diff --git a/homeassistant/components/homekit/manifest.json b/homeassistant/components/homekit/manifest.json
index e40d743068c..2589a1ac6ec 100644
--- a/homeassistant/components/homekit/manifest.json
+++ b/homeassistant/components/homekit/manifest.json
@@ -3,7 +3,7 @@
   "name": "HomeKit",
   "documentation": "https://www.home-assistant.io/integrations/homekit",
   "requirements": [
-    "HAP-python==4.1.0",
+    "HAP-python==4.2.1",
     "fnvhash==0.1.0",
     "PyQRCode==1.2.1",
     "base36==0.1.1"
diff --git a/homeassistant/components/homekit/type_fans.py b/homeassistant/components/homekit/type_fans.py
index 85157dd9367..d25f197e0ca 100644
--- a/homeassistant/components/homekit/type_fans.py
+++ b/homeassistant/components/homekit/type_fans.py
@@ -219,7 +219,7 @@ class Fan(HomeAccessory):
             # the rotation speed is mapped to 1 otherwise the update is ignored
             # in order to avoid this incorrect behavior.
             if percentage == 0 and state == STATE_ON:
-                percentage = 1
+                percentage = max(1, self.char_speed.properties[PROP_MIN_STEP])
             if percentage is not None:
                 self.char_speed.set_value(percentage)
 
diff --git a/requirements_all.txt b/requirements_all.txt
index 2d43b04240f..e28de73c8c9 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -14,7 +14,7 @@ Adafruit-SHT31==1.0.2
 # Adafruit_BBIO==1.1.1
 
 # homeassistant.components.homekit
-HAP-python==4.1.0
+HAP-python==4.2.1
 
 # homeassistant.components.mastodon
 Mastodon.py==1.5.1
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index b6c37dac08a..54ea4ab4448 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -7,7 +7,7 @@
 AEMET-OpenData==0.2.1
 
 # homeassistant.components.homekit
-HAP-python==4.1.0
+HAP-python==4.2.1
 
 # homeassistant.components.flick_electric
 PyFlick==0.0.2