description>Proto library for google-cloud-service-management</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-service-management-parent</artifactId>
-    <version>3.1.2-SNAPSHOT</version><!-- {x-version-update:google-cloud-service-management:current} -->
+    <version>3.1.2</version><!-- {x-version-update:google-cloud-service-management:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/versions.txt b/versions.txt
index 6ce9c116..c61b4dea 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,6 +1,6 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-service-management:3.1.1:3.1.2-SNAPSHOT
-grpc-google-cloud-service-management-v1:3.1.1:3.1.2-SNAPSHOT
-proto-google-cloud-service-management-v1:3.1.1:3.1.2-SNAPSHOT
+google-cloud-service-management:3.1.2:3.1.2
+grpc-google-cloud-service-management-v1:3.1.2:3.1.2
+proto-google-cloud-service-management-v1:3.1.2:3.1.2