diff --git a/README.md b/README.md
index fddd185..38adf59 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 * Prism 8 support NET 5 and dotnet Framework. Prism 6.x and below only DotNet Framework 4.8 and below.
 
 ## Legacy Documentation
-- [Prism 4 Demo](https://www.codeproject.com/Articles/254120/Prism-4-MEF-Application)
+- [Prism 4 Demo](https://www.codeproject.com/Articles/254120/Prism-4-MEF-Application). Migrated to Prism 6 [link](http://dev.mitech.com.sg:3000/playground/prism4-demo)
 - [Prism 5](https://www.microsoft.com/en-sg/download/details.aspx?id=42572)
 - Another nice [link](https://www.cnblogs.com/DoubleChen/p/3687305.html)
 - Nuget : [Prism 4.1](https://www.nuget.org/packages/prism/4.1.0)