diff --git a/app.py b/app.py
index e7ea792..21d454c 100644
--- a/app.py
+++ b/app.py
@@ -73,9 +73,14 @@ def clean_task():
 
 
 if __name__ == '__main__':
-    if not check_is_none(config.ngrok_config.auth_token):
-        listener = ngrok.forward(config.http_service.port, authtoken=config.ngrok_config.auth_token)
-
-        logging.info(f"Ingress established at {listener.url()}")
+    try:
+        if not check_is_none(config.ngrok_config.auth_token):
+            listener = ngrok.forward(config.http_service.port, authtoken=config.ngrok_config.auth_token)
+
+            logging.info(f"Ingress established at {listener.url()}")
+        else:
+            logging.info(f"Not using ngrok.")
+    except Exception as e:
+        logging.error(f"Not using ngrok. Authtoken error:{e}")
 
     app.run(host=config.http_service.host, port=config.http_service.port, debug=config.http_service.debug)
diff --git a/config.py b/config.py
index 63c9773..012e889 100644
--- a/config.py
+++ b/config.py
@@ -90,16 +90,17 @@ def update_config(self, new_config_dict):
                         nested_config.update_config(new_value)
                         setattr(self, field_name, nested_config)
                 else:
-                    if field_type == bool:
-                        new_value = str(new_value).lower() == "true"
-                    elif field_type == int:
-                        new_value = int(new_value)
-                    elif field_type == float:
-                        new_value = float(new_value)
-                    elif field_type == str:
-                        new_value = str(new_value)
-                    elif field_type == torch.device:
-                        new_value = torch.device(new_value)
+                    if new_value is not None:
+                        if field_type == bool:
+                            new_value = str(new_value).lower() == "true"
+                        elif field_type == int:
+                            new_value = int(new_value)
+                        elif field_type == float:
+                            new_value = float(new_value)
+                        elif field_type == str:
+                            new_value = str(new_value)
+                        elif field_type == torch.device:
+                            new_value = torch.device(new_value)
 
                     setattr(self, field_name, new_value)