diff --git a/xlcs-parent/pom.xml b/xlcs-parent/pom.xml
index 5804ed9..87cf480 100644
--- a/xlcs-parent/pom.xml
+++ b/xlcs-parent/pom.xml
@@ -38,6 +38,9 @@
         <knife4j.version>2.0.8</knife4j.version>
         <jodatime.version>2.10.1</jodatime.version>
         <xxl-job.version>2.3.0</xxl-job.version>
+        <knife4j.version>2.0.9</knife4j.version>
+        <mybatis-plus-generator.version>3.4.1</mybatis-plus-generator.version>
+        <velocity-engine-core.version>2.0</velocity-engine-core.version>
         <maven.compiler.source>8</maven.compiler.source>
         <maven.compiler.target>8</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -74,7 +77,7 @@
             <dependency>
                 <groupId>com.github.xiaoymin</groupId>
                 <artifactId>knife4j-spring-boot-starter</artifactId>
-                <version>2.0.9</version>
+                <version>${knife4j.version}</version>
             </dependency>
             <dependency>
                 <groupId>io.jsonwebtoken</groupId>
@@ -116,13 +119,13 @@
             <dependency>
                 <groupId>com.baomidou</groupId>
                 <artifactId>mybatis-plus-generator</artifactId>
-                <version>3.4.1</version>
+                <version>${mybatis-plus-generator.version}</version>
             </dependency>
 
             <dependency>
                 <groupId>org.apache.velocity</groupId>
                 <artifactId>velocity-engine-core</artifactId>
-                <version>2.0</version>
+                <version>${velocity-engine-core.version}</version>
             </dependency>
         </dependencies>
     </dependencyManagement>