diff --git a/docs/docs/markdown.md b/docs/docs/markdown.md
index 7eb433ef87e..5744afb7216 100644
--- a/docs/docs/markdown.md
+++ b/docs/docs/markdown.md
@@ -329,7 +329,7 @@ There are plenty of other diagrams supported by PlantUML such as:
 
 * [Sequence diagram](http://plantuml.com/sequence-diagram)
 * [Use Case diagram](http://plantuml.com/use-case-diagram)
-* [Class diagram](http://plantuml.com/activity-diagram-beta)
+* [Class diagram](http://plantuml.com/class-diagram)
 * [Activity diagram](http://plantuml.com/activity-diagram-beta)
 * [Component diagram](http://plantuml.com/component-diagram)
 * [State diagram](http://plantuml.com/state-diagram)