diff --git a/Additional-Learning-Resources.md b/Additional-Learning-Resources.md
index 8da4973..2474d9b 100644
--- a/Additional-Learning-Resources.md
+++ b/Additional-Learning-Resources.md
@@ -18,12 +18,12 @@ Videos:
 Slides:
 + https://jviereck.github.com/slides/2012_07_berlinjs/index.html
 + Yury Delendik - TTF 2012, [Evolving with Web Standards. The Story of PDF.JS.](https://web.archive.org/web/20161223213252if_/https://people.mozilla.com/~ydelendik/pdfjs-ttf-2012.pdf)
-+ Brendan Dahl - HTML5DevConf 2013, http://brendandahl.github.io/speaking-events/2013-html5-dev-conf
++ Brendan Dahl - HTML5DevConf 2013, https://brendandahl.github.io/speaking-events/2013-html5-dev-conf
 
 ## PDF-related resources
 
 A really basic overview of PDF is described here:
-+ http://partners.adobe.com/public/developer/en/livecycle/lc_pdf_overview_format.pdf
++ https://web.archive.org/web/20150218210352if_/http://partners.adobe.com/public/developer/en/livecycle/lc_pdf_overview_format.pdf
 
 Summary of the PDF file format:
 + http://www.planetpdf.com/developer/article.asp?ContentID=navigating_the_internal_struct