diff --git a/modules/context/auth.go b/modules/context/auth.go
index 57fe3350c..0c3ba3b1d 100755
--- a/modules/context/auth.go
+++ b/modules/context/auth.go
@@ -156,7 +156,7 @@ func Toggle(options *ToggleOptions) macaron.Handler {
 					redirectUrl = ctx.Req.URL.RequestURI()
 				}
 				ctx.SetCookie("redirect_to", setting.AppSubURL+redirectUrl, 0, setting.AppSubURL)
-				ctx.JSON(200, map[string]interface{}{
+				ctx.JSON(200, map[string]string{
 					"WechatRedirectUrl": setting.AppSubURL + "/authentication/wechat/bind",
 				})
 			}