diff --git a/app/main.py b/app/main.py
index f1394b8..a29fd13 100644
--- a/app/main.py
+++ b/app/main.py
@@ -50,15 +50,15 @@ app.add_middleware(
     CORSMiddleware,
     allow_origins=CORS_ORIGINS,
     allow_credentials=True,
-    allow_methods=["*"],
-    allow_headers=["*"],
+    allow_methods=['*'],
+    allow_headers=['*'],
 )
 
 logger.setLevel(logging.DEBUG if DEBUG else logging.INFO)
 
 
 def get_token(request: Request) -> dict:
-    authorization_header = request.headers['authorization']
+    authorization_header = request.headers.get('authorization')
     token = authorization_header.split(' ')[1]
     return jwt.decode(token=token, key=jwt_decode_key, algorithms=ALGORITHMS.RS256, options={'verify_aud': False})
 
diff --git a/app/util.py b/app/util.py
index 2de1a57..ca3eec6 100644
--- a/app/util.py
+++ b/app/util.py
@@ -1,21 +1,28 @@
-try:
-    # Crypto | Cryptodome on Debian
-    from Crypto.PublicKey import RSA
-    from Crypto.PublicKey.RSA import RsaKey
-except ModuleNotFoundError:
-    from Cryptodome.PublicKey import RSA
-    from Cryptodome.PublicKey.RSA import RsaKey
-
-
 def load_file(filename) -> bytes:
     with open(filename, 'rb') as file:
         content = file.read()
     return content
 
 
-def load_key(filename) -> RsaKey:
+def load_key(filename) -> "RsaKey":
+    try:
+        # Crypto | Cryptodome on Debian
+        from Crypto.PublicKey import RSA
+        from Crypto.PublicKey.RSA import RsaKey
+    except ModuleNotFoundError:
+        from Cryptodome.PublicKey import RSA
+        from Cryptodome.PublicKey.RSA import RsaKey
+
     return RSA.import_key(extern_key=load_file(filename), passphrase=None)
 
 
-def generate_key() -> RsaKey:
+def generate_key() -> "RsaKey":
+    try:
+        # Crypto | Cryptodome on Debian
+        from Crypto.PublicKey import RSA
+        from Crypto.PublicKey.RSA import RsaKey
+    except ModuleNotFoundError:
+        from Cryptodome.PublicKey import RSA
+        from Cryptodome.PublicKey.RSA import RsaKey
+
     return RSA.generate(bits=2048)
diff --git a/test/main.py b/test/main.py
index abdeacf..50f242b 100644
--- a/test/main.py
+++ b/test/main.py
@@ -16,7 +16,7 @@ sys.path.append('../')
 sys.path.append('../app')
 
 from app import main
-from app.util import generate_key, load_key
+from app.util import load_key
 
 client = TestClient(main.app)