diff --git a/backend/src/routers/signs.py b/backend/src/routers/signs.py
index c2c245e..8eb7f18 100644
--- a/backend/src/routers/signs.py
+++ b/backend/src/routers/signs.py
@@ -120,4 +120,5 @@ async def download_all(Authorize: AuthJWT = Depends(), session: AsyncSession = D
         for path in paths:
             zip_file.write(f"{settings.DATA_PATH}/{path}", os.path.basename(path))
 
-    return FileResponse(zip_path, media_type="application/zip", filename="signs.zip")
+    # return the zip file and delete it after the request is done
+    return FileResponse(zip_path, media_type="application/zip", filename="signs.zip", delete_after_request=True)
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