diff --git a/spack.yaml b/spack.yaml
index c3e80f97f08b392fe2b3a0996834f4404b6556a7..7dd65f5aa45da1d6af5ad0d9da25ac2fa164e486 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -3,7 +3,7 @@ spack:
     # system
     - autoconf@2.70 %gcc@10.3.0
     # Notebook
-    - py-jupyter %gcc@10.3.0
+    - py-jupyter ^autoconf@2.70 %gcc@10.3.0
     - py-ipython %gcc@10.3.0
     - py-ipykernel %gcc@10.3.0
     - py-notebook %gcc@10.3.0