diff --git a/java-bigqueryconnection/samples/install-without-bom/pom.xml b/java-bigqueryconnection/samples/install-without-bom/pom.xml
index 1309c3fe6c91..1f5919aa22f2 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>3.21.3</version>
+      <version>3.21.4</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
diff --git a/java-bigqueryconnection/samples/snapshot/pom.xml b/java-bigqueryconnection/samples/snapshot/pom.xml
index 44e4d2bc0c68..32d62f341ba2 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>3.21.3</version>
+      <version>3.21.4</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
diff --git a/java-bigqueryconnection/samples/snippets/pom.xml b/java-bigqueryconnection/samples/snippets/pom.xml
index cc7e14029b37..1dd64fbab0ff 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>3.21.3</version>
+      <version>3.21.4</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>