diff --git a/README.md b/README.md
index 5997036f..ed464828 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # rusty_snek_gaem
 
 this is a wip version of the snake game in rust
+based on guide `https://www.youtube.com/watch?v=HCwMb0KslX8`
 
 Intructions
 ```