diff --git a/composer.json b/composer.json
index 272e516..503762b 100644
--- a/composer.json
+++ b/composer.json
@@ -8,7 +8,9 @@
         }
     ],
     "license": "Apache-2.0",
-    "require": {},
+    "require": {
+    	"topthink/framework": "5.1.x-dev"
+    },
     "autoload": {
         "psr-4": {
             "think\\captcha\\": "src/"