Update README.md

Author: metazip

README.md

@@ -78,7 +78,7 @@ Oral History of John Backus
 - to FL: [PLaSM](http://www.dia.uniroma3.it/~paoluzzi/plasm/download/) and [Docs](http://www.dia.uniroma3.it/~paoluzzi/plasm/docs/) and Book: [Introduction to FL and PLaSM](https://media.johnwiley.com.au/product_data/excerpt/29/04718994/0471899429.pdf)
 - [FP-Interpreter](https://pointfree-interpreter.github.io/) in Delphi and in Lazarus
 - Pointfrip [Calculator](https://github.com/pointfrip/calculator) for Android, (Engish and German help)
-- Executable implementation of [Joy](https://github.com/Wodan58/Joy) and subset of Joy for graphics programming [mjoy](https://github.com/fpstefan/mjoy)
+- Executable implementation of [Joy](https://github.com/Wodan58/Joy) and subset of Joy for graphics programming [mjoy](https://github.com/metazip/mjoy)
 
 ### Some Link Collections
 - [Link-Sammlung-1](https://flinks-72c22.firebaseapp.com/)