diff --git a/homeassistant/components/unifi/controller.py b/homeassistant/components/unifi/controller.py
index 7da36131058..a6981aeddee 100644
--- a/homeassistant/components/unifi/controller.py
+++ b/homeassistant/components/unifi/controller.py
@@ -162,7 +162,7 @@ class UniFiController:
                     WIRELESS_GUEST_CONNECTED,
                 ):
                     self.update_wireless_clients()
-            elif data.get("clients") or data.get("devices"):
+            elif "clients" in data or "devices" in data:
                 async_dispatcher_send(self.hass, self.signal_update)
 
     @property
diff --git a/homeassistant/components/unifi/manifest.json b/homeassistant/components/unifi/manifest.json
index 85633ebf131..01aa245f608 100644
--- a/homeassistant/components/unifi/manifest.json
+++ b/homeassistant/components/unifi/manifest.json
@@ -4,7 +4,7 @@
   "config_flow": true,
   "documentation": "https://www.home-assistant.io/integrations/unifi",
   "requirements": [
-    "aiounifi==14"
+    "aiounifi==15"
   ],
   "dependencies": [],
   "codeowners": [
diff --git a/homeassistant/components/unifi/switch.py b/homeassistant/components/unifi/switch.py
index 84e85188ede..0df019de02c 100644
--- a/homeassistant/components/unifi/switch.py
+++ b/homeassistant/components/unifi/switch.py
@@ -262,7 +262,7 @@ class UniFiPOEClientSwitch(UniFiClient, SwitchDevice, RestoreEntity):
         """Shortcut to the switch port that client is connected to."""
         try:
             return self.device.ports[self.client.sw_port]
-        except TypeError:
+        except (AttributeError, KeyError, TypeError):
             LOGGER.warning(
                 "Entity %s reports faulty device %s or port %s",
                 self.entity_id,
@@ -282,7 +282,7 @@ class UniFiBlockClientSwitch(UniFiClient, SwitchDevice):
     @property
     def is_on(self):
         """Return true if client is allowed to connect."""
-        return not self.client.blocked
+        return not self.is_blocked
 
     async def async_turn_on(self, **kwargs):
         """Turn on connectivity for client."""
@@ -291,3 +291,10 @@ class UniFiBlockClientSwitch(UniFiClient, SwitchDevice):
     async def async_turn_off(self, **kwargs):
         """Turn off connectivity for client."""
         await self.controller.api.clients.async_block(self.client.mac)
+
+    @property
+    def icon(self):
+        """Return the icon to use in the frontend."""
+        if self.is_blocked:
+            return "mdi:network-off"
+        return "mdi:network"
diff --git a/homeassistant/components/unifi/unifi_client.py b/homeassistant/components/unifi/unifi_client.py
index f9e77d47c0e..4c1ce402e7f 100644
--- a/homeassistant/components/unifi/unifi_client.py
+++ b/homeassistant/components/unifi/unifi_client.py
@@ -2,6 +2,14 @@
 
 import logging
 
+from aiounifi.api import SOURCE_EVENT
+from aiounifi.events import (
+    WIRED_CLIENT_BLOCKED,
+    WIRED_CLIENT_UNBLOCKED,
+    WIRELESS_CLIENT_BLOCKED,
+    WIRELESS_CLIENT_UNBLOCKED,
+)
+
 from homeassistant.core import callback
 from homeassistant.helpers.device_registry import CONNECTION_NETWORK_MAC
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
@@ -9,6 +17,9 @@ from homeassistant.helpers.entity import Entity
 
 LOGGER = logging.getLogger(__name__)
 
+CLIENT_BLOCKED = (WIRED_CLIENT_BLOCKED, WIRELESS_CLIENT_BLOCKED)
+CLIENT_UNBLOCKED = (WIRED_CLIENT_UNBLOCKED, WIRELESS_CLIENT_UNBLOCKED)
+
 
 class UniFiClient(Entity):
     """Base class for UniFi clients."""
@@ -18,7 +29,9 @@ class UniFiClient(Entity):
         self.client = client
         self.controller = controller
         self.listeners = []
+
         self.is_wired = self.client.mac not in controller.wireless_clients
+        self.is_blocked = self.client.blocked
 
     async def async_added_to_hass(self) -> None:
         """Client entity created."""
@@ -41,6 +54,12 @@ class UniFiClient(Entity):
         """Update the clients state."""
         if self.is_wired and self.client.mac in self.controller.wireless_clients:
             self.is_wired = False
+
+        if self.client.last_updated == SOURCE_EVENT:
+
+            if self.client.event.event in CLIENT_BLOCKED + CLIENT_UNBLOCKED:
+                self.is_blocked = self.client.event.event in CLIENT_BLOCKED
+
         LOGGER.debug("Updating client %s %s", self.entity_id, self.client.mac)
         self.async_schedule_update_ha_state()
 
diff --git a/requirements_all.txt b/requirements_all.txt
index dfbe9ef8c4e..678bf3ba674 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -203,7 +203,7 @@ aiopylgtv==0.3.3
 aioswitcher==2019.4.26
 
 # homeassistant.components.unifi
-aiounifi==14
+aiounifi==15
 
 # homeassistant.components.wwlln
 aiowwlln==2.0.2
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 0580e954e10..00e04b8fd99 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -81,7 +81,7 @@ aiopylgtv==0.3.3
 aioswitcher==2019.4.26
 
 # homeassistant.components.unifi
-aiounifi==14
+aiounifi==15
 
 # homeassistant.components.wwlln
 aiowwlln==2.0.2