diff --git a/app/routers/maps.py b/app/routers/maps.py
index c78e022..543a5fc 100644
--- a/app/routers/maps.py
+++ b/app/routers/maps.py
@@ -42,7 +42,7 @@ async def get_map_by_crc(human_crc: Optional[str] = Query(None, min_length=8, ma
 
 @router.post("/maps", tags=["maps"], response_model=MapOut)
 async def upload_map(map_in: MapIn):
-    allowed_name = re.compile("[a-zA-Z-.\d()[] ]+.gck")
+    allowed_name = re.compile("[a-zA-Z-.\d\(\)\[\] ]+.gck")
     filename = map_in.name
     if not allowed_name.fullmatch(filename):
         raise HTTPException(status_code=400, detail="Invalid filename")