diff --git a/homeassistant/components/switch/wink.py b/homeassistant/components/switch/wink.py
index ec9311ac9e9..aa33c2f7132 100644
--- a/homeassistant/components/switch/wink.py
+++ b/homeassistant/components/switch/wink.py
@@ -65,7 +65,8 @@ class WinkToggleDevice(WinkDevice, ToggleEntity):
         attributes = super(WinkToggleDevice, self).device_state_attributes
         try:
             event = self.wink.last_event()
-            attributes["last_event"] = event
+            if event is not None:
+                attributes["last_event"] = event
         except AttributeError:
             pass
         return attributes
diff --git a/homeassistant/components/wink.py b/homeassistant/components/wink.py
index 316c939492b..8d40f5dad48 100644
--- a/homeassistant/components/wink.py
+++ b/homeassistant/components/wink.py
@@ -25,7 +25,7 @@ from homeassistant.const import (
 from homeassistant.helpers.entity import Entity
 import homeassistant.helpers.config_validation as cv
 
-REQUIREMENTS = ['python-wink==1.4.2', 'pubnubsub-handler==1.0.2']
+REQUIREMENTS = ['python-wink==1.5.1', 'pubnubsub-handler==1.0.2']
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/requirements_all.txt b/requirements_all.txt
index ad38eb8aa05..07bb6846c61 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -775,7 +775,7 @@ python-velbus==2.0.11
 python-vlc==1.1.2
 
 # homeassistant.components.wink
-python-wink==1.4.2
+python-wink==1.5.1
 
 # homeassistant.components.zwave
 python_openzwave==0.4.0.31