diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 56e834d9bf80929a78295363bd955c3bdef438a4..d6823668939356d5a990ca335328146875869833 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -230,7 +230,7 @@ packages:
     - +fastjet +root
   python:
     require:
-    - '@3.11.6'
+    - '@3.10.13'
   py-awkward:
     require:
     - '@2.1.1'