diff --git a/backend/settings.py b/backend/settings.py
index ef97dc9..e616bb5 100644
--- a/backend/settings.py
+++ b/backend/settings.py
@@ -5,7 +5,7 @@ Getting and setting settings
 """
 
 import logging
-from json import dumps, loads
+from json import dump, load
 from typing import Any
 
 from backend.custom_exceptions import InvalidKeyValue, KeyNotFound
@@ -67,7 +67,10 @@ def _format_setting(key: str, value):
 		if not isinstance(value, str):
 			raise InvalidKeyValue(key, value)
 
-		if value:
+		if value == '/':
+			value = ''
+
+		elif value:
 			value = '/' + value.strip('/')
 
 	elif key == 'log_level' and not value in (logging.INFO, logging.DEBUG):
@@ -171,12 +174,16 @@ def update_manifest(url_base: str) -> None:
 	Args:
 		url_base (str): The url base to use in the file.
 	"""
-	with open(folder_path('frontend', 'static', 'json', 'pwa_manifest.json'), 'r+') as f:
-		manifest = loads(f.read())
+	filename = folder_path('frontend', 'static', 'json', 'pwa_manifest.json')
+
+	with open(filename, 'r') as f:
+		manifest = load(f)
 		manifest['start_url'] = url_base + '/'
 		manifest['icons'][0]['src'] = f'{url_base}/static/img/favicon.svg'
-		f.seek(0)
-		f.write(dumps(manifest, indent=4))
+
+	with open(filename, 'w') as f:
+		dump(manifest, f, indent=4)
+
 	return
 
 def backup_hosting_settings() -> None:
@@ -228,5 +235,7 @@ def restore_hosting_settings() -> None:
 		"UPDATE config SET value = ? WHERE key = ?",
 		((v, k) for k, v in hosting_settings.items())
 	)
-	
+
+	update_manifest(hosting_settings['url_prefix'])
+
 	return