diff --git a/spack.yaml b/spack.yaml
index 10d66c7baec7a1ac3cd299f27d05d78eab36e3d0..8d1ade802eed3e36797ac8a181e71660f1ea22d9 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -20,7 +20,7 @@ spack:
   - pkgs:
     # some EBRAINS-related simulators
     - py-numpy ^python@3.8.10 
-    #- py-scipy ^python@3.8.10 
+    - py-scipy ^python@3.8.10 
     #- py-pip ^python@3.8.10 
     #- nest +gsl +python ^python@3.8.10 %gcc@9.3.1
     #- arbor ^python@3.8.10