diff --git a/tutorial/networking/basic/pingpong/pom.xml b/tutorial/networking/basic/pingpong/pom.xml
index 45a1424..6fdd582 100644
--- a/tutorial/networking/basic/pingpong/pom.xml
+++ b/tutorial/networking/basic/pingpong/pom.xml
@@ -51,7 +51,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.2.3</version>
+            <version>1.2.13</version>
             <scope>compile</scope>
         </dependency>
     </dependencies>