diff --git a/setup.py b/setup.py
index 266bf6a..bfd3cce 100644
--- a/setup.py
+++ b/setup.py
@@ -94,16 +94,17 @@ def run(self, *args, **kwargs):
       download_url='{}/tarball/{}'.format(
           about['__url__'], about['__version__']),
       cmdclass={'build_ext': BuildExtension},
-      install_requires=['cython>=0.28.0',
-                        'opencv-python-headless<=4.2.0.32; python_version < "3"',
-                        'opencv-python-headless; python_version >= "3"',
-                        'pandas',
-                        'networkx>=2.1',
-                        'numpy>=1.16.6,<1.20.0',
-                        'scipy>=1.3.0',
-                        'scikit-image>=0.14.0,!=0.16.0.*,!=0.16.1.*,!=0.16.2.*,!=0.17.1.*,!=0.17.2.*',
-                        'scikit-learn',
-                        'tqdm'],
+      install_requires=[
+          'cython>=0.28.0',
+          'opencv-python-headless<=4.2.0.32; python_version < "3"',
+          'opencv-python-headless; python_version >= "3"',
+          'pandas',
+          'networkx>=2.1',
+          'numpy>=1.16.6,<1.20.0',
+          'scipy>=1.3.0',
+          'scikit-image>=0.14.0,!=0.16.0.*,!=0.16.1.*,!=0.16.2.*,!=0.17.1.*,!=0.17.2.*',
+          'scikit-learn',
+          'tqdm'],
       extras_require={
           'tests': ['pytest<6',
                     'pytest-pep8',