diff --git a/source code/pq-service/pom.xml b/source code/pq-service/pom.xml
index e928cec..e48e5fc 100644
--- a/source code/pq-service/pom.xml	
+++ b/source code/pq-service/pom.xml	
@@ -134,7 +134,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-core</artifactId>
-            <version>1.2.3</version>
+            <version>1.2.13</version>
         </dependency>
     </dependencies>