diff --git a/site-config/ebrainslab/spack.yaml b/site-config/ebrainslab/spack.yaml
index 2533621056e19d28234ff4cf3e40551e78daab22..aa4eb3fa4483f15bffaaa4f50df500950d24531c 100644
--- a/site-config/ebrainslab/spack.yaml
+++ b/site-config/ebrainslab/spack.yaml
@@ -4,6 +4,7 @@ spack:
     - py-ipycanvas
     - py-ipykernel
     - py-ipython
+    - py-jupyter-server-proxy
     - py-notebook
     - r-irkernel
     # "collab"-specific constraint to match ("jupyterlab_widgets") in the base image