diff --git a/requirements-dev.txt b/requirements-dev.txt
index 2b9c3bef0..4dea29f3c 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,7 +1,6 @@
 codecov
 coverage
 flake8>=3.8.0
-mock
 pytest
 pytest-cov
 pytest-sugar
diff --git a/test/test_wordcloud_cli.py b/test/test_wordcloud_cli.py
index f4f79d0c5..5b50bce9a 100644
--- a/test/test_wordcloud_cli.py
+++ b/test/test_wordcloud_cli.py
@@ -8,7 +8,7 @@
 import wordcloud as wc
 from wordcloud import wordcloud_cli as cli
 
-from mock import patch
+from unittest.mock import patch
 import pytest
 
 import matplotlib