diff --git a/pom.xml b/pom.xml
index 060b747b..a298361d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -149,7 +149,7 @@
       <dependency>
         <groupId>org.slf4j</groupId>
         <artifactId>log4j-over-slf4j</artifactId>
-        <version>2.0.3</version>
+        <version>2.0.9</version>
       </dependency>
       <dependency>
         <groupId>net.sf.ehcache</groupId>