diff --git a/homeassistant/components/switch/wemo.py b/homeassistant/components/switch/wemo.py
index 97c0fb3d386620..e78190bf444d70 100644
--- a/homeassistant/components/switch/wemo.py
+++ b/homeassistant/components/switch/wemo.py
@@ -61,16 +61,14 @@ def __init__(self, device):
         wemo.SUBSCRIPTION_REGISTRY.register(self.wemo)
         wemo.SUBSCRIPTION_REGISTRY.on(self.wemo, None, self._update_callback)
 
-    def _update_callback(self, _device, _params):
+    def _update_callback(self, _device, _type, _params):
         """Called by the Wemo device callback to update state."""
         _LOGGER.info(
             'Subscription update for  %s',
             _device)
-        if self._model_name == 'CoffeeMaker':
-            self.wemo.subscription_callback(_params)
-            self._update(force_update=False)
-        else:
-            self.update()
+        updated = self.wemo.subscription_update(_type, _params)
+        self._update(force_update=(not updated))
+
         if not hasattr(self, 'hass'):
             return
         self.schedule_update_ha_state()
@@ -219,5 +217,6 @@ def _update(self, force_update=True):
                 self.maker_params = self.wemo.maker_params
             elif self._model_name == 'CoffeeMaker':
                 self.coffeemaker_mode = self.wemo.mode
-        except AttributeError:
-            _LOGGER.warning('Could not update status for %s', self.name)
+        except AttributeError as err:
+            _LOGGER.warning('Could not update status for %s (%s)',
+                            self.name, err)
diff --git a/homeassistant/components/wemo.py b/homeassistant/components/wemo.py
index c121c58470bd5a..7cec1707211a6b 100644
--- a/homeassistant/components/wemo.py
+++ b/homeassistant/components/wemo.py
@@ -14,7 +14,7 @@
 
 from homeassistant.const import EVENT_HOMEASSISTANT_STOP
 
-REQUIREMENTS = ['pywemo==0.4.13']
+REQUIREMENTS = ['pywemo==0.4.15']
 
 DOMAIN = 'wemo'
 
diff --git a/requirements_all.txt b/requirements_all.txt
index ef14d3641367a6..abaf1268adf931 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -644,7 +644,7 @@ pyvera==0.2.24
 pywebpush==0.6.1
 
 # homeassistant.components.wemo
-pywemo==0.4.13
+pywemo==0.4.15
 
 # homeassistant.components.zabbix
 pyzabbix==0.7.4