diff --git a/pom.xml b/pom.xml
index 9f0cc76bd4..9ef08e8ddd 100755
--- a/pom.xml
+++ b/pom.xml
@@ -75,7 +75,7 @@
         <mail.version>1.6.2</mail.version>
         <curator.version>4.2.0</curator.version>
         <zookeeper.version>3.5.5</zookeeper.version>
-        <protobuf.version>3.21.7</protobuf.version>
+        <protobuf.version>3.21.9</protobuf.version>
         <grpc.version>1.42.1</grpc.version>
         <lombok.version>1.18.18</lombok.version>
         <paho.client.version>1.2.4</paho.client.version>