diff --git a/backend/package.json b/backend/package.json
index ade577c..dfd797f 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.7.0",
+  "version": "2.7.1",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and ShadowRocket.",
   "main": "src/main.js",
   "scripts": {
diff --git a/backend/src/utils/migration.js b/backend/src/utils/migration.js
index 773b023..338a1e2 100644
--- a/backend/src/utils/migration.js
+++ b/backend/src/utils/migration.js
@@ -26,6 +26,9 @@ function doMigrationV2() {
     // 1. migrate subscriptions
     const subs = $.read(SUBS_KEY) || {};
     const newSubs = Object.values(subs).map((sub) => {
+        // set default source to remote
+        sub.source = sub.source || 'remote';
+
         migrateDisplayName(sub);
         migrateProcesses(sub);
         return sub;
@@ -54,7 +57,7 @@ function doMigrationV2() {
 
     // 5. delete builtin rules
     delete $.cache.builtin;
-    $.info('Migration complete!');
+    $.info('Migration complete!');    
 
     function migrateDisplayName(item) {
         const displayName = item['display-name'];
@@ -106,7 +109,7 @@ function doMigrationV2() {
                         break;
                 }
             } else if (p.type.indexOf('Keyword') !== -1) {
-                // do nothing
+                // drop keyword operators and keyword filters
             } else {
                 newProcesses.push(p);
             }