diff --git a/spack-environment/dev/spack.yaml b/spack-environment/dev/spack.yaml
index 80c8c51b67c0cb9363949e8815565693cc09a3d5..daec4b36b2037fbe6775dbebd6a75553be2b2c97 100644
--- a/spack-environment/dev/spack.yaml
+++ b/spack-environment/dev/spack.yaml
@@ -27,7 +27,7 @@ spack:
     - fmt@9.1.0 +shared cxxstd=17
     - gaudi@36.10 +aida
     - geant4@11.1.1 cxxstd=17 +opengl -vecgeom +x11 +qt +threads
-    - hepmc3@3.2.5 +python +rootio
+    - hepmc3@3.2.6 +python +rootio
     - heppdt@2.06.01
     - imagemagick@7.0.8-7
     - intel-tbb@2020.3