diff --git a/concurrent/multithread-reducer/pom.xml b/concurrent/multithread-reducer/pom.xml
old mode 100755
new mode 100644
index 05a6d9e..cc2acb1
--- a/concurrent/multithread-reducer/pom.xml
+++ b/concurrent/multithread-reducer/pom.xml
@@ -13,7 +13,7 @@
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
-			<version>4.12</version>
+			<version>4.13.1</version>
 			<scope>test</scope>
 		</dependency>
 	</dependencies>