diff --git a/pom.xml b/pom.xml
index f7c7a8e..167d6ef 100644
--- a/pom.xml
+++ b/pom.xml
@@ -100,7 +100,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.19.3</version>
+            <version>3.21.5</version>
         </dependency>
         <dependency>
             <groupId>org.java-websocket</groupId>