diff --git a/homeassistant/components/kef/manifest.json b/homeassistant/components/kef/manifest.json
index b950b144cf9..a2769cd8eb6 100644
--- a/homeassistant/components/kef/manifest.json
+++ b/homeassistant/components/kef/manifest.json
@@ -4,5 +4,5 @@
   "documentation": "https://www.home-assistant.io/integrations/kef",
   "dependencies": [],
   "codeowners": ["@basnijholt"],
-  "requirements": ["aiokef==0.2.5", "getmac==0.8.1"]
+  "requirements": ["aiokef==0.2.6", "getmac==0.8.1"]
 }
diff --git a/homeassistant/components/kef/media_player.py b/homeassistant/components/kef/media_player.py
index 177b2fccd13..dc91b94f5ef 100644
--- a/homeassistant/components/kef/media_player.py
+++ b/homeassistant/components/kef/media_player.py
@@ -5,7 +5,7 @@ from functools import partial
 import ipaddress
 import logging
 
-from aiokef.aiokef import AsyncKefSpeaker
+from aiokef import AsyncKefSpeaker
 from getmac import get_mac_address
 import voluptuous as vol
 
@@ -36,6 +36,7 @@ DEFAULT_PORT = 50001
 DEFAULT_MAX_VOLUME = 0.5
 DEFAULT_VOLUME_STEP = 0.05
 DEFAULT_INVERSE_SPEAKER_MODE = False
+DEFAULT_SUPPORTS_ON = True
 
 DOMAIN = "kef"
 
@@ -44,18 +45,10 @@ SCAN_INTERVAL = timedelta(seconds=30)
 SOURCES = {"LSX": ["Wifi", "Bluetooth", "Aux", "Opt"]}
 SOURCES["LS50"] = SOURCES["LSX"] + ["Usb"]
 
-SUPPORT_KEF = (
-    SUPPORT_VOLUME_SET
-    | SUPPORT_VOLUME_STEP
-    | SUPPORT_VOLUME_MUTE
-    | SUPPORT_SELECT_SOURCE
-    | SUPPORT_TURN_OFF
-    | SUPPORT_TURN_ON
-)
-
 CONF_MAX_VOLUME = "maximum_volume"
 CONF_VOLUME_STEP = "volume_step"
 CONF_INVERSE_SPEAKER_MODE = "inverse_speaker_mode"
+CONF_SUPPORTS_ON = "supports_on"
 CONF_STANDBY_TIME = "standby_time"
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
@@ -69,6 +62,7 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
         vol.Optional(
             CONF_INVERSE_SPEAKER_MODE, default=DEFAULT_INVERSE_SPEAKER_MODE
         ): cv.boolean,
+        vol.Optional(CONF_SUPPORTS_ON, default=DEFAULT_SUPPORTS_ON): cv.boolean,
         vol.Optional(CONF_STANDBY_TIME): vol.In([20, 60]),
     }
 )
@@ -86,6 +80,7 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     maximum_volume = config[CONF_MAX_VOLUME]
     volume_step = config[CONF_VOLUME_STEP]
     inverse_speaker_mode = config[CONF_INVERSE_SPEAKER_MODE]
+    supports_on = config[CONF_SUPPORTS_ON]
     standby_time = config.get(CONF_STANDBY_TIME)
 
     sources = SOURCES[speaker_type]
@@ -117,6 +112,7 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
         volume_step,
         standby_time,
         inverse_speaker_mode,
+        supports_on,
         sources,
         ioloop=hass.loop,
         unique_id=unique_id,
@@ -141,6 +137,7 @@ class KefMediaPlayer(MediaPlayerDevice):
         volume_step,
         standby_time,
         inverse_speaker_mode,
+        supports_on,
         sources,
         ioloop,
         unique_id,
@@ -158,6 +155,7 @@ class KefMediaPlayer(MediaPlayerDevice):
             ioloop=ioloop,
         )
         self._unique_id = unique_id
+        self._supports_on = supports_on
 
         self._state = None
         self._muted = None
@@ -210,7 +208,17 @@ class KefMediaPlayer(MediaPlayerDevice):
     @property
     def supported_features(self):
         """Flag media player features that are supported."""
-        return SUPPORT_KEF
+        support_kef = (
+            SUPPORT_VOLUME_SET
+            | SUPPORT_VOLUME_STEP
+            | SUPPORT_VOLUME_MUTE
+            | SUPPORT_SELECT_SOURCE
+            | SUPPORT_TURN_OFF
+        )
+        if self._supports_on:
+            support_kef |= SUPPORT_TURN_ON
+
+        return support_kef
 
     @property
     def source(self):
@@ -243,6 +251,8 @@ class KefMediaPlayer(MediaPlayerDevice):
 
     async def async_turn_on(self):
         """Turn the media player on."""
+        if not self._supports_on:
+            raise NotImplementedError()
         await self._speaker.turn_on()
 
     async def async_volume_up(self):
diff --git a/requirements_all.txt b/requirements_all.txt
index 949ec192564..d862efaa22b 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -172,7 +172,7 @@ aioimaplib==0.7.15
 aiokafka==0.5.1
 
 # homeassistant.components.kef
-aiokef==0.2.5
+aiokef==0.2.6
 
 # homeassistant.components.lifx
 aiolifx==0.6.7