diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 91ad3df0e746c7b0c6be0d449130b26a7d420124..a4737c1d155c2ec95c3375fd3388f21dc3cc238d 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -234,7 +234,7 @@ packages:
     - +fastjet +root
   python:
     require:
-    - '@3.11.6'
+    - '@3.10.13'
   py-awkward:
     require:
     - '@2.1.1'