diff --git a/samples/install-without-bom/pom.xml b/samples/install-without-bom/pom.xml
index a560b2282..8ccf1a1a1 100644
--- a/samples/install-without-bom/pom.xml
+++ b/samples/install-without-bom/pom.xml
@@ -41,7 +41,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <version>3.15.5</version>
+      <version>3.15.6</version>
     </dependency>
   </dependencies>
 
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index 37091b3fc..941aeff8b 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -39,7 +39,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <version>3.15.5</version>
+      <version>3.15.6</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>