diff --git a/ai-intro/pom.xml b/ai-intro/pom.xml
index bc767a8..9ad12ef 100644
--- a/ai-intro/pom.xml
+++ b/ai-intro/pom.xml
@@ -113,6 +113,6 @@
 
         <hadoop.version>2.2.0</hadoop.version>
         <arbiter.version>1.0.0-beta3</arbiter.version>
-        <logback.version>1.1.7</logback.version>
+        <logback.version>1.2.0</logback.version>
     </properties>
 </project>