diff --git a/doc/index.rst b/doc/index.rst
index 223f9abbd..384b3745b 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -26,6 +26,7 @@ Contents
   R package <R-package/index>
   JVM package <jvm/index>
   Ruby package <https://github.com/ankane/xgb>
+  Swift package <https://github.com/kongzii/SwiftXGBoost>
   Julia package <julia>
   C Package <c>
   C++ Interface <c++>