diff --git a/setup.py b/setup.py
index 67a9267..631daf0 100644
--- a/setup.py
+++ b/setup.py
@@ -11,24 +11,35 @@
 
 
 arc_ext = Extension(
-            'arc.arc_c_extensions',
-            sources = ['arc/arc_c_extensions.c'],
-            extra_compile_args = ['-Wall','-O3'],
-            include_dirs=get_numpy_include_dirs(),
-        )
+    "arc.arc_c_extensions",
+    sources=["arc/arc_c_extensions.c"],
+    extra_compile_args=["-Wall", "-O3"],
+    include_dirs=get_numpy_include_dirs(),
+)
 
 
 setup(
     name="ARC-Alkali-Rydberg-Calculator",
-    version="3.0.20",
+    version="3.0.21",
     description="Alkali Rydberg Calculator",
-    long_description=open('README.md').read(),
-    long_description_content_type='text/markdown',
+    long_description=open("README.md").read(),
+    long_description_content_type="text/markdown",
     license="BSD3",
-    keywords=["rydberg", "physics", "stark maps", "atom interactions",
-              "quantum optics", "van der Waals", "scientific","atomic sensors",
-              "quantum simulator","alkali atoms","alkaline atoms","divalent atoms",
-              "quantum computing"],
+    keywords=[
+        "rydberg",
+        "physics",
+        "stark maps",
+        "atom interactions",
+        "quantum optics",
+        "van der Waals",
+        "scientific",
+        "atomic sensors",
+        "quantum simulator",
+        "alkali atoms",
+        "alkaline atoms",
+        "divalent atoms",
+        "quantum computing",
+    ],
     classifiers=[
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
@@ -37,26 +48,23 @@
         "License :: OSI Approved :: BSD License",
         "Topic :: Scientific/Engineering",
         "Topic :: Scientific/Engineering :: Physics",
-        "Development Status :: 5 - Production/Stable"
+        "Development Status :: 5 - Production/Stable",
     ],
     url="https://github.com/nikolasibalic/ARC-Alkali-Rydberg-Calculator",
-    download_url="https://github.com/nikolasibalic/ARC-Alkali-Rydberg-Calculator/archive/refs/tags/v3.0.20.tar.gz",
-    author = 'Nikola Sibalic,  Elizabeth J. Robertson, Jonathan D. Pritchard, Robert M. Potvliege, Matthew P. A. Jones, Charles S. Adams, Kevin J. Weatherill',
-    author_email = 'nikolasibalic@physics.org',
-
-    packages=['arc','arc.advanced'],
-
-    package_data={'arc': ['data/*', 'data/refractive_index_data/*', 'arc_c_extensions.c']},
-
+    download_url="https://github.com/nikolasibalic/ARC-Alkali-Rydberg-Calculator/archive/refs/tags/v3.0.21.tar.gz",
+    author="Nikola Sibalic,  Elizabeth J. Robertson, Jonathan D. Pritchard, Robert M. Potvliege, Matthew P. A. Jones, Charles S. Adams, Kevin J. Weatherill",
+    author_email="nikolasibalic@physics.org",
+    packages=["arc", "arc.advanced"],
+    package_data={
+        "arc": ["data/*", "data/refractive_index_data/*", "arc_c_extensions.c"]
+    },
     install_requires=[
-       'scipy>=0.18.1',
-       'numpy>=1.16.0',
-       'matplotlib>=1.5.3',
-       'sympy>=1.1.1',
-       'lmfit>=0.9.0'
+        "scipy>=0.18.1",
+        "numpy>=1.16.0",
+        "matplotlib>=1.5.3",
+        "sympy>=1.1.1",
+        "lmfit>=0.9.0",
     ],
-
     zip_safe=False,
     ext_modules=[arc_ext],
-
 )