diff --git a/README.md b/README.md
index 4035bd03c1d8b..988cd08cdbbac 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ irc.mozilla.org.
 
 ### Online demo
 
-+ http://mozilla.github.io/pdf.js/web/viewer.html
++ https://mozilla.github.io/pdf.js/web/viewer.html
 
 ### Browser Extensions