diff --git a/approvaltests/pom.xml b/approvaltests/pom.xml
index 3ce62ab8..76e8207a 100644
--- a/approvaltests/pom.xml
+++ b/approvaltests/pom.xml
@@ -64,7 +64,7 @@
         <dependency>
             <groupId>org.codehaus.jettison</groupId>
             <artifactId>jettison</artifactId>
-            <version>1.5.5</version>
+            <version>1.5.6</version>
             <optional>true</optional>
         </dependency>
         <dependency>