diff --git a/pom.xml b/pom.xml
old mode 100755
new mode 100644
index bfb5caa1ce4..1f1b4253126
--- a/pom.xml
+++ b/pom.xml
@@ -61,7 +61,7 @@
         <mail.version>1.4.3</mail.version>
         <curator.version>4.0.1</curator.version>
         <protobuf.version>3.0.2</protobuf.version>
-        <grpc.version>1.12.0</grpc.version>
+        <grpc.version>1.27.1</grpc.version>
         <lombok.version>1.16.18</lombok.version>
         <paho.client.version>1.1.0</paho.client.version>
         <netty.version>4.1.22.Final</netty.version>