diff --git a/README.md b/README.md
index 9612608..e368779 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,2 @@
 The gh-pages branch contains the NuLib2 web site.  This is accessible as
-https://fadden.github.io/nulib2/, or http://nulib.com/.
+https://fadden.github.io/nulib2/, or https://nulib.com/.