diff --git a/homeassistant/components/cambridge_audio/entity.py b/homeassistant/components/cambridge_audio/entity.py
index ac43a673725..d2006a6e7cd 100644
--- a/homeassistant/components/cambridge_audio/entity.py
+++ b/homeassistant/components/cambridge_audio/entity.py
@@ -62,4 +62,4 @@ class CambridgeAudioEntity(Entity):
 
     async def async_will_remove_from_hass(self) -> None:
         """Remove callbacks."""
-        await self.client.unregister_state_update_callbacks(self._state_update_callback)
+        self.client.unregister_state_update_callbacks(self._state_update_callback)
diff --git a/homeassistant/components/cambridge_audio/manifest.json b/homeassistant/components/cambridge_audio/manifest.json
index ed81b503d5e..edacd17f54d 100644
--- a/homeassistant/components/cambridge_audio/manifest.json
+++ b/homeassistant/components/cambridge_audio/manifest.json
@@ -7,6 +7,6 @@
   "integration_type": "device",
   "iot_class": "local_push",
   "loggers": ["aiostreammagic"],
-  "requirements": ["aiostreammagic==2.8.3"],
+  "requirements": ["aiostreammagic==2.8.4"],
   "zeroconf": ["_stream-magic._tcp.local.", "_smoip._tcp.local."]
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index 2c62c88514b..38deb0bc948 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -381,7 +381,7 @@ aiosolaredge==0.2.0
 aiosteamist==1.0.0
 
 # homeassistant.components.cambridge_audio
-aiostreammagic==2.8.3
+aiostreammagic==2.8.4
 
 # homeassistant.components.switcher_kis
 aioswitcher==4.2.0
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 3552fc16e75..add522668c0 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -363,7 +363,7 @@ aiosolaredge==0.2.0
 aiosteamist==1.0.0
 
 # homeassistant.components.cambridge_audio
-aiostreammagic==2.8.3
+aiostreammagic==2.8.4
 
 # homeassistant.components.switcher_kis
 aioswitcher==4.2.0