diff --git a/structure-learn/serialization-learn/pom.xml b/structure-learn/serialization-learn/pom.xml
index cf805a8..2cba234 100644
--- a/structure-learn/serialization-learn/pom.xml
+++ b/structure-learn/serialization-learn/pom.xml
@@ -37,7 +37,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.4.0</version>
+            <version>3.16.1</version>
         </dependency>
         <dependency>
             <groupId>junit</groupId>