diff --git a/client_https.go b/client_https.go
index ad4127e..c326b81 100644
--- a/client_https.go
+++ b/client_https.go
@@ -1,59 +1,59 @@
-package main
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"io"
-	"net/http"
-	"time"
-
-	"github.com/miekg/dns"
-)
-
-type httpclient struct {
-	Net        string
-	Timeout    time.Duration
-	HTTPClient *http.Client
-}
-
-func (c *httpclient) Exchange(msg *dns.Msg, upstream string) (*dns.Msg, int, error) {
-	data, err := msg.Pack()
-	if err != nil {
-		return nil, 0, err
-	}
-
-	req, err := http.NewRequest("POST", upstream, bytes.NewReader(data))
-	if err != nil {
-		return nil, 0, err
-	}
-
-	req.Header.Set("Content-Type", dnsMsgType)
-
-	ctx, cancel := context.WithTimeout(context.Background(), c.Timeout)
-	defer cancel()
-
-	req = req.WithContext(ctx)
-
-	resp, err := c.HTTPClient.Do(req)
-	if err != nil {
-		return nil, 0, err
-	}
-	defer resp.Body.Close()
-
-	if resp.StatusCode != http.StatusOK {
-		return nil, 0, fmt.Errorf("http error %d", resp.StatusCode)
-	}
-
-	data, err = io.ReadAll(resp.Body)
-	if err != nil {
-		return nil, 0, err
-	}
-
-	m := new(dns.Msg)
-	if err = m.Unpack(data); err != nil {
-		return nil, 0, err
-	}
-
-	return m, 0, nil
-}
+package main
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+
+	"github.com/miekg/dns"
+)
+
+type httpclient struct {
+	Net        string
+	Timeout    time.Duration
+	HTTPClient *http.Client
+}
+
+func (c *httpclient) Exchange(msg *dns.Msg, upstream string) (*dns.Msg, int, error) {
+	data, err := msg.Pack()
+	if err != nil {
+		return nil, 0, err
+	}
+
+	req, err := http.NewRequest("POST", upstream, bytes.NewReader(data))
+	if err != nil {
+		return nil, 0, err
+	}
+
+	req.Header.Set("Content-Type", dnsMsgType)
+
+	ctx, cancel := context.WithTimeout(context.Background(), c.Timeout)
+	defer cancel()
+
+	req = req.WithContext(ctx)
+
+	resp, err := c.HTTPClient.Do(req)
+	if err != nil {
+		return nil, 0, err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, 0, fmt.Errorf("http error %d", resp.StatusCode)
+	}
+
+	data, err = io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	m := new(dns.Msg)
+	if err = m.Unpack(data); err != nil {
+		return nil, 0, err
+	}
+
+	return m, 0, nil
+}