diff --git a/net/x25/Kconfig b/net/x25/Kconfig
index e3ed23245a82ebb5c6658dbc3f76a516b6021c56..68729aa3a5d53d03fb07a6e0f8fa68412d46c9ab 100644
--- a/net/x25/Kconfig
+++ b/net/x25/Kconfig
@@ -17,7 +17,7 @@ config X25
 	  if you want that) and the lower level data link layer protocol LAPB
 	  (say Y to "LAPB Data Link Driver" below if you want that).
 
-	  You can read more about X.25 at <http://www.sangoma.com/tutorials/x25/> and
+	  You can read more about X.25 at <https://www.sangoma.com/tutorials/x25/> and
 	  <http://docwiki.cisco.com/wiki/X.25>.
 	  Information about X.25 for Linux is contained in the files
 	  <file:Documentation/networking/x25.rst> and