diff --git a/pom.xml b/pom.xml
index fc15d6c..046af6c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -132,7 +132,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.4.0</version>
+            <version>3.16.3</version>
         </dependency>
 
         <!-- junit -->