diff --git a/leti/0303/pia/1/NioChat/Common/pom.xml b/leti/0303/pia/1/NioChat/Common/pom.xml
index 20502722..e121a603 100644
--- a/leti/0303/pia/1/NioChat/Common/pom.xml
+++ b/leti/0303/pia/1/NioChat/Common/pom.xml
@@ -15,7 +15,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>2.6.1</version>
+            <version>3.16.3</version>
             <scope>compile</scope>
         </dependency>
     </dependencies>
diff --git a/leti/0303/pia/1/NioChat/pom.xml b/leti/0303/pia/1/NioChat/pom.xml
index b20f029d..498048ab 100644
--- a/leti/0303/pia/1/NioChat/pom.xml
+++ b/leti/0303/pia/1/NioChat/pom.xml
@@ -39,7 +39,7 @@
             <dependency>
                 <groupId>com.google.protobuf</groupId>
                 <artifactId>protobuf-java</artifactId>
-                <version>2.6.1</version>
+                <version>3.16.3</version>
                 <scope>compile</scope>
             </dependency>
             <dependency>