diff --git a/part01-Part01_13.DoubleInput/pom.xml b/part01-Part01_13.DoubleInput/pom.xml
index 4202342..e3c224f 100644
--- a/part01-Part01_13.DoubleInput/pom.xml
+++ b/part01-Part01_13.DoubleInput/pom.xml
@@ -17,7 +17,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>