diff --git a/en-US/Design.xml b/en-US/Design.xml
index a970b4a..d348298 100644
--- a/en-US/Design.xml
+++ b/en-US/Design.xml
@@ -17,7 +17,7 @@
The standard for all Red Hat technical documentation is title case for all headings and titles.
Diagram labels, table headings, procedure, and formal paragraph titles all fall under this heading, and consequently, standard title case capitalization rules apply.
- The currently accepted reference for determining title case is http://titlecase.com.
+ The currently accepted reference for determining title case is https://titlecase.com/titlecase.