diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index ab9c980c8..32a6745f0 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -49,3 +49,4 @@ List of Contributors
   - Masaaki is the initial creator of xgboost python plotting module.
 * [Hongliang Liu](https://github.com/phunterlau)
   - Hongliang is the maintainer of xgboost python PyPI package for pip installation.
+* [Huayi Zhang](https://github.com/irachex)