diff --git a/m7-exercise-files/demos/02_course_demo/VacationTrackerBatch/pom.xml b/m7-exercise-files/demos/02_course_demo/VacationTrackerBatch/pom.xml
old mode 100755
new mode 100644
index d606236..b14d290
--- a/m7-exercise-files/demos/02_course_demo/VacationTrackerBatch/pom.xml
+++ b/m7-exercise-files/demos/02_course_demo/VacationTrackerBatch/pom.xml
@@ -19,7 +19,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.1.7</version>
+            <version>1.2.0</version>
         </dependency>
         <dependency>
           <groupId>io.grpc</groupId>