diff --git a/samples/install-without-bom/pom.xml b/samples/install-without-bom/pom.xml
index 45e61f94d..2df93f5e4 100644
--- a/samples/install-without-bom/pom.xml
+++ b/samples/install-without-bom/pom.xml
@@ -18,7 +18,7 @@
   </parent>
 
   <properties>
-    <project.protobuf-java.version>3.25.8</project.protobuf-java.version>
+    <project.protobuf-java.version>4.31.1</project.protobuf-java.version>
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index d6cc8fb6a..eb451acde 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -18,7 +18,7 @@
   </parent>
 
   <properties>
-    <project.protobuf-java.version>3.25.8</project.protobuf-java.version>
+    <project.protobuf-java.version>4.31.1</project.protobuf-java.version>
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
diff --git a/samples/snippets/pom.xml b/samples/snippets/pom.xml
index a11e9a9f2..a182e05c0 100644
--- a/samples/snippets/pom.xml
+++ b/samples/snippets/pom.xml
@@ -18,7 +18,7 @@
   </parent>
 
   <properties>
-    <project.protobuf-java.version>3.25.8</project.protobuf-java.version>
+    <project.protobuf-java.version>4.31.1</project.protobuf-java.version>
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>