diff --git a/monitoring-playground/pom.xml b/monitoring-playground/pom.xml
old mode 100755
new mode 100644
index cc42093..505b937
--- a/monitoring-playground/pom.xml
+++ b/monitoring-playground/pom.xml
@@ -19,7 +19,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>3.8.1</version>
+      <version>4.13.1</version>
       <scope>test</scope>
     </dependency>