diff --git a/src/component/CaptchaComp.js b/src/component/CaptchaComp.js
index d31cbe7..d98eb26 100644
--- a/src/component/CaptchaComp.js
+++ b/src/component/CaptchaComp.js
@@ -39,7 +39,7 @@ class CaptchaComp {
 
     getUrl(params) {
         if (params.id) {
-            let params = Object.assign(this.params.res, { id: params.id })
+            params = Object.assign(this.params.res, { id: params.id })
             let o = new url.URL(this.api.res)
             o.search = new url.URLSearchParams(params).toString();
             return o