diff --git a/code/dudu/pom.xml b/code/dudu/pom.xml
index 1a64fe9..13eb217 100644
--- a/code/dudu/pom.xml
+++ b/code/dudu/pom.xml
@@ -19,7 +19,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <junit.version>4.12</junit.version>
+        <junit.version>4.13.1</junit.version>
         <log4j.version>1.2.17</log4j.version>
         <lombok.version>1.16.18</lombok.version>
         <mysql.version>5.1.47</mysql.version>