diff --git a/samples/install-without-bom/pom.xml b/samples/install-without-bom/pom.xml
index baf8398c..791485be 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>3.15.5</version>
+      <version>3.15.6</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index 026f04d3..fc385abe 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -34,7 +34,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <version>3.15.5</version>
+      <version>3.15.6</version>
     </dependency>
 
     <dependency>
diff --git a/samples/snippets/pom.xml b/samples/snippets/pom.xml
index 2f76e67f..5b866db7 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>3.15.5</version>
+      <version>3.15.6</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>