diff --git a/CHANGELOG.md b/CHANGELOG.md
index 321ee286..8aac45c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+### [2.1.2](https://www.github.com/googleapis/java-bigqueryconnection/compare/v2.1.1...v2.1.2) (2021-09-15)
+
+
+### Dependencies
+
+* update dependency com.google.protobuf:protobuf-java-util to v3.18.0 ([#532](https://www.github.com/googleapis/java-bigqueryconnection/issues/532)) ([c9ba178](https://www.github.com/googleapis/java-bigqueryconnection/commit/c9ba178c2f7c85952c0a8cc873a5b170f712eb40))
+
 ### [2.1.1](https://www.github.com/googleapis/java-bigqueryconnection/compare/v2.1.0...v2.1.1) (2021-09-14)
 
 
diff --git a/google-cloud-bigqueryconnection-bom/pom.xml b/google-cloud-bigqueryconnection-bom/pom.xml
index 95bfaaba..87867a55 100644
--- a/google-cloud-bigqueryconnection-bom/pom.xml
+++ b/google-cloud-bigqueryconnection-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-bigqueryconnection-bom</artifactId>
-  <version>2.1.1</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
+  <version>2.1.2</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -52,27 +52,27 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigqueryconnection</artifactId>
-        <version>2.1.1</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
+        <version>2.1.2</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-bigqueryconnection-v1</artifactId>
-        <version>2.1.1</version><!-- {x-version-update:grpc-google-cloud-bigqueryconnection-v1:current} -->
+        <version>2.1.2</version><!-- {x-version-update:grpc-google-cloud-bigqueryconnection-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-bigqueryconnection-v1beta1</artifactId>
-        <version>0.9.1</version><!-- {x-version-update:grpc-google-cloud-bigqueryconnection-v1beta1:current} -->
+        <version>0.9.2</version><!-- {x-version-update:grpc-google-cloud-bigqueryconnection-v1beta1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-bigqueryconnection-v1</artifactId>
-        <version>2.1.1</version><!-- {x-version-update:proto-google-cloud-bigqueryconnection-v1:current} -->
+        <version>2.1.2</version><!-- {x-version-update:proto-google-cloud-bigqueryconnection-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-bigqueryconnection-v1beta1</artifactId>
-        <version>0.9.1</version><!-- {x-version-update:proto-google-cloud-bigqueryconnection-v1beta1:current} -->
+        <version>0.9.2</version><!-- {x-version-update:proto-google-cloud-bigqueryconnection-v1beta1:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-bigqueryconnection/pom.xml b/google-cloud-bigqueryconnection/pom.xml
index d6eaf687..5788bc97 100644
--- a/google-cloud-bigqueryconnection/pom.xml
+++ b/google-cloud-bigqueryconnection/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-bigqueryconnection</artifactId>
-  <version>2.1.1</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
+  <version>2.1.2</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud BigQuery Connections</name>
   <url>https://github.com/googleapis/java-bigqueryconnection</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-bigqueryconnection-parent</artifactId>
-    <version>2.1.1</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
+    <version>2.1.2</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-bigqueryconnection</site.installationModule>
diff --git a/grpc-google-cloud-bigqueryconnection-v1/pom.xml b/grpc-google-cloud-bigqueryconnection-v1/pom.xml
index 8bd79068..3709de21 100644
--- a/grpc-google-cloud-bigqueryconnection-v1/pom.xml
+++ b/grpc-google-cloud-bigqueryconnection-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-bigqueryconnection-v1</artifactId>
-  <version>2.1.1</version><!-- {x-version-update:grpc-google-cloud-bigqueryconnection-v1:current} -->
+  <version>2.1.2</version><!-- {x-version-update:grpc-google-cloud-bigqueryconnection-v1:current} -->
   <name>grpc-google-cloud-bigqueryconnection-v1</name>
   <description>GRPC library for grpc-google-cloud-bigqueryconnection-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-bigqueryconnection-parent</artifactId>
-    <version>2.1.1</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
+    <version>2.1.2</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/grpc-google-cloud-bigqueryconnection-v1beta1/pom.xml b/grpc-google-cloud-bigqueryconnection-v1beta1/pom.xml
index de294966..1e399d0f 100644
--- a/grpc-google-cloud-bigqueryconnection-v1beta1/pom.xml
+++ b/grpc-google-cloud-bigqueryconnection-v1beta1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-bigqueryconnection-v1beta1</artifactId>
-  <version>0.9.1</version><!-- {x-version-update:grpc-google-cloud-bigqueryconnection-v1beta1:current} -->
+  <version>0.9.2</version><!-- {x-version-update:grpc-google-cloud-bigqueryconnection-v1beta1:current} -->
   <name>grpc-google-cloud-bigqueryconnection-v1beta1</name>
   <description>GRPC library for grpc-google-cloud-bigqueryconnection-v1beta1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-bigqueryconnection-parent</artifactId>
-    <version>2.1.1</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
+    <version>2.1.2</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index 4612e95f..8f6c6e7a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-bigqueryconnection-parent</artifactId>
   <packaging>pom</packaging>
-  <version>2.1.1</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
+  <version>2.1.2</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
   <name>Google Cloud BigQuery Connections Parent</name>
   <url>https://github.com/googleapis/java-bigqueryconnection</url>
   <description>
@@ -62,27 +62,27 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigqueryconnection</artifactId>
-        <version>2.1.1</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
+        <version>2.1.2</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-bigqueryconnection-v1</artifactId>
-        <version>2.1.1</version><!-- {x-version-update:proto-google-cloud-bigqueryconnection-v1:current} -->
+        <version>2.1.2</version><!-- {x-version-update:proto-google-cloud-bigqueryconnection-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-bigqueryconnection-v1</artifactId>
-        <version>2.1.1</version><!-- {x-version-update:grpc-google-cloud-bigqueryconnection-v1:current} -->
+        <version>2.1.2</version><!-- {x-version-update:grpc-google-cloud-bigqueryconnection-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-bigqueryconnection-v1beta1</artifactId>
-        <version>0.9.1</version><!-- {x-version-update:proto-google-cloud-bigqueryconnection-v1beta1:current} -->
+        <version>0.9.2</version><!-- {x-version-update:proto-google-cloud-bigqueryconnection-v1beta1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-bigqueryconnection-v1beta1</artifactId>
-        <version>0.9.1</version><!-- {x-version-update:grpc-google-cloud-bigqueryconnection-v1beta1:current} -->
+        <version>0.9.2</version><!-- {x-version-update:grpc-google-cloud-bigqueryconnection-v1beta1:current} -->
       </dependency>
 
       <dependency>
diff --git a/proto-google-cloud-bigqueryconnection-v1/pom.xml b/proto-google-cloud-bigqueryconnection-v1/pom.xml
index 6c4bbd17..9556a6c9 100644
--- a/proto-google-cloud-bigqueryconnection-v1/pom.xml
+++ b/proto-google-cloud-bigqueryconnection-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-bigqueryconnection-v1</artifactId>
-  <version>2.1.1</version><!-- {x-version-update:proto-google-cloud-bigqueryconnection-v1:current} -->
+  <version>2.1.2</version><!-- {x-version-update:proto-google-cloud-bigqueryconnection-v1:current} -->
   <name>proto-google-cloud-bigqueryconnection-v1</name>
   <description>PROTO library for proto-google-cloud-bigqueryconnection-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-bigqueryconnection-parent</artifactId>
-    <version>2.1.1</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
+    <version>2.1.2</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/proto-google-cloud-bigqueryconnection-v1beta1/pom.xml b/proto-google-cloud-bigqueryconnection-v1beta1/pom.xml
index 1e06aad4..86bb24dc 100644
--- a/proto-google-cloud-bigqueryconnection-v1beta1/pom.xml
+++ b/proto-google-cloud-bigqueryconnection-v1beta1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-bigqueryconnection-v1beta1</artifactId>
-  <version>0.9.1</version><!-- {x-version-update:proto-google-cloud-bigqueryconnection-v1beta1:current} -->
+  <version>0.9.2</version><!-- {x-version-update:proto-google-cloud-bigqueryconnection-v1beta1:current} -->
   <name>proto-google-cloud-bigqueryconnection-v1beta1</name>
   <description>PROTO library for proto-google-cloud-bigqueryconnection-v1beta1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-bigqueryconnection-parent</artifactId>
-    <version>2.1.1</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
+    <version>2.1.2</version><!-- {x-version-update:google-cloud-bigqueryconnection:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/samples/install-without-bom/pom.xml b/samples/install-without-bom/pom.xml
index c9fbce79..5cb5eee4 100644
--- a/samples/install-without-bom/pom.xml
+++ b/samples/install-without-bom/pom.xml
@@ -36,7 +36,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <version>3.17.3</version>
+      <version>3.18.0</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index 3116705f..70dff72f 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -28,14 +28,14 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-bigqueryconnection</artifactId>
-      <version>2.1.1</version>
+      <version>2.1.2</version>
     </dependency>
     <!-- {x-version-update-end} -->
 
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <version>3.17.3</version>
+      <version>3.18.0</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
diff --git a/samples/snippets/pom.xml b/samples/snippets/pom.xml
index 4ef09d7a..6d573455 100644
--- a/samples/snippets/pom.xml
+++ b/samples/snippets/pom.xml
@@ -46,7 +46,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <version>3.17.3</version>
+      <version>3.18.0</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
diff --git a/versions.txt b/versions.txt
index a97c0413..d1a84060 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,8 +1,8 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-bigqueryconnection:2.1.1:2.1.1
-grpc-google-cloud-bigqueryconnection-v1:2.1.1:2.1.1
-grpc-google-cloud-bigqueryconnection-v1beta1:0.9.1:0.9.1
-proto-google-cloud-bigqueryconnection-v1:2.1.1:2.1.1
-proto-google-cloud-bigqueryconnection-v1beta1:0.9.1:0.9.1
+google-cloud-bigqueryconnection:2.1.2:2.1.2
+grpc-google-cloud-bigqueryconnection-v1:2.1.2:2.1.2
+grpc-google-cloud-bigqueryconnection-v1beta1:0.9.2:0.9.2
+proto-google-cloud-bigqueryconnection-v1:2.1.2:2.1.2
+proto-google-cloud-bigqueryconnection-v1beta1:0.9.2:0.9.2