diff --git a/jwk.py b/jwk.py
index 5c8165f..da9aed9 100644
--- a/jwk.py
+++ b/jwk.py
@@ -3,8 +3,8 @@
 
 
 jwk = JWK(algorithms=JWK_ALGORITHMS)
-with open('public.pem', 'r') as f:
+with open("public.pem", "r") as f:
     key = f.read()
-obj = jwk.dumps(key, kty='RSA', indent=4, sort_keys=True)
+obj = jwk.dumps(key, kty="RSA", indent=4, sort_keys=True)
 key_str = str(obj).replace("'", '"')
 print(key_str)
diff --git a/pgppubkey_to_jwk.py b/pgppubkey_to_jwk.py
index 22baa81..09febb3 100644
--- a/pgppubkey_to_jwk.py
+++ b/pgppubkey_to_jwk.py
@@ -4,14 +4,10 @@
 
 
 # Input is PGP armored pubkey
-key, _ = pgpy.PGPKey.from_file('key.asc')
+key, _ = pgpy.PGPKey.from_file("key.asc")
 n = int(key._key.keymaterial.n)
 e = int(key._key.keymaterial.e)
 
 # Expected JWK format according to https://tools.ietf.org/html/rfc7518#section-6.1
-pubkey = {
-    'kty': 'RSA',
-    'e': int_to_base64(e),
-    'n': int_to_base64(n)
-}
+pubkey = {"kty": "RSA", "e": int_to_base64(e), "n": int_to_base64(n)}
 print(json.dumps(pubkey))
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..aa4949a
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,2 @@
+[tool.black]
+line-length = 100