diff --git a/setup.py b/setup.py
index 58b937a..45b5fed 100644
--- a/setup.py
+++ b/setup.py
@@ -18,6 +18,7 @@ with open('README.md', encoding='utf-8') as f:
 tests_require = [
     'attrs>=17.4.0',
     'beautifulsoup4>=4.6.0',
+    'Click>=7.0',
     'flake8>=3.4.1',
     'hypothesis>=3.7.0',
     'mypy-extensions==0.4.1',