diff --git a/libraries/enc-client/pom.xml b/libraries/enc-client/pom.xml
index 6ba47d029..11c478a3d 100644
--- a/libraries/enc-client/pom.xml
+++ b/libraries/enc-client/pom.xml
@@ -101,7 +101,7 @@
     <dependency>
       <groupId>ch.qos.logback</groupId>
       <artifactId>logback-core</artifactId>
-      <version>1.1.11</version>
+      <version>1.5.20</version>
     </dependency>
   </dependencies>
   <repositories>