diff --git a/whatsmars-tomcat/pom.xml b/whatsmars-tomcat/pom.xml
index 794570757cc63e7028ffaf9eae36e4634728c1d5..8a8e2a50795692e8656eb053e4573e944697ce40 100644
--- a/whatsmars-tomcat/pom.xml
+++ b/whatsmars-tomcat/pom.xml
@@ -21,11 +21,7 @@
             <artifactId>javax.servlet-api</artifactId>
             <version>3.0.1</version>
         </dependency>
-        <dependency>
-            <groupId>redis.clients</groupId>
-            <artifactId>jedis</artifactId>
-            <version>2.8.0</version>
-        </dependency>
+        <!-- 以下依赖纯粹是为了研究源码 -->
         <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-core</artifactId>
@@ -34,13 +30,13 @@
         <dependency>
             <groupId>org.apache.tomcat</groupId>
             <artifactId>tomcat-catalina</artifactId>
-            <version>7.0.57</version>
+            <version>9.0.0.M27</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>org.apache.tomcat</groupId>
             <artifactId>tomcat-coyote</artifactId>
-            <version>7.0.57</version>
+            <version>9.0.0.M27</version>
             <scope>provided</scope>
         </dependency>
     </dependencies>