diff --git a/environment.yml b/environment.yml
index 1803cf3867611a19994560f8a312ec333ab5d5c5..b93c111c13c3a64e7c3b71c0077ef1a9824fb6c2 100644
--- a/environment.yml
+++ b/environment.yml
@@ -6,7 +6,7 @@ dependencies:
   - matplotlib
   - notebook=6.4.3
   - numpy
-  - python=3.9
+  - python=3.9.20
   - rise=5.7.1
   - scipy
   - voila=0.5.7