diff --git a/csc/2016/cmo/cmo_1_java/pom.xml b/csc/2016/cmo/cmo_1_java/pom.xml
index 93bc6891e..31b9171e4 100644
--- a/csc/2016/cmo/cmo_1_java/pom.xml
+++ b/csc/2016/cmo/cmo_1_java/pom.xml
@@ -25,7 +25,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>2.6.1</version>
+            <version>3.16.1</version>
         </dependency>
     </dependencies>