diff --git a/services/sync/modules/constants.js b/services/sync/modules/constants.js
index 0970e1d3a9c1..6af0917d1602 100644
--- a/services/sync/modules/constants.js
+++ b/services/sync/modules/constants.js
@@ -43,7 +43,7 @@ const EXPORTED_SYMBOLS = ['WEAVE_VERSION', 'STORAGE_FORMAT_VERSION',
 			  'ONE_BYTE', 'ONE_KILOBYTE', 'ONE_MEGABYTE'];
 
 const WEAVE_VERSION = "0.1.27";
-const STORAGE_FORMAT_VERSION = 1;
+const STORAGE_FORMAT_VERSION = 2;
 const ENGINE_STORAGE_FORMAT_VERSION = 2;
 
 const PREFS_BRANCH = "extensions.weave.";