diff --git a/src/index.js b/src/index.js
index 6482b16..0931176 100644
--- a/src/index.js
+++ b/src/index.js
@@ -133,6 +133,7 @@ const iview = {
 };
 
 const install = function(Vue, opts = {}) {
+    if (install.installed) return;
     locale.use(opts.locale);
     locale.i18n(opts.i18n);
 
--
libgit2 0.21.4