diff --git a/spack.yaml b/spack.yaml
index 2991a7c2d572dcca94a79ccfe461f864444fd6bc..d87ce00d702bbacd707ae55ac3e1c3c052dffbb7 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -31,5 +31,6 @@ spack:
     - dawn@3_91a
     - dawncut@1_54a
     - opencascade@7.4.0p1
+    - emacs@27.0:27.99 toolkit=athena
   concretization: together
   view: /usr/local