diff --git a/day-01/README.md b/day-01/README.md
index 75a350e..5a9f375 100644
--- a/day-01/README.md
+++ b/day-01/README.md
@@ -6,7 +6,7 @@
 ## Introductions (11:15)
 
 ## Overview of cell-based modelling (11:30)
-[[Slides]](https://docs.google.com/presentation/d/1avRdivy53g6TQEPBjYLvx7UanoQGE_1YmrbV8_h0CRQ)
+[[Slides]](https://docs.google.com/presentation/d/102lvtlj38nBbwzUOifkxOZEyYZO6PJ3EO9SDcXgupOw)
 
 ## PyChaste for cell-based modelling (13:30)
 [[Slides]](https://docs.google.com/presentation/d/1cka1iJ9jJFqy7mcWOl1Bg9BwDtNG41aB61ufJSr4Uew)