diff --git a/CHANGELOG.md b/CHANGELOG.md
index 321073db..911d71ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+### [2.3.1](https://www.github.com/googleapis/java-monitoring/compare/v2.3.0...v2.3.1) (2021-06-03)
+
+
+### Dependencies
+
+* update dependency com.google.protobuf:protobuf-java-util to v3.17.2 ([#571](https://www.github.com/googleapis/java-monitoring/issues/571)) ([8b361c3](https://www.github.com/googleapis/java-monitoring/commit/8b361c305f424e4fbf19c1bb873c0b0cbd090224))
+
 ## [2.3.0](https://www.github.com/googleapis/java-monitoring/compare/v2.2.3...v2.3.0) (2021-05-26)
 
 
diff --git a/google-cloud-monitoring-bom/pom.xml b/google-cloud-monitoring-bom/pom.xml
index 391eb262..be99106e 100644
--- a/google-cloud-monitoring-bom/pom.xml
+++ b/google-cloud-monitoring-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-monitoring-bom</artifactId>
-  <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-monitoring:current} -->
+  <version>2.3.1</version><!-- {x-version-update:google-cloud-monitoring:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -64,17 +64,17 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-monitoring</artifactId>
-        <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-monitoring:current} -->
+        <version>2.3.1</version><!-- {x-version-update:google-cloud-monitoring:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-monitoring-v3</artifactId>
-        <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-monitoring-v3:current} -->
+        <version>2.3.1</version><!-- {x-version-update:grpc-google-cloud-monitoring-v3:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-monitoring-v3</artifactId>
-        <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-monitoring-v3:current} -->
+        <version>2.3.1</version><!-- {x-version-update:proto-google-cloud-monitoring-v3:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-monitoring/pom.xml b/google-cloud-monitoring/pom.xml
index c0058e59..963832c5 100644
--- a/google-cloud-monitoring/pom.xml
+++ b/google-cloud-monitoring/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-monitoring</artifactId>
-  <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-monitoring:current} -->
+  <version>2.3.1</version><!-- {x-version-update:google-cloud-monitoring:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud Monitoring</name>
   <url>https://github.com/googleapis/java-monitoring</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-monitoring-parent</artifactId>
-    <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-monitoring:current} -->
+    <version>2.3.1</version><!-- {x-version-update:google-cloud-monitoring:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-monitoring</site.installationModule>
diff --git a/grpc-google-cloud-monitoring-v3/pom.xml b/grpc-google-cloud-monitoring-v3/pom.xml
index 82f517e1..85abcea8 100644
--- a/grpc-google-cloud-monitoring-v3/pom.xml
+++ b/grpc-google-cloud-monitoring-v3/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-monitoring-v3</artifactId>
-  <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-monitoring-v3:current} -->
+  <version>2.3.1</version><!-- {x-version-update:grpc-google-cloud-monitoring-v3:current} -->
   <name>grpc-google-cloud-monitoring-v3</name>
   <description>GRPC library for grpc-google-cloud-monitoring-v3</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-monitoring-parent</artifactId>
-    <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-monitoring:current} -->
+    <version>2.3.1</version><!-- {x-version-update:google-cloud-monitoring:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index 98eccbc5..08870edc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-monitoring-parent</artifactId>
   <packaging>pom</packaging>
-  <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-monitoring:current} -->
+  <version>2.3.1</version><!-- {x-version-update:google-cloud-monitoring:current} -->
   <name>Google Cloud Monitoring Parent</name>
   <url>https://github.com/googleapis/java-monitoring</url>
   <description>
@@ -70,17 +70,17 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-monitoring-v3</artifactId>
-        <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-monitoring-v3:current} -->
+        <version>2.3.1</version><!-- {x-version-update:proto-google-cloud-monitoring-v3:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-monitoring-v3</artifactId>
-        <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-monitoring-v3:current} -->
+        <version>2.3.1</version><!-- {x-version-update:grpc-google-cloud-monitoring-v3:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-monitoring</artifactId>
-        <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-monitoring:current} -->
+        <version>2.3.1</version><!-- {x-version-update:google-cloud-monitoring:current} -->
       </dependency>
 
       <dependency>
diff --git a/proto-google-cloud-monitoring-v3/pom.xml b/proto-google-cloud-monitoring-v3/pom.xml
index 3a6d1cba..7d51738b 100644
--- a/proto-google-cloud-monitoring-v3/pom.xml
+++ b/proto-google-cloud-monitoring-v3/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-monitoring-v3</artifactId>
-  <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-monitoring-v3:current} -->
+  <version>2.3.1</version><!-- {x-version-update:proto-google-cloud-monitoring-v3:current} -->
   <name>proto-google-cloud-monitoring-v3</name>
   <description>PROTO library for proto-google-cloud-monitoring-v3</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-monitoring-parent</artifactId>
-    <version>2.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-monitoring:current} -->
+    <version>2.3.1</version><!-- {x-version-update:google-cloud-monitoring:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/samples/install-without-bom/pom.xml b/samples/install-without-bom/pom.xml
index f120421b..c70c17e2 100644
--- a/samples/install-without-bom/pom.xml
+++ b/samples/install-without-bom/pom.xml
@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-monitoring</artifactId>
-      <version>2.3.1-SNAPSHOT</version>
+      <version>2.3.1</version>
     </dependency>
     <!-- [END monitoring_install_without_bom] -->
     <!-- {x-version-update-end} -->
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index b7ca14ec..dcef8a39 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-monitoring</artifactId>
-      <version>2.3.1-SNAPSHOT</version>
+      <version>2.3.1</version>
     </dependency>
     <!-- {x-version-update-end} -->
     <dependency>
diff --git a/versions.txt b/versions.txt
index 3b079793..27c3069d 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,6 +1,6 @@
 # Format:
 # module:released-version:current-version
 
-proto-google-cloud-monitoring-v3:2.3.0:2.3.1-SNAPSHOT
-grpc-google-cloud-monitoring-v3:2.3.0:2.3.1-SNAPSHOT
-google-cloud-monitoring:2.3.0:2.3.1-SNAPSHOT
\ No newline at end of file
+proto-google-cloud-monitoring-v3:2.3.1:2.3.1
+grpc-google-cloud-monitoring-v3:2.3.1:2.3.1
+google-cloud-monitoring:2.3.1:2.3.1
\ No newline at end of file