diff --git a/homeassistant/components/discovery.py b/homeassistant/components/discovery.py
index 41cf3791256..7784f3771de 100644
--- a/homeassistant/components/discovery.py
+++ b/homeassistant/components/discovery.py
@@ -21,7 +21,7 @@ from homeassistant.helpers.event import async_track_point_in_utc_time
 from homeassistant.helpers.discovery import async_load_platform, async_discover
 import homeassistant.util.dt as dt_util
 
-REQUIREMENTS = ['netdisco==2.0.0']
+REQUIREMENTS = ['netdisco==2.1.0']
 
 DOMAIN = 'discovery'
 
diff --git a/homeassistant/components/media_player/cast.py b/homeassistant/components/media_player/cast.py
index 088aef82373..e14244793cf 100644
--- a/homeassistant/components/media_player/cast.py
+++ b/homeassistant/components/media_player/cast.py
@@ -369,7 +369,8 @@ class CastDevice(MediaPlayerDevice):
 
         if self._chromecast is not None:
             if old_cast_info.host_port == cast_info.host_port:
-                # Nothing connection-related updated
+                _LOGGER.debug("No connection related update: %s",
+                              cast_info.host_port)
                 return
             await self._async_disconnect()
 
@@ -403,7 +404,12 @@ class CastDevice(MediaPlayerDevice):
 
         await self.hass.async_add_job(self._chromecast.disconnect)
 
-        # Invalidate some attributes
+        self._invalidate()
+
+        self.async_schedule_update_ha_state()
+
+    def _invalidate(self):
+        """Invalidate some attributes."""
         self._chromecast = None
         self.cast_status = None
         self.media_status = None
@@ -412,8 +418,6 @@ class CastDevice(MediaPlayerDevice):
             self._status_listener.invalidate()
             self._status_listener = None
 
-        self.async_schedule_update_ha_state()
-
     # ========== Callbacks ==========
     def new_cast_status(self, cast_status):
         """Handle updates of the cast status."""
@@ -428,7 +432,16 @@ class CastDevice(MediaPlayerDevice):
 
     def new_connection_status(self, connection_status):
         """Handle updates of connection status."""
-        from pychromecast.socket_client import CONNECTION_STATUS_CONNECTED
+        from pychromecast.socket_client import CONNECTION_STATUS_CONNECTED, \
+            CONNECTION_STATUS_DISCONNECTED
+
+        _LOGGER.debug("Received cast device connection status: %s",
+                      connection_status.status)
+        if connection_status.status == CONNECTION_STATUS_DISCONNECTED:
+            self._available = False
+            self._invalidate()
+            self.schedule_update_ha_state()
+            return
 
         new_available = connection_status.status == CONNECTION_STATUS_CONNECTED
         if new_available != self._available:
diff --git a/homeassistant/components/sensor/snmp.py b/homeassistant/components/sensor/snmp.py
index d66a24524fb..718e4f6fb0d 100644
--- a/homeassistant/components/sensor/snmp.py
+++ b/homeassistant/components/sensor/snmp.py
@@ -182,7 +182,7 @@ class SnmpSensor(Entity):
         if value is None:
             value = STATE_UNKNOWN
         elif self._value_template is not None:
-            value = self._value_template.render_with_possible_json_value(
+            value = self._value_template.async_render_with_possible_json_value(
                 value, STATE_UNKNOWN)
 
         self._state = value
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 546f47a62b3..4719e934109 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -2,7 +2,7 @@
 """Constants used by Home Assistant components."""
 MAJOR_VERSION = 0
 MINOR_VERSION = 78
-PATCH_VERSION = '0'
+PATCH_VERSION = '1'
 __short_version__ = '{}.{}'.format(MAJOR_VERSION, MINOR_VERSION)
 __version__ = '{}.{}'.format(__short_version__, PATCH_VERSION)
 REQUIRED_PYTHON_VER = (3, 5, 3)
diff --git a/requirements_all.txt b/requirements_all.txt
index de30bc379d9..1297d421b67 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -611,7 +611,7 @@ ndms2_client==0.0.4
 netdata==0.1.2
 
 # homeassistant.components.discovery
-netdisco==2.0.0
+netdisco==2.1.0
 
 # homeassistant.components.sensor.neurio_energy
 neurio==0.3.1