diff --git a/kvs/YCSB/YCSB/mongodb/pom.xml b/kvs/YCSB/YCSB/mongodb/pom.xml
old mode 100755
new mode 100644
index b8e85dc..43caf4c
--- a/kvs/YCSB/YCSB/mongodb/pom.xml
+++ b/kvs/YCSB/YCSB/mongodb/pom.xml
@@ -50,7 +50,7 @@ LICENSE file.
     <dependency>
       <groupId>ch.qos.logback</groupId>
       <artifactId>logback-classic</artifactId>
-      <version>1.1.2</version>
+      <version>1.2.0</version>
       <scope>runtime</scope>
     </dependency>