diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 40ffec448ca8..f5fd3b4ebb11 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -66,7 +66,7 @@ Guidelines for bug reports:
    latest `master` or development branch in the repository.
 
 3. **Isolate the problem** — ideally create a [reduced test
-   case](http://css-tricks.com/6263-reduced-test-cases/) and a live example.
+   case](https://css-tricks.com/reduced-test-cases/) and a live example.
    [This JS Bin](http://jsbin.com/lefey/1/edit?html,output) is a helpful template.