diff --git a/Day09MapReduceCase/MapReduceCase/pom.xml b/Day09MapReduceCase/MapReduceCase/pom.xml
index 1d77c15..2f4f5dd 100644
--- a/Day09MapReduceCase/MapReduceCase/pom.xml
+++ b/Day09MapReduceCase/MapReduceCase/pom.xml
@@ -12,7 +12,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
 
@@ -40,7 +40,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.1</version>
             <scope>compile</scope>
         </dependency>
     </dependencies>