diff --git a/stringtools/pom.xml b/stringtools/pom.xml
index 68264f9..b824846 100644
--- a/stringtools/pom.xml
+++ b/stringtools/pom.xml
@@ -18,7 +18,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.8.1</version>
+      <version>4.13.1</version>
       <scope>test</scope>
     </dependency>
   </dependencies>