diff --git a/locales/zh/messages.json b/locales/zh_CN/messages.json
similarity index 100%
rename from locales/zh/messages.json
rename to locales/zh_CN/messages.json
diff --git a/package.json b/package.json
index 3bc24fb..1b24f5d 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
   "manifest": {
     "name": "__MSG_extension_name__",
     "description": "__MSG_description__",
-    "default_locale": "zh",
+    "default_locale": "zh_CN",
     "update_url": "https://store.fydeos.com/update/nfglebjgiflmmcdddkbcbgmdkomlfcpa/updates.xml",
     "web_accessible_resources": [
       {