diff --git a/homeassistant/components/camera/amcrest.py b/homeassistant/components/camera/amcrest.py
index 294a63bcff9..a50cdc859a7 100644
--- a/homeassistant/components/camera/amcrest.py
+++ b/homeassistant/components/camera/amcrest.py
@@ -18,7 +18,7 @@ from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.aiohttp_client import (
     async_get_clientsession, async_aiohttp_proxy_web)
 
-REQUIREMENTS = ['amcrest==1.1.5']
+REQUIREMENTS = ['amcrest==1.1.8']
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/homeassistant/components/sensor/amcrest.py b/homeassistant/components/sensor/amcrest.py
index 5a349d28b7c..2d05372220b 100644
--- a/homeassistant/components/sensor/amcrest.py
+++ b/homeassistant/components/sensor/amcrest.py
@@ -19,7 +19,7 @@ import homeassistant.loader as loader
 
 from requests.exceptions import HTTPError, ConnectTimeout
 
-REQUIREMENTS = ['amcrest==1.1.5']
+REQUIREMENTS = ['amcrest==1.1.8']
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -146,4 +146,4 @@ class AmcrestSensor(Entity):
             sd_total = self._camera.storage_total
             self._attrs['Total'] = '{0} {1}'.format(*sd_total)
             self._attrs['Used'] = '{0} {1}'.format(*sd_used)
-            self._state = self._camera.percent(sd_used[0], sd_total[0])
+            self._state = self._camera.storage_used_percent
diff --git a/requirements_all.txt b/requirements_all.txt
index 43c0240452c..7e800d62548 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -48,7 +48,7 @@ aiolifx==0.4.2
 
 # homeassistant.components.camera.amcrest
 # homeassistant.components.sensor.amcrest
-amcrest==1.1.5
+amcrest==1.1.8
 
 # homeassistant.components.media_player.anthemav
 anthemav==1.1.8