diff --git a/ratpack/pom.xml b/ratpack/pom.xml
index d61be6f..ee0283d 100644
--- a/ratpack/pom.xml
+++ b/ratpack/pom.xml
@@ -22,7 +22,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.9</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
     </dependencies>