diff --git a/composer.json b/composer.json
index ced94b2..7a3038c 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,8 @@
         "overtrue/easy-sms": "dev-master",
         "yiisoft/yii2-redis": "2.0.x-dev",
         "phpoffice/phpexcel": "*",
-        "moonlandsoft/yii2-phpexcel": "2.*"
+        "moonlandsoft/yii2-phpexcel": "2.*",
+        "ext-bcmath": "*"
     },
     "require-dev": {
         "yiisoft/yii2-debug": "~2.1.0",