diff --git a/mars-common/pom.xml b/mars-common/pom.xml
index 67457e5..92fad35 100644
--- a/mars-common/pom.xml
+++ b/mars-common/pom.xml
@@ -2,13 +2,12 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
     <parent>
         <artifactId>Mars</artifactId>
         <groupId>com.github.yuyenews</groupId>
         <version>3.0.18</version>
     </parent>
-    <modelVersion>4.0.0</modelVersion>
-
     <artifactId>mars-common</artifactId>
 
     <dependencies>