diff --git a/spack.yaml b/spack.yaml
index 70782a923df70bc4c37fede504eb00f6f9350e8b..5528079d6df34a2f6bdf4976277df047cf85d1b3 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -25,7 +25,7 @@ spack:
     - pkg-config@0.29.2
     - podio@0.14 build_type=RelWithDebInfo
     - pythia8@8.306 +fastjet
-    - python@3.9.6
+    - python@3.9.7
     - py-numpy@1.20.1
     - py-pip@20.2
     - qt +opengl