diff --git a/calendar_registration.py b/calendar_registration.py
index 3713ef86..42d0534d 100644
--- a/calendar_registration.py
+++ b/calendar_registration.py
@@ -5,9 +5,6 @@ from google_auth_oauthlib.flow import InstalledAppFlow
 from google.oauth2.credentials import Credentials
 from google.auth.transport.requests import Request
 import pickle
-import webbrowser
-from http.server import HTTPServer, BaseHTTPRequestHandler
-import threading
 import urllib.parse
 import socket
 
@@ -23,32 +20,6 @@ def save_credentials(creds, token_path):
     with open(token_path, 'wb') as token:
         pickle.dump(creds, token)
 
-class OAuthHandler(BaseHTTPRequestHandler):
-    def do_GET(self):
-        # Parse the query parameters
-        query_components = urllib.parse.parse_qs(urllib.parse.urlparse(self.path).query)
-        
-        if 'code' in query_components:
-            # Store the authorization code
-            self.server.auth_code = query_components['code'][0]
-            
-            # Send success response to browser
-            self.send_response(200)
-            self.send_header('Content-type', 'text/html')
-            self.end_headers()
-            self.wfile.write(b"Authorization successful! You can close this window.")
-        else:
-            # Send error response
-            self.send_response(400)
-            self.send_header('Content-type', 'text/html')
-            self.end_headers()
-            self.wfile.write(b"Authorization failed! Please try again.")
-
-def get_free_port():
-    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
-        s.bind(('', 0))
-        return s.getsockname()[1]
-
 def main():
     config = load_config()
     calendar_config = config.get('calendar', {})
@@ -77,39 +48,23 @@ def main():
         print("6. Download the credentials and save as credentials.json")
         return
 
-    # Get a free port for the local server
-    port = get_free_port()
-    redirect_uri = f'http://localhost:{port}'
-
     # Create the flow using the client secrets file from the Google API Console
     flow = InstalledAppFlow.from_client_secrets_file(
         creds_file, SCOPES,
-        redirect_uri=redirect_uri
+        redirect_uri='urn:ietf:wg:oauth:2.0:oob'  # Use out-of-band flow for headless environment
     )
 
-    # Start local server to receive the OAuth callback
-    server = HTTPServer(('localhost', port), OAuthHandler)
-    server.auth_code = None
-    server_thread = threading.Thread(target=server.serve_forever)
-    server_thread.daemon = True
-    server_thread.start()
-
     # Generate URL for authorization
     auth_url, _ = flow.authorization_url(prompt='consent')
     
-    print("\nOpening your browser to authorize this application...")
-    webbrowser.open(auth_url)
+    print("\nPlease visit this URL to authorize this application:")
+    print(auth_url)
+    print("\nAfter authorizing, you will receive a code. Enter that code below:")
     
-    print("\nWaiting for authorization...")
-    while server.auth_code is None:
-        pass
-    
-    # Stop the server
-    server.shutdown()
-    server.server_close()
+    code = input("Enter the authorization code: ")
     
     # Exchange the authorization code for credentials
-    flow.fetch_token(code=server.auth_code)
+    flow.fetch_token(code=code)
     creds = flow.credentials
 
     # Save the credentials