diff --git a/app/services/auth.py b/app/services/auth.py
index 3ac5199..c62b228 100644
--- a/app/services/auth.py
+++ b/app/services/auth.py
@@ -39,7 +39,7 @@ def create_access_token(data: dict, expires_delta: timedelta | None = None):
     if expires_delta:
         expire = datetime.now(timezone.utc) + expires_delta
     else:
-        expire = datetime.now(timezone.utc) + expires_delta(minutes=15)
+        expire = datetime.now(timezone.utc) + timedelta(minutes=15)
     to_encode.update({"exp": expire})
     encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
     return encoded_jwt