diff --git a/Dockerfile b/Dockerfile
index 6ba0253675cb5d6aad51d451fe8c53c205caefdb..9e6cafa1553edde08a8699f27afb8dc0ec80a70e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ RUN pip3 install --upgrade pip
 RUN mamba update mamba
 
 # Python
-RUN pip install jupyter-server-proxy=4.4.0
+RUN pip install jupyter-server-proxy==4.4.0
 RUN pip install jupyterlab-git==0.50.1
 RUN pip install jupyter_contrib_nbextensions
 RUN pip install myst-nb