diff --git a/composer.json b/composer.json
index f8df18dad..21e611ccb 100644
--- a/composer.json
+++ b/composer.json
@@ -11,6 +11,7 @@
   "autoload": {"psr-4": {"app\\": "application"}},
   "require": {
     "php": ">=5.6.0",
+    "php-iconv": "*",
     "qiniu/php-sdk": "^7.2",
     "endroid/qr-code": "^1.9",
     "topthink/framework": "^5.1",