diff --git a/java/pom.xml b/java/pom.xml
index 7089993a..6976fd9b 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -20,7 +20,7 @@
   <properties>
     <google-api-client.version>1.23.0</google-api-client.version>
     <guava.version>21.0</guava.version>
-    <protobuf-java.version>3.4.0</protobuf-java.version>
+    <protobuf-java.version>3.16.3</protobuf-java.version>
     <appengine.target.version>[1.9.1,2.0)</appengine.target.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>