diff --git a/pom.xml b/pom.xml
index bb49a14..baaf5b8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -162,7 +162,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.5.16</version>
+            <version>1.5.21</version>
             <scope>test</scope>
         </dependency>
     </dependencies>