diff --git a/java-bigqueryconnection/samples/install-without-bom/pom.xml b/java-bigqueryconnection/samples/install-without-bom/pom.xml
index 25d300e138e7..9ac4b4cdcded 100644
--- a/java-bigqueryconnection/samples/install-without-bom/pom.xml
+++ b/java-bigqueryconnection/samples/install-without-bom/pom.xml
@@ -36,7 +36,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <version>3.21.1</version>
+      <version>3.21.2</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
diff --git a/java-bigqueryconnection/samples/snapshot/pom.xml b/java-bigqueryconnection/samples/snapshot/pom.xml
index e74a11ccd60a..1f09663efbde 100644
--- a/java-bigqueryconnection/samples/snapshot/pom.xml
+++ b/java-bigqueryconnection/samples/snapshot/pom.xml
@@ -35,7 +35,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <version>3.21.1</version>
+      <version>3.21.2</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
diff --git a/java-bigqueryconnection/samples/snippets/pom.xml b/java-bigqueryconnection/samples/snippets/pom.xml
index d45be7f6b631..c26d3c7642c0 100644
--- a/java-bigqueryconnection/samples/snippets/pom.xml
+++ b/java-bigqueryconnection/samples/snippets/pom.xml
@@ -46,7 +46,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <version>3.21.1</version>
+      <version>3.21.2</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>