diff --git a/pom.xml b/pom.xml
index 279b720a..73b40ddb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -91,8 +91,8 @@
         <testng.version>6.8</testng.version>
         <pegdown.version>1.6.0</pegdown.version>
         <scalatest.version>3.0.3</scalatest.version>
-        <grpc.version>1.7.1</grpc.version>
-        <netty.handler.version>4.1.16.Final</netty.handler.version>
+        <grpc.version>1.27.1</grpc.version>
+        <netty.handler.version>4.1.45.Final</netty.handler.version>
         <scoverage.plugin.version>1.3.0</scoverage.plugin.version>
         <scalastyle.config.location>${basedir}/../checkstyles/scalastyle_config.xml</scalastyle.config.location>
         <maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>