diff --git a/pom.xml b/pom.xml
index be31212a..1230f89f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -70,7 +70,7 @@
     <google.http-client.version>1.34.1</google.http-client.version>
     <gax.version>1.53.0</gax.version>
     <grpc.version>1.27.0</grpc.version>
-    <protobuf.version>3.11.1</protobuf.version>
+    <protobuf.version>3.11.3</protobuf.version>
     <junit.version>4.13</junit.version>
     <easymock.version>3.6</easymock.version>
     <guava.version>28.2-android</guava.version>