diff --git a/homeassistant/components/ness_alarm/__init__.py b/homeassistant/components/ness_alarm/__init__.py
index 653ade806ec..4e8c8293c2d 100644
--- a/homeassistant/components/ness_alarm/__init__.py
+++ b/homeassistant/components/ness_alarm/__init__.py
@@ -13,7 +13,7 @@ from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.discovery import async_load_platform
 from homeassistant.helpers.dispatcher import async_dispatcher_send
 
-REQUIREMENTS = ['nessclient==0.9.14']
+REQUIREMENTS = ['nessclient==0.9.15']
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -22,6 +22,7 @@ DATA_NESS = 'ness_alarm'
 
 CONF_DEVICE_HOST = 'host'
 CONF_DEVICE_PORT = 'port'
+CONF_INFER_ARMING_STATE = 'infer_arming_state'
 CONF_ZONES = 'zones'
 CONF_ZONE_NAME = 'name'
 CONF_ZONE_TYPE = 'type'
@@ -29,6 +30,7 @@ CONF_ZONE_ID = 'id'
 ATTR_OUTPUT_ID = 'output_id'
 DEFAULT_ZONES = []
 DEFAULT_SCAN_INTERVAL = datetime.timedelta(minutes=1)
+DEFAULT_INFER_ARMING_STATE = False
 
 SIGNAL_ZONE_CHANGED = 'ness_alarm.zone_changed'
 SIGNAL_ARMING_STATE_CHANGED = 'ness_alarm.arming_state_changed'
@@ -50,6 +52,9 @@ CONFIG_SCHEMA = vol.Schema({
             vol.All(cv.time_period, cv.positive_timedelta),
         vol.Optional(CONF_ZONES, default=DEFAULT_ZONES):
             vol.All(cv.ensure_list, [ZONE_SCHEMA]),
+        vol.Optional(CONF_INFER_ARMING_STATE,
+                     default=DEFAULT_INFER_ARMING_STATE):
+            cv.boolean
     }),
 }, extra=vol.ALLOW_EXTRA)
 
@@ -74,9 +79,11 @@ async def async_setup(hass, config):
     host = conf[CONF_DEVICE_HOST]
     port = conf[CONF_DEVICE_PORT]
     scan_interval = conf[CONF_SCAN_INTERVAL]
+    infer_arming_state = conf[CONF_INFER_ARMING_STATE]
 
     client = Client(host=host, port=port, loop=hass.loop,
-                    update_interval=scan_interval.total_seconds())
+                    update_interval=scan_interval.total_seconds(),
+                    infer_arming_state=infer_arming_state)
     hass.data[DATA_NESS] = client
 
     async def _close(event):
diff --git a/requirements_all.txt b/requirements_all.txt
index ff1a18d9f6d..15db65c1608 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -735,7 +735,7 @@ nad_receiver==0.0.11
 ndms2_client==0.0.6
 
 # homeassistant.components.ness_alarm
-nessclient==0.9.14
+nessclient==0.9.15
 
 # homeassistant.components.netdata.sensor
 netdata==0.1.2