diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 3b72f5a2a8a2171b5a8b725d57226a5b0e0343d9..035faaa5ac08a2a5e4e72f3a842b9dac640cc4dd 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -233,7 +233,7 @@ packages:
     - +plot
   pythia8:
     require:
-    - '@8.310'
+    - '@8.311'
     - +fastjet +root
   python:
     require: