diff --git a/src/rupload/app.py b/src/rupload/app.py
index 72b70f6..30d526f 100644
--- a/src/rupload/app.py
+++ b/src/rupload/app.py
@@ -271,7 +271,7 @@ async def handle_upload(request: web.Request):
 async def handle_thumbnail(request: web.Request):
     path = request.match_info["path"]
     
-    safe_path = pathlib.Path(request.app.upload_path).joinpath(path)
+    safe_path = pathlib.Path(path)
     
     if not safe_path.exists():
         return web.Response(status=404, text="File not found.")