diff --git a/developer/back-end/wen20200323/yuanmao/grpc-demo/pom.xml b/developer/back-end/wen20200323/yuanmao/grpc-demo/pom.xml
index 174f7da..b1e4e02 100644
--- a/developer/back-end/wen20200323/yuanmao/grpc-demo/pom.xml
+++ b/developer/back-end/wen20200323/yuanmao/grpc-demo/pom.xml
@@ -41,7 +41,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.13</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>