diff --git a/.document b/.document
index 7d4dc02d4ad502..8132b7e6f0690b 100644
--- a/.document
+++ b/.document
@@ -46,6 +46,8 @@ NEWS.md
 README.md
 README.ja.md
 
+CONTRIBUTING.md
+
 COPYING
 COPYING.ja
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 13df6087cad9b6..9f5423c404c85e 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1 +1,2 @@
-See ["Contributing to Ruby"](https://docs.ruby-lang.org/en/master/contributing_md.html), which includes setup and build instructions.
+See ["Contributing to Ruby"](https://docs.ruby-lang.org/en/master/contributing/contributing_md.html),
+which includes setup and build instructions.