diff --git a/simulator/pom.xml b/simulator/pom.xml
index e77d47c..dc33a8b 100644
--- a/simulator/pom.xml
+++ b/simulator/pom.xml
@@ -73,7 +73,7 @@
 		<dependency>
 			<groupId>com.google.protobuf</groupId>
 			<artifactId>protobuf-java</artifactId>
-			<version>2.6.1</version>
+			<version>3.16.3</version>
 		</dependency>
   	<dependency>
 			<groupId>com.amazonaws</groupId>