diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 97da78b70..27ad42de1 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -573,7 +573,7 @@ packages:
     - hepmc=3 plugin-match=HERA,LEP,MC
   root:
     require:
-    - '@6.38.00'
+    - '@6.38.04'
     - cxxstd=20 +fftw +fortran +gdml +http -ipo +mlp +python +root7 +tmva +tmva-sofie +x +xrootd +ssl
     - any_of: [+opengl +webgui, -opengl -webgui]
   sherpa: