diff --git a/homeassistant/components/heatmiser/climate.py b/homeassistant/components/heatmiser/climate.py
index f9f0cfacf60..1102dbc0c74 100644
--- a/homeassistant/components/heatmiser/climate.py
+++ b/homeassistant/components/heatmiser/climate.py
@@ -1,11 +1,11 @@
-"""Support for the PRT Heatmiser themostats using the V3 protocol."""
+"""Support for the PRT Heatmiser thermostats using the V3 protocol."""
 
 from __future__ import annotations
 
 import logging
 from typing import Any
 
-from heatmiserV3 import connection, heatmiser
+from heatmiserv3 import connection, heatmiser
 import voluptuous as vol
 
 from homeassistant.components.climate import (
diff --git a/homeassistant/components/heatmiser/manifest.json b/homeassistant/components/heatmiser/manifest.json
index 7ae9cac1297..f3f33f79b04 100644
--- a/homeassistant/components/heatmiser/manifest.json
+++ b/homeassistant/components/heatmiser/manifest.json
@@ -5,5 +5,5 @@
   "documentation": "https://www.home-assistant.io/integrations/heatmiser",
   "iot_class": "local_polling",
   "loggers": ["heatmiserV3"],
-  "requirements": ["heatmiserV3==1.1.18"]
+  "requirements": ["heatmiserV3==2.0.3"]
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index cd8d03544f3..b5f12d1fef9 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1096,7 +1096,7 @@ hassil==1.7.4
 hdate==0.10.9
 
 # homeassistant.components.heatmiser
-heatmiserV3==1.1.18
+heatmiserV3==2.0.3
 
 # homeassistant.components.here_travel_time
 here-routing==1.0.1
diff --git a/script/licenses.py b/script/licenses.py
index fdc796d0441..f4d521806dd 100644
--- a/script/licenses.py
+++ b/script/licenses.py
@@ -154,7 +154,6 @@ EXCEPTIONS = {
     "eliqonline",  # https://github.com/molobrakos/eliqonline/pull/17
     "enocean",  # https://github.com/kipe/enocean/pull/142
     "gardena-bluetooth",  # https://github.com/elupus/gardena-bluetooth/pull/11
-    "heatmiserV3",  # https://github.com/andylockran/heatmiserV3/pull/94
     "huum",  # https://github.com/frwickst/pyhuum/pull/8
     "imutils",  # https://github.com/PyImageSearch/imutils/pull/292
     "iso4217",  # Public domain