diff --git a/leti/0381/ma/1/NioChat/pom.xml b/leti/0381/ma/1/NioChat/pom.xml
index aab391cf..8aeae9db 100644
--- a/leti/0381/ma/1/NioChat/pom.xml
+++ b/leti/0381/ma/1/NioChat/pom.xml
@@ -18,7 +18,7 @@
             <dependency>
                 <groupId>com.google.protobuf</groupId>
                 <artifactId>protobuf-java</artifactId>
-                <version>3.0.0-beta-1</version>
+                <version>3.16.1</version>
                 <scope>compile</scope>
             </dependency>
         </dependencies>
diff --git a/leti/0381/ma/1/NioChat/srcClient/pom.xml b/leti/0381/ma/1/NioChat/srcClient/pom.xml
index b927794d..a0a84c9f 100644
--- a/leti/0381/ma/1/NioChat/srcClient/pom.xml
+++ b/leti/0381/ma/1/NioChat/srcClient/pom.xml
@@ -15,7 +15,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.0.0-beta-1</version>
+            <version>3.16.1</version>
             <scope>compile</scope>
         </dependency>
 		<dependency>
diff --git a/leti/0381/ma/1/NioChat/srcCommon/pom.xml b/leti/0381/ma/1/NioChat/srcCommon/pom.xml
index af6d2816..7f275427 100644
--- a/leti/0381/ma/1/NioChat/srcCommon/pom.xml
+++ b/leti/0381/ma/1/NioChat/srcCommon/pom.xml
@@ -14,7 +14,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.0.0-beta-1</version>
+            <version>3.16.1</version>
             <scope>compile</scope>
         </dependency>
     </dependencies>
diff --git a/leti/0381/ma/1/NioChat/srcServer/pom.xml b/leti/0381/ma/1/NioChat/srcServer/pom.xml
index 0fb49e32..0999f331 100644
--- a/leti/0381/ma/1/NioChat/srcServer/pom.xml
+++ b/leti/0381/ma/1/NioChat/srcServer/pom.xml
@@ -15,7 +15,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.0.0-beta-1</version>
+            <version>3.16.1</version>
             <scope>compile</scope>
         </dependency>
         <dependency>