diff --git a/tljh/jupyterhub_config.py b/tljh/jupyterhub_config.py
index 95b62ef..4b39ea4 100644
--- a/tljh/jupyterhub_config.py
+++ b/tljh/jupyterhub_config.py
@@ -24,9 +24,14 @@ class CustomSpawner(SystemdSpawner):
 
 c.JupyterHub.spawner_class = CustomSpawner
 
-c.ConfigurableHTTPProxy.should_start = False
 c.JupyterHub.port = 80
 
+# Use a high port so users can try this on machines with a JupyterHub already present
+c.JupyterHub.hub_port = 15001
+
+c.ConfigurableHTTPProxy.should_start = False
+c.ConfigurableHTTPProxy.api_url = 'http://127.0.0.1:15002'
+
 c.SystemdSpawner.extra_paths = [os.path.join(USER_ENV_PREFIX, 'bin')]
 
 configurer.apply_yaml_config(os.path.join(INSTALL_PREFIX, 'config.yaml'), c)
diff --git a/tljh/systemd-units/configurable-http-proxy.service b/tljh/systemd-units/configurable-http-proxy.service
index b7bf910..772cd79 100644
--- a/tljh/systemd-units/configurable-http-proxy.service
+++ b/tljh/systemd-units/configurable-http-proxy.service
@@ -20,5 +20,5 @@ ExecStart={install_prefix}/hub/bin/configurable-http-proxy \
             --ip 0.0.0.0 \
             --port 80 \
             --api-ip 127.0.0.1 \
-            --api-port 8001 \
-            --error-target http://127.0.0.1:8081/hub/error
+            --api-port 15002 \
+            --error-target http://127.0.0.1:15001/hub/error