diff --git a/spack.yaml b/spack.yaml
index f51036c5480bdd27c0a290f60b0ffa0055c2319b..b800f7712a6b7092040ed02fe11c970fd530f733 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -27,7 +27,7 @@ spack:
     - pythia8@8.306 +fastjet
     - python@3.9.7
     - py-numpy@1.21.3
-    - py-pip@20.2
+    - py-pip@21.1.2
     - qt +opengl
     - root@6.24.06 cxxstd=17 
           +fftw +fortran +gdml +http +mlp +pythia8