diff --git a/README.md b/README.md
index c1eea22a2..968d6e8f6 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ This page is available as an easy-to-read website. Access it by clicking on [![h
 
 ## Intro
 
-This list was originally a clone of [StackOverflow - List of Freely Available Programming Books](https://web.archive.org/web/20140606191453/http://stackoverflow.com/questions/194812/list-of-freely-available-programming-books/392926) with contributions from Karan Bhangui and George Stocker.
+This list was originally a clone of [StackOverflow - List of Freely Available Programming Books](https://web.archive.org/web/20140606191453/https://stackoverflow.com/questions/194812/list-of-freely-available-programming-books/392926) with contributions from Karan Bhangui and George Stocker.
 
 The list was moved to GitHub by Victor Felder for collaborative updating and maintenance. It has grown to become one of [GitHub's most popular repositories](https://octoverse.github.com/).