killbill-aplcache

diff --git a/overdue/pom.xml b/overdue/pom.xml
index 4fdd4e5..c893f83 100644
--- a/overdue/pom.xml
+++ b/overdue/pom.xml
@@ -56,6 +56,11 @@
             <artifactId>testng</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <scope>test</scope>
+        </dependency>
 
         <dependency>
             <groupId>com.ning.billing</groupId>