diff --git a/src/model_fetcher.py b/src/model_fetcher.py
index d3cba28..86493e1 100644
--- a/src/model_fetcher.py
+++ b/src/model_fetcher.py
@@ -1,18 +1,23 @@
 from __future__ import annotations
 
 from pathlib import Path
-
+from typing import TypedDict, Dict
 import requests
 
+class ModelInfo(TypedDict):
+    model_name: str
+    url: str
 
-def download_model(model_name, url):
+def download_model(model_info: ModelInfo) -> None:
     """
     Download a model file if it doesn't already exist.
 
     Args:
-        model_name (str): The name of the model file.
-        url (str): The URL of the model file.
+        model_info (ModelInfo): The model information including name and URL.
     """
+    model_name = model_info['model_name']
+    url = model_info['url']
+
     # Define the local directory to store the model files
     LOCAL_MODEL_DIRECTORY = Path('models/pt/')
 
@@ -23,9 +28,7 @@ def download_model(model_name, url):
 
     # Check if the model already exists
     if local_file_path.exists():
-        print(
-            f"'{model_name}' exists. Skipping download.",
-        )
+        print(f"'{model_name}' exists. Skipping download.")
         return
 
     # Send an HTTP GET request to fetch the model file
@@ -35,28 +38,24 @@ def download_model(model_name, url):
         with open(local_file_path, 'wb') as f:
             for chunk in response.iter_content(chunk_size=8192):
                 f.write(chunk)
-        print(
-            f"'{model_name}' saved to '{local_file_path}'.",
-        )
+        print(f"'{model_name}' saved to '{local_file_path}'.")
     else:
-        print(
-            f"Error downloading '{model_name}': {response.status_code}",
-        )
+        print(f"Error downloading '{model_name}': {response.status_code}")
 
-
-def main():
+def main() -> None:
     # Define the URLs for the model files
-    MODEL_URLS = {
-        'best_yolov8l.pt':
-            'http://changdar-server.mooo.com:28000/models/best_yolov8l.pt',
-        'best_yolov8x.pt':
-            'http://changdar-server.mooo.com:28000/models/best_yolov8x.pt',
+    MODEL_URLS: Dict[str, str] = {
+        'best_yolov8l.pt': 'http://changdar-server.mooo.com:28000/models/best_yolov8l.pt',
+        'best_yolov8x.pt': 'http://changdar-server.mooo.com:28000/models/best_yolov8x.pt',
     }
 
     # Iterate over all models and download them if they don't already exist
     for model_name, url in MODEL_URLS.items():
-        download_model(model_name, url)
-
+        model_info: ModelInfo = {
+            'model_name': model_name,
+            'url': url,
+        }
+        download_model(model_info)
 
 if __name__ == '__main__':
     main()