diff --git a/pom.xml b/pom.xml
index 4b7dd60c5d..ca6ffd57c0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -159,7 +159,7 @@
     <google.api.version>2.0.0</google.api.version>
     <google.http.version>1.42.2</google.http.version>
     <grpc.version>1.49.0</grpc.version>
-    <protobuf.version>3.21.5</protobuf.version>
+    <protobuf.version>3.21.6</protobuf.version>
     <opencensus.version>0.31.1</opencensus.version>
     <annotations-api.version>1.3.2</annotations-api.version>
     <guava.version>31.1-jre</guava.version>