diff --git a/tljh/jupyterhub_config.py b/tljh/jupyterhub_config.py
index 4abb891..006c9b2 100644
--- a/tljh/jupyterhub_config.py
+++ b/tljh/jupyterhub_config.py
@@ -29,6 +29,9 @@ class CustomSpawner(SystemdSpawner):
 
 c.JupyterHub.spawner_class = CustomSpawner
 
+# leave users running when the Hub restarts
+c.JupyterHub.cleanup_servers = False
+
 # Use a high port so users can try this on machines with a JupyterHub already present
 c.JupyterHub.hub_port = 15001