diff --git a/api/panel/node.go b/api/panel/node.go
index d69a533..8a4ea4e 100644
--- a/api/panel/node.go
+++ b/api/panel/node.go
@@ -68,11 +68,14 @@ type NodeInfo struct {
 
 func (c *Client) GetNodeInfo() (node *NodeInfo, err error) {
 	const path = "/api/v1/server/UniProxy/config"
-	r, err := c.client.R().Get(path)
+	r, err := c.client.
+		R().
+		SetHeader("If-None-Match", c.etag).
+		Get(path)
 	if err = c.checkResponse(r, path, err); err != nil {
 		return
 	}
-	if c.etag == r.Header().Get("ETag") { // node info not changed
+	if r.StatusCode() == 304 {
 		return nil, nil
 	}
 	// parse common params
diff --git a/api/panel/node_test.go b/api/panel/node_test.go
index dea16e8..570182f 100644
--- a/api/panel/node_test.go
+++ b/api/panel/node_test.go
@@ -23,6 +23,7 @@ func init() {
 
 func TestClient_GetNodeInfo(t *testing.T) {
 	log.Println(client.GetNodeInfo())
+	log.Println(client.GetNodeInfo())
 }
 
 func TestClient_ReportUserTraffic(t *testing.T) {
diff --git a/api/panel/utils.go b/api/panel/utils.go
index 938bec9..74ef5b3 100644
--- a/api/panel/utils.go
+++ b/api/panel/utils.go
@@ -18,7 +18,7 @@ func (c *Client) checkResponse(res *resty.Response, path string, err error) erro
 	if err != nil {
 		return fmt.Errorf("request %s failed: %s", c.assembleURL(path), err)
 	}
-	if res.StatusCode() != 200 {
+	if res.StatusCode() >= 400 {
 		body := res.Body()
 		return fmt.Errorf("request %s failed: %s", c.assembleURL(path), string(body))
 	}