diff --git a/riemann-java-client/pom.xml b/riemann-java-client/pom.xml
index 738697c..0c79e22 100644
--- a/riemann-java-client/pom.xml
+++ b/riemann-java-client/pom.xml
@@ -34,7 +34,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.16.3</version>
+            <version>3.25.5</version>
             <scope>compile</scope>
         </dependency>