diff --git a/.all-contributorsrc b/.all-contributorsrc
index 5ccb93d..c628fe4 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -104,7 +104,8 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/16874978?v=4",
       "profile": "https://github.com/chendingyan",
       "contributions": [
-        "bug"
+        "bug",
+        "code"
       ]
     }
   ],
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 1a108fd..b539173 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -19,7 +19,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   <tr>
     <td align="center"><a href="https://www.linkedin.com/in/tczhao/"><img src="https://avatars.githubusercontent.com/u/20961507?v=4?s=100" width="100px;" alt=""/><br /><sub><b>tczhao</b></sub></a><br /><a href="https://github.com/LAMDA-NJU/Deep-Forest/commits?author=tczhao" title="Code">💻</a> <a href="https://github.com/LAMDA-NJU/Deep-Forest/commits?author=tczhao" title="Documentation">📖</a> <a href="https://github.com/LAMDA-NJU/Deep-Forest/commits?author=tczhao" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://github.com/zhenlingcn"><img src="https://avatars.githubusercontent.com/u/18747119?v=4?s=100" width="100px;" alt=""/><br /><sub><b>zhenlingcn</b></sub></a><br /><a href="https://github.com/LAMDA-NJU/Deep-Forest/issues?q=author%3Azhenlingcn" title="Bug reports">🐛</a></td>
-    <td align="center"><a href="https://github.com/chendingyan"><img src="https://avatars.githubusercontent.com/u/16874978?v=4?s=100" width="100px;" alt=""/><br /><sub><b>陈鼎彦</b></sub></a><br /><a href="https://github.com/LAMDA-NJU/Deep-Forest/issues?q=author%3Achendingyan" title="Bug reports">🐛</a></td>
+    <td align="center"><a href="https://github.com/chendingyan"><img src="https://avatars.githubusercontent.com/u/16874978?v=4?s=100" width="100px;" alt=""/><br /><sub><b>陈鼎彦</b></sub></a><br /><a href="https://github.com/LAMDA-NJU/Deep-Forest/issues?q=author%3Achendingyan" title="Bug reports">🐛</a> <a href="https://github.com/LAMDA-NJU/Deep-Forest/commits?author=chendingyan" title="Code">💻</a></td>
   </tr>
 </table>