diff --git a/pom.xml b/pom.xml
old mode 100755
new mode 100644
index 7646b48..e2ff7c8
--- a/pom.xml
+++ b/pom.xml
@@ -34,7 +34,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.6.1</version>
+            <version>3.16.3</version>
         </dependency>
         <dependency>
             <groupId>org.bouncycastle</groupId>