diff --git a/bin/chat-fastapi.py b/bin/chat-fastapi.py
index eb4679c..287c8ec 100644
--- a/bin/chat-fastapi.py
+++ b/bin/chat-fastapi.py
@@ -71,7 +71,8 @@ async def verify_captcha_middleware(request: Request, call_next):
         response = await call_next(request)
         return response
 
-    if request.url.scheme == "http":
+    host = request.headers.get('referer')
+    if host and host.startswith("http:"):
         url = request.url.replace(scheme="https")
         return RedirectResponse(url=str(url))