diff --git a/pom.xml b/pom.xml
index 1c2b948..ba64972 100644
--- a/pom.xml
+++ b/pom.xml
@@ -70,7 +70,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-core</artifactId>
-            <version>1.2.3</version>
+            <version>1.2.9</version>
         </dependency>
         <dependency>
             <groupId>org.javassist</groupId>