diff --git a/proto/pom.xml b/proto/pom.xml
old mode 100755
new mode 100644
index 8da16f4..97ef02d
--- a/proto/pom.xml
+++ b/proto/pom.xml
@@ -30,7 +30,7 @@
 		<!-- gRPC -->
 		<grpc.version>1.3.1</grpc.version>
 		<!-- ProtoBuf -->
-		<protobuf.version>3.4.0</protobuf.version>
+		<protobuf.version>3.16.1</protobuf.version>
 		<!-- Googleapis -->
 		<googleapis.version>0.0.3</googleapis.version>