diff --git a/setup.py b/setup.py
index f8db423..b215f5f 100644
--- a/setup.py
+++ b/setup.py
@@ -9,75 +9,77 @@ with open('README.md', 'rt') as f:
 with open('masque/VERSION.py', 'rt') as f:
     version = f.readlines()[2].strip()
 
-setup(name='masque',
-      version=version,
-      description='Lithography mask library',
-      long_description=long_description,
-      long_description_content_type='text/markdown',
-      author='Jan Petykiewicz',
-      author_email='jan@mpxd.net',
-      url='https://mpxd.net/code/jan/masque',
-      packages=find_packages(),
-      package_data={
-          'masque': ['py.typed',
-                     ]
-      },
-      install_requires=[
-          'numpy',
-          'klamath>=1.0',
-      ],
-      extras_require={
-          'gdsii': ['python-gdsii'],
-          'oasis': ['fatamorgana>=0.7'],
-          'dxf': ['ezdxf'],
-          'svg': ['svgwrite'],
-          'visualization': ['matplotlib'],
-          'text': ['freetype-py', 'matplotlib'],
-      },
-      classifiers=[
-            'Programming Language :: Python :: 3',
-            'Development Status :: 4 - Beta',
-            'Intended Audience :: Developers',
-            'Intended Audience :: Information Technology',
-            'Intended Audience :: Manufacturing',
-            'Intended Audience :: Science/Research',
-            'License :: OSI Approved :: GNU Affero General Public License v3',
-            'Topic :: Scientific/Engineering :: Electronic Design Automation (EDA)',
-            'Topic :: Scientific/Engineering :: Visualization',
-      ],
-      keywords=[
-          'layout',
-          'design',
-          'CAD',
-          'EDA',
-          'electronics',
-          'photonics',
-          'IC',
-          'mask',
-          'pattern',
-          'drawing',
-          'lithography',
-          'litho',
-          'geometry',
-          'geometric',
-          'polygon',
-          'curve',
-          'ellipse',
-          'oas',
-          'gds',
-          'dxf',
-          'svg',
-          'OASIS',
-          'gdsii',
-          'gds2',
-          'convert',
-          'stream',
-          'custom',
-          'visualize',
-          'vector',
-          'freeform',
-          'manhattan',
-          'angle',
-      ],
-      )
+setup(
+    name='masque',
+    version=version,
+    description='Lithography mask library',
+    long_description=long_description,
+    long_description_content_type='text/markdown',
+    author='Jan Petykiewicz',
+    author_email='jan@mpxd.net',
+    url='https://mpxd.net/code/jan/masque',
+    packages=find_packages(),
+    package_data={
+        'masque': [
+            'py.typed',
+            ],
+        },
+    install_requires=[
+        'numpy>=1.21',
+        'klamath>=1.0',
+        ],
+    extras_require={
+        'gdsii': ['python-gdsii'],
+        'oasis': ['fatamorgana>=0.11'],
+        'dxf': ['ezdxf'],
+        'svg': ['svgwrite'],
+        'visualization': ['matplotlib'],
+        'text': ['freetype-py', 'matplotlib'],
+        },
+    classifiers=[
+        'Programming Language :: Python :: 3',
+        'Development Status :: 4 - Beta',
+        'Intended Audience :: Developers',
+        'Intended Audience :: Information Technology',
+        'Intended Audience :: Manufacturing',
+        'Intended Audience :: Science/Research',
+        'License :: OSI Approved :: GNU Affero General Public License v3',
+        'Topic :: Scientific/Engineering :: Electronic Design Automation (EDA)',
+        'Topic :: Scientific/Engineering :: Visualization',
+        ],
+    keywords=[
+        'layout',
+        'design',
+        'CAD',
+        'EDA',
+        'electronics',
+        'photonics',
+        'IC',
+        'mask',
+        'pattern',
+        'drawing',
+        'lithography',
+        'litho',
+        'geometry',
+        'geometric',
+        'polygon',
+        'curve',
+        'ellipse',
+        'oas',
+        'gds',
+        'dxf',
+        'svg',
+        'OASIS',
+        'gdsii',
+        'gds2',
+        'convert',
+        'stream',
+        'custom',
+        'visualize',
+        'vector',
+        'freeform',
+        'manhattan',
+        'angle',
+        ],
+    )