diff --git a/lectures b/lectures
index a134aaf..e72eb6d 160000
--- a/lectures
+++ b/lectures
@@ -1 +1 @@
-Subproject commit a134aafefdf727b1202341d6cdd806c5f64c87ad
+Subproject commit e72eb6d5e22fdef1e1121a37a3c115fcd45c8616