diff --git a/MAPPING.md b/MAPPING.md
index d6c0a1f..9e5b206 100644
--- a/MAPPING.md
+++ b/MAPPING.md
@@ -29,9 +29,9 @@ QQ群:1022221898
 
 ### 使用
 
-* mapper继承MPJBaseMapper (必选)
-* service继承MPJBaseService (可选)
-* serviceImpl继承MPJBaseServiceImpl (可选)
+* mapper继承MPJBaseMapper
+* service继承MPJBaseService
+* serviceImpl继承MPJBaseServiceImpl
 
 #### @MPJMapping注解