diff --git a/catt/cli.py b/catt/cli.py
index 6457949..e0dffd5 100755
--- a/catt/cli.py
+++ b/catt/cli.py
@@ -315,16 +315,22 @@ def cast(
 
 @cli.command("cast_site", short_help="Cast any website to a Chromecast.")
 @click.argument("url", callback=process_url)
+@click.option(
+    "-i",
+    "--iframe",
+    is_flag=True,
+    help="Load website into an iframe to avoid timeout (requires HTTPS).",
+)
 @click.pass_obj
-def cast_site(settings, url):
+def cast_site(settings, url, iframe):
     cst = setup_cast(
         settings["selected_device"],
         controller="dashcast",
         action="load_url",
         prep="app",
     )
-    click.echo('Casting {} on "{}"...'.format(url, cst.cc_name))
-    cst.load_url(url)
+    click.echo('Casting {} on "{}" (iframe={})...'.format(url, cst.cc_name, iframe))
+    cst.load_url(url, force=not iframe)
 
 
 @cli.command(short_help="Add a video to the queue (YouTube only).")
diff --git a/catt/controllers.py b/catt/controllers.py
index 13950bc..c05779e 100644
--- a/catt/controllers.py
+++ b/catt/controllers.py
@@ -7,7 +7,6 @@
 
 import pychromecast
 from pychromecast.config import APP_BACKDROP as BACKDROP_APP_ID
-from pychromecast.config import APP_DASHCAST as DASHCAST_APP_ID
 from pychromecast.config import APP_MEDIA_RECEIVER as MEDIA_RECEIVER_APP_ID
 from pychromecast.config import APP_YOUTUBE as YOUTUBE_APP_ID
 from pychromecast.controllers.dashcast import DashCastController as PyChromecastDashCastController
@@ -26,6 +25,9 @@
 VALID_STATE_EVENTS = ["UNKNOWN", "IDLE", "BUFFERING", "PLAYING", "PAUSED"]
 CLOUD_APP_ID = "38579375"
 
+DASHCAST_NAMESPACE = "urn:x-cast:es.offd.dashcast"
+DASHCAST_APP_ID = "5C517DAC"
+
 
 class App:
     def __init__(self, app_name, app_id, supported_device_types):
@@ -496,11 +498,11 @@ def restore(self, data):
 
 class DashCastController(CastController):
     def __init__(self, cast, app, prep=None):
-        self._controller = PyChromecastDashCastController()
+        self._controller = PyChromecastDashCastController(appNamespace=DASHCAST_NAMESPACE, appId=DASHCAST_APP_ID)
         super(DashCastController, self).__init__(cast, app, prep=prep)
 
-    def load_url(self, url, **kwargs):
-        self._controller.load_url(url, force=True)
+    def load_url(self, url, force=True, **kwargs):
+        self._controller.load_url(url, force=force)
 
     def prep_app(self):
         """Make sure desired chromecast app is running."""