diff --git a/setup.py b/setup.py
index 51ee590..f40eb3d 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,6 @@
     'dev': [
       'coveralls==3.3.1',
       'coverage==6.5.0',
-      'mock==4.0.3',
       'parameterized==0.8.1',
       'pytest==7.2.0',
       'pytest-cov==4.0.0',
diff --git a/tests/test_nuheat.py b/tests/test_nuheat.py
index 878faba..cd7c4f3 100644
--- a/tests/test_nuheat.py
+++ b/tests/test_nuheat.py
@@ -1,7 +1,7 @@
 import json
 import responses
 
-from mock import patch
+from unittest.mock import patch
 from parameterized import parameterized
 from urllib.parse import urlencode
 
diff --git a/tests/test_thermostat.py b/tests/test_thermostat.py
index 3dac0d9..05faef6 100644
--- a/tests/test_thermostat.py
+++ b/tests/test_thermostat.py
@@ -2,7 +2,7 @@
 import responses
 
 from datetime import datetime, timezone, timedelta
-from mock import patch
+from unittest.mock import patch
 from parameterized import parameterized
 from urllib.parse import urlencode