diff --git a/bincio/serve/server.py b/bincio/serve/server.py
index 4dbb948..403db96 100644
--- a/bincio/serve/server.py
+++ b/bincio/serve/server.py
@@ -234,7 +234,7 @@ async def _on_startup() -> None:
 app.add_middleware(GZipMiddleware, minimum_size=1024)
 app.add_middleware(
     CORSMiddleware,
-    allow_origin_regex=r"https?://localhost(:\d+)?",
+    allow_origin_regex=r"https?://localhost(:\d+)?|https://[a-z0-9-]+\.bincio\.org",
     allow_credentials=True,
     allow_methods=["GET", "POST", "DELETE"],
     allow_headers=["Content-Type"],