diff --git a/appview/podcastindex/client.go b/appview/podcastindex/client.go
index 9a70e43..ba98d95 100644
--- a/appview/podcastindex/client.go
+++ b/appview/podcastindex/client.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"maps"
 	"net/http"
 	"net/url"
 	"strconv"
@@ -36,9 +37,7 @@ func (c *Client) get(path string, params url.Values) (json.RawMessage, error) {
 	if err != nil {
 		return nil, err
 	}
-	for k, v := range authHeaders(c.apiKey, c.apiSecret) {
-		req.Header[k] = v
-	}
+	maps.Copy(req.Header, authHeaders(c.apiKey, c.apiSecret))
 
 	resp, err := c.http.Do(req)
 	if err != nil {