diff --git a/pom.xml b/pom.xml
index fe53985..972d849 100644
--- a/pom.xml
+++ b/pom.xml
@@ -118,7 +118,7 @@
 		<dependency>
 			<groupId>com.google.protobuf</groupId>
 			<artifactId>protobuf-java</artifactId>
-    		<version>4.0.0-rc-2</version>
+    		<version>3.21.2</version>
 		</dependency>
 	</dependencies>
 	<repositories>