diff --git a/pom.xml b/pom.xml
index 9fd0f123b..6ec921f2c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -157,7 +157,7 @@
     <google.common-protos.version>1.17.0</google.common-protos.version>
     <gax.version>1.53.1</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>
     <guava.version>28.2-android</guava.version>
     <threeten.version>1.4.1</threeten.version>