diff --git a/api/src/data/schemas/public/short_url.py b/api/src/data/schemas/public/short_url.py
index c9ba579..5b04e65 100644
--- a/api/src/data/schemas/public/short_url.py
+++ b/api/src/data/schemas/public/short_url.py
@@ -29,6 +29,9 @@ class ShortUrl(DbModelABC):
         self._description = description
         self._group_id = group_id
         self._domain_id = domain_id
+
+        if loading_screen is None or loading_screen == "":
+            loading_screen = False
         self._loading_screen = loading_screen
 
     @property
diff --git a/api/src/redirector.py b/api/src/redirector.py
index 67d9e05..6f11a03 100644
--- a/api/src/redirector.py
+++ b/api/src/redirector.py
@@ -164,7 +164,9 @@ async def _track_visit(r: Request, short_url: dict):
 
 
 def _get_redirect_url(url: str) -> str:
-    if not url.startswith("http://") and not url.startswith("https://"):
+    protocols = Environment.get("PROTOCOLS", list[str], ["http", "https"])
+
+    if not any(url.startswith(f"{protocol}://") for protocol in protocols):
         url = f"http://{url}"
 
     return url