diff --git a/src/data/roadmaps/angular/content/100-typescript-basics/104-union-types.md b/src/data/roadmaps/angular/content/100-typescript-basics/104-union-types.md
index ec65e2baa..6ac053e0f 100644
--- a/src/data/roadmaps/angular/content/100-typescript-basics/104-union-types.md
+++ b/src/data/roadmaps/angular/content/100-typescript-basics/104-union-types.md
@@ -6,3 +6,4 @@ Visit the following resources to learn more:
 
 - [Union Types - typescriptlang](https://www.typescriptlang.org/docs/handbook/unions-and-intersections.html)
 - [Union Type video for Beginners](https://www.youtube.com/watch?v=uxjpm4W5pCo)
+- [Union Types - typescriptlang](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#union-types)
\ No newline at end of file