diff --git a/README.md b/README.md
index f2285f36..1037ab00 100644
--- a/README.md
+++ b/README.md
@@ -421,7 +421,7 @@ Another way to look at performance vs scalability:
 ### Source(s) and further reading
 
 * [A word on scalability](http://www.allthingsdistributed.com/2006/03/a_word_on_scalability.html)
-* [Scalability, availability, stability, patterns](http://www.slideshare.net/jboner/scalability-availability-stability-patterns/)
+* [Scalability, availability, stability, patterns](https://tehlug.org/events/presentations/183/scalability_patterns.pdf)
 
 ## Latency vs throughput