diff --git a/README.md b/README.md
index 91f86e9..446b130 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
 # PhD Defense Presentation
-[Online Version](0phoff.github.io/phd-defense)  
+[Online Version](https://0phoff.github.io/phd-defense)  
 [PDF Version](https://github.com/0phoff/phd-defense/blob/master/slides.pdf?raw=true)