diff --git a/bucket/bbdown.json b/bucket/bbdown.json
index b2a40a3ad9..5a22e08073 100644
--- a/bucket/bbdown.json
+++ b/bucket/bbdown.json
@@ -15,6 +15,7 @@
         }
     },
     "bin": "BBDown.exe",
+    "persist": "BBDown.data",
     "checkver": {
         "url": "https://api.github.com/repos/nilaoda/BBDown/releases",
         "jsonpath": "$[0].assets",