diff --git a/m326/2a_CRC-Cards/README.md b/m326/2a_CRC-Cards/README.md
index 089a140..01c9163 100644
--- a/m326/2a_CRC-Cards/README.md
+++ b/m326/2a_CRC-Cards/README.md
@@ -2,6 +2,7 @@
 
 [**M326_Tag2_task_defining_requirementsUseCases.pdf**](./M326_Tag2_task_defining_requirementsUseCases.pdf)
 
+[https://echeung.me/crcmaker](https://echeung.me/crcmaker)
 
 - [2:49 min, E, YouTube: Using CRC-Cards](https://www.youtube.com/watch?v=Bxgn6qJ-bYY)
 - [8:59 min, E, YouTube: Class Responsibility Collaboration](https://www.youtube.com/watch?v=mbpeonZUhpU)