diff --git a/composer.json b/composer.json
index 6b51046..b19cb2f 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,8 @@
         "hashids/hashids": "5.0.x-dev",
         "phpmailer/phpmailer": "dev-master",
         "topthink/think-helper": "^3.1",
-        "topthink/think-worker": "5.0.x-dev"
+        "topthink/think-worker": "5.0.x-dev",
+        "dragonmantank/cron-expression": "^3.0@dev"
     },
     "require-dev": {
         "topthink/think-dumper": "^1.0",