diff --git a/README.md b/README.md
index 1eeeccab..65325e0b 100644
--- a/README.md
+++ b/README.md
@@ -185,4 +185,4 @@ Visit all declarations.
 
 MIT
 
-[Template:CSSData](https://developer.mozilla.org/en-US/docs/Template:CSSData) by Mozilla Contributors is licensed under [CC-BY-SA 2.5]
+[Template:CSSData](https://developer.mozilla.org/en-US/docs/Template:CSSData) by Mozilla Contributors is licensed under [CC-BY-SA 2.5](http://creativecommons.org/licenses/by-sa/2.5/)