diff --git a/scripts/injector.js b/scripts/injector.js
index c0acddd..2f266d5 100644
--- a/scripts/injector.js
+++ b/scripts/injector.js
@@ -5,8 +5,6 @@ hexo.extend.filter.register('theme_inject', function (injects) {
hexo.extend.injector.register('head_begin', '', 'default');
-hexo.extend.injector.register('head_begin', '', 'default');
-
hexo.extend.injector.register('head_begin', '', 'default');
hexo.extend.injector.register('head_begin', ' ', 'default');