diff --git a/Dockerfile b/Dockerfile
index b57be02..f555531 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -66,7 +66,7 @@ RUN pip3 install \
     jsonschema'[format,format-nongpl]' \
     jupyterhub \
     jupyterlab \
-    jupyter-rsession-proxy \
+    jupyter-rsession-proxy==2.2.1 \
     jupyter-server-proxy \
     notebook