diff --git a/TODO b/TODO
index 812cfb4..f42a3aa 100644
--- a/TODO
+++ b/TODO
@@ -101,7 +101,7 @@ videos:
     https://www.youtube.com/watch?v=fHNmRkzxHWs
 
     Performance Engineering of Software Systems
-    http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-172-performance-engineering-of-software-systems-fall-2010/
+    https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-172-performance-engineering-of-software-systems-fall-2018/
 
     https://talks.golang.org/2013/highperf.slide#1