diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 578538c4e..b57f425d4 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -29,6 +29,10 @@ cd craft.js
 ```
 4. Submit a [pull request](https://github.com/prevwong/craft.js/compare) to merge the changes from your fork :heart:
 
+# URL
+- Production (master branch): https://craft.js.org/
+- Staging (develop branch): https://craft-js.prevwong.now.sh/
+
 # License 
 By contributing, you agree that your contributions will be licensed under MIT License.