diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 6a413cbd478f686bb00be9301a04bcb3e4320e43..84dab004f8bc9d280ea0ec9bc505874774aede2b 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'