diff --git a/data/web/core.telegram.org/gateway/api.html b/data/web/core.telegram.org/gateway/api.html
index 111e694930..24321a7ee8 100644
--- a/data/web/core.telegram.org/gateway/api.html
+++ b/data/web/core.telegram.org/gateway/api.html
@@ -119,7 +119,7 @@
 <td>callback_url</td>
 <td>String</td>
 <td>Optional</td>
-<td>A URL where you want to receive <a href="#report-delivery">delivery reports</a> related to the sent message, 0-256 bytes.</td>
+<td>An HTTPS URL where you want to receive <a href="#report-delivery">delivery reports</a> related to the sent message, 0-256 bytes.</td>
 </tr>
 <tr>
 <td>payload</td>