diff --git a/7-animation/2-css-animations/article.md b/7-animation/2-css-animations/article.md
index a19c0a46..36b280f5 100644
--- a/7-animation/2-css-animations/article.md
+++ b/7-animation/2-css-animations/article.md
@@ -76,7 +76,7 @@ Now, let's cover animation properties one by one.
 
 In `transition-property`, we write a list of properties to animate, for instance: `left`, `margin-left`, `height`, `color`. Or we could write `all`, which means "animate all properties".
 
-Not all properties can be animated, but [many of them can](http://www.w3.org/TR/css3-transitions/#animatable-properties-). The value `all` means "animate all properties".
+Do note that, there are properties which can not be animated. However, [most of the generally used properties are animatable](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_animated_properties).
 
 ## transition-duration