diff --git a/io-study-demo/pom.xml b/io-study-demo/pom.xml
index 8ae410f..22b0d24 100644
--- a/io-study-demo/pom.xml
+++ b/io-study-demo/pom.xml
@@ -22,7 +22,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.11</version>
+      <version>4.13.1</version>
       <scope>test</scope>
     </dependency>
   </dependencies>