diff --git a/mahjong-lucene4/pom.xml b/mahjong-lucene4/pom.xml
index fd432aa..337f8fb 100644
--- a/mahjong-lucene4/pom.xml
+++ b/mahjong-lucene4/pom.xml
@@ -63,7 +63,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.7</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
     </dependencies>