diff --git a/controllers/event.go b/controllers/event.go
index 032b67826..2cb739b22 100644
--- a/controllers/event.go
+++ b/controllers/event.go
@@ -71,7 +71,7 @@ func (c *EventController) GetWeixinUnlimited() {
 	c.callGetWeixinUnlimited(func(params *tEventGetWeixinUnlimitedParams) (retVal interface{}, errCode string, err error) {
 		api.WeixinMiniAPI2.CBRetrieveToken()
 		result, err := api.WeixinMiniAPI2.GetUnlimited(params.Scene, params.Page)
-		retVal = base64.StdEncoding.EncodeToString(result["fakeData"].([]byte))
+		retVal = base64.StdEncoding.EncodeToString([]byte(result["fakeData"].(string)))
 		// tasks.RefreshWeixinToken()
 		return retVal, "", err
 	})