diff --git a/pom.xml b/pom.xml
old mode 100755
new mode 100644
index 4cd098b..e9409b1
--- a/pom.xml
+++ b/pom.xml
@@ -40,7 +40,7 @@
     <dependency> 
       <groupId>com.google.protobuf</groupId>  
       <artifactId>protobuf-java</artifactId>  
-      <version>2.4.1</version> 
+      <version>3.16.3</version> 
     </dependency>  
     <dependency> 
       <groupId>org.apache.httpcomponents</groupId>