diff --git a/message.go b/message.go
index c8a0258..cfb7a6b 100644
--- a/message.go
+++ b/message.go
@@ -176,7 +176,7 @@ type ApnsPayload struct {
 	Aps ApnsPayloadKeys `json:"aps"`
 
 	// TODO: add support for custom keys
-	// https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/generating_a_remote_notification
+	// https://developer.apple.com/documentation/usernotifications/generating-a-remote-notification
 	customKeys map[string]any
 }