diff --git a/heterogeneous_data/introduction.md b/heterogeneous_data/introduction.md
index 0f50d039df827770f44ceff28d2df0baa43e31a8..eeb18079abf12d5e08be03445caa9f4768101292 100644
--- a/heterogeneous_data/introduction.md
+++ b/heterogeneous_data/introduction.md
@@ -4,7 +4,7 @@ This lecture aims at covering the statistical background required to perform ass
 
 Links:
 
-- [Presentation material](https://marcolorenzi.github.io/material/winter_school/Imaging-Genetics-winter_school_Verona_2019_compressed.pdf).   
+- [Presentation material](https://marcolorenzi.github.io/material/AI4Health_winter_school_part1.pptx).   
 
 - [Colab Notebook](https://colab.research.google.com/drive/1FNDpXdc_U_UCEabCeXUWjLKOZT8gutJg).