diff --git a/slides.qmd b/slides.qmd
index 9b86864af92f1cefc5ecfea1b19fe3266516a180..8d373d6046dedea4dd067ec92f6e091380e8d943 100644
--- a/slides.qmd
+++ b/slides.qmd
@@ -190,6 +190,7 @@ name: my_env
 channels:
   - conda-forge
 dependencies:
+  - python=3.12
   - matplotlib
   - numpy
   - scipy