diff --git a/metadata/pom.xml b/metadata/pom.xml
index 4781c3baf..c6a43c34f 100644
--- a/metadata/pom.xml
+++ b/metadata/pom.xml
@@ -108,7 +108,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
-      <version>3.16.3</version>
+      <version>3.21.7</version>
     </dependency>
 
     <!-- https://mvnrepository.com/artifact/com.google.auto.value/auto-value -->
diff --git a/tools/java/cpp-build/pom.xml b/tools/java/cpp-build/pom.xml
index 816c13679..085d0f7da 100644
--- a/tools/java/cpp-build/pom.xml
+++ b/tools/java/cpp-build/pom.xml
@@ -154,7 +154,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
-      <version>3.16.3</version>
+      <version>3.21.7</version>
     </dependency>
   </dependencies>