diff --git a/jupyterhub_config.py b/jupyterhub_config.py
index fde5034..2d3d1b7 100644
--- a/jupyterhub_config.py
+++ b/jupyterhub_config.py
@@ -1,22 +1,20 @@
 import os
 
+c = get_config()
+
 c.JupyterHub.spawner_class = 'marathonspawner.MarathonSpawner'
 
 c.JupyterHub.ip = '0.0.0.0'
 c.JupyterHub.hub_ip = '0.0.0.0'
-
-# Don't try to cleanup servers on exit - since in general for k8s, we want
-# the hub to be able to restart without losing user containers
+c.JupyterHub.cmd = 'start-singleuser.sh'
 c.JupyterHub.cleanup_servers = False
 
+c.MarathonSpawner.app_prefix = 'jupyter'
 c.MarathonSpawner.app_image = 'jupyterhub/singleuser'
 c.MarathonSpawner.app_prefix = 'jupyter'
 c.MarathonSpawner.marathon_host = 'http://leader.mesos:8080'
 c.MarathonSpawner.ports = [8000]
 c.MarathonSpawner.mem_limit = '2G'
 c.MarathonSpawner.cpu_limit = 1
-c.MarathonSpawner.hub_ip_connect = os.environ['HUB_IP_CONNECT']
-c.MarathonSpawner.hub_port_connect = os.environ['HUB_PORT_CONNECT']
-
 
 c.JupyterHub.authenticator_class = 'dummyauthenticator.DummyAuthenticator'
diff --git a/marathonspawner/_version.py b/marathonspawner/_version.py
index e1424ed..abeeedb 100644
--- a/marathonspawner/_version.py
+++ b/marathonspawner/_version.py
@@ -1 +1 @@
-__version__ = '0.3.1'
+__version__ = '0.4.0'
diff --git a/marathonspawner/marathonspawner.py b/marathonspawner/marathonspawner.py
index 63b65a6..738f026 100644
--- a/marathonspawner/marathonspawner.py
+++ b/marathonspawner/marathonspawner.py
@@ -2,11 +2,12 @@
 import socket
 from concurrent.futures import ThreadPoolExecutor
 from urllib.parse import urlparse, urlunparse
+import warnings
 
 from textwrap import dedent
 from tornado import gen
 from tornado.concurrent import run_on_executor
-from traitlets import Any, Integer, List, Unicode, default
+from traitlets import Any, Integer, List, Unicode, default, observe
 
 from marathon import MarathonClient
 from marathon.models.app import MarathonApp, MarathonHealthCheck
@@ -18,10 +19,12 @@
 
 from .volumenaming import default_format_volume_name
 
+import jupyterhub
+_jupyterhub_xy = '%i.%i' % (jupyterhub.version_info[:2])
 
 class MarathonSpawner(Spawner):
 
-    app_image = Unicode("jupyterhub/singleuser", config=True)
+    app_image = Unicode("jupyterhub/singleuser:%s" % _jupyterhub_xy, config=True)
 
     app_prefix = Unicode(
         "jupyter",
@@ -76,11 +79,29 @@ class MarathonSpawner(Spawner):
         help="Public IP address of the hub"
         ).tag(config=True)
 
+    @observe('hub_ip_connect')
+    def _ip_connect_changed(self, change):
+        if jupyterhub.version_info >= (0, 8):
+            warnings.warn(
+                "MarathonSpawner.hub_ip_connect is no longer needed with JupyterHub 0.8."
+                "  Use JupyterHub.hub_connect_ip instead.",
+                DeprecationWarning,
+            )
+
     hub_port_connect = Integer(
         -1,
         help="Public PORT of the hub"
         ).tag(config=True)
 
+    @observe('hub_port_connect')
+    def _port_connect_changed(self, change):
+        if jupyterhub.version_info >= (0, 8):
+            warnings.warn(
+                "MarathonSpawner.hub_port_connect is no longer needed with JupyterHub 0.8."
+                "  Use JupyterHub.hub_connect_port instead.",
+                DeprecationWarning,
+            )
+
     format_volume_name = Any(
         help="""Any callable that accepts a string template and a Spawner
         instance as parameters in that order and returns a string.
@@ -91,6 +112,16 @@ class MarathonSpawner(Spawner):
     def _get_default_format_volume_name(self):
         return default_format_volume_name
 
+    # fix default port to 8888, used in the container
+    @default('port')
+    def _port_default(self):
+        return 8888
+
+    # default to listening on all-interfaces in the container
+    @default('ip')
+    def _ip_default(self):
+        return '0.0.0.0'
+
     _executor = None
     @property
     def executor(self):
@@ -122,7 +153,7 @@ def get_health_checks(self):
             protocol='TCP',
             port_index=0,
             grace_period_seconds=300,
-            interval_seconds=60,
+            interval_seconds=30,
             timeout_seconds=20,
             max_consecutive_failures=0
             ))
@@ -201,25 +232,17 @@ def _public_hub_api_url(self):
             uri.fragment
             ))
 
-    def get_env(self):
-        env = super(MarathonSpawner, self).get_env()
-        env.update(dict(
-            # Jupyter Hub config
-            JPY_USER=self.user.name,
-            JPY_COOKIE_NAME=self.user.server.cookie_name,
-            JPY_BASE_URL=self.user.server.base_url,
-            JPY_HUB_PREFIX=self.hub.server.base_url,
-        ))
-
-        if self.notebook_dir:
-            env['NOTEBOOK_DIR'] = self.notebook_dir
-
-        if self.hub_ip_connect or self.hub_port_connect > 0:
-            hub_api_url = self._public_hub_api_url()
-        else:
-            hub_api_url = self.hub.api_url
-        env['JPY_HUB_API_URL'] = hub_api_url
-        return env
+    def get_args(self):
+        args = super().get_args()
+        if self.hub_ip_connect:
+            # JupyterHub 0.7 specifies --hub-api-url
+            # on the command-line, which is hard to update
+            for idx, arg in enumerate(list(args)):
+                if arg.startswith('--hub-api-url='):
+                    args.pop(idx)
+                    break
+            args.append('--hub-api-url=%s' % self._public_hub_api_url())
+        return args
 
     @gen.coroutine
     def start(self):
@@ -239,8 +262,10 @@ def start(self):
         else:
             mem_request = 1024.0
 
+        cmd = self.cmd + self.get_args()
         app_request = MarathonApp(
             id=self.container_name,
+            cmd=' '.join(cmd),
             env=self.get_env(),
             cpus=self.cpu_limit,
             mem=mem_request,