diff --git a/en-US/Design.xml b/en-US/Design.xml
index 984a7bd..7cb65a0 100644
--- a/en-US/Design.xml
+++ b/en-US/Design.xml
@@ -751,7 +751,7 @@ telemetry-operator.v1.0.0               Telemetry Operator             ... -->
 			 <itemizedlist>
 				<listitem>
 					<para>
-						Use <ulink url="http://rfc-editor.org/info/rfc2606">RFC 2606</ulink> to find suitable domain names.
+							Use <ulink url="https://www.rfc-editor.org/info/rfc2606">RFC 2606</ulink> to find suitable domain names.
             For documentation and example purposes, it is typically <systemitem>example.com</systemitem>, <systemitem>example.net</systemitem>, <systemitem>example.org</systemitem>, and <systemitem>example.edu</systemitem>.
 					</para>
 					 <important>