diff --git a/docs/libcurl/opts/CURLOPT_CONNECT_TO.3 b/docs/libcurl/opts/CURLOPT_CONNECT_TO.3
index 316a7d5fc..9f80cc383 100644
--- a/docs/libcurl/opts/CURLOPT_CONNECT_TO.3
+++ b/docs/libcurl/opts/CURLOPT_CONNECT_TO.3
@@ -9,7 +9,7 @@
 .\" *
 .\" * This software is licensed as described in the file COPYING, which
 .\" * you should have received as part of this distribution. The terms
-.\" * are also available at http://curl.haxx.se/docs/copyright.html.
+.\" * are also available at https://curl.haxx.se/docs/copyright.html.
 .\" *
 .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 .\" * copies of the Software, and permit persons to whom the Software is