diff --git a/simple-raft/pom.xml b/simple-raft/pom.xml
index 1de92ce..366e779 100644
--- a/simple-raft/pom.xml
+++ b/simple-raft/pom.xml
@@ -16,7 +16,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.13.0</version>
+            <version>3.16.3</version>
         </dependency>
 
         <dependency>