diff --git a/environments/key4hep-common/packages.yaml b/environments/key4hep-common/packages.yaml
index 69587c5d..e2ffc74b 100644
--- a/environments/key4hep-common/packages.yaml
+++ b/environments/key4hep-common/packages.yaml
@@ -53,6 +53,8 @@ packages:
   xrootd:
     require: +krb5 cxxstd=20
 
+  fmt:
+    require: "@:10"
   # Use the system OpenGL as recommended by spack
   # See https://github.com/key4hep/key4hep-spack/issues/318 and
   # https://github.com/key4hep/key4hep-spack/issues/516