diff --git a/lectures b/lectures
index a823876..e72e8df 160000
--- a/lectures
+++ b/lectures
@@ -1 +1 @@
-Subproject commit a8238762b8c0dd323d87f909893b8ee48f41631e
+Subproject commit e72e8df7a5ed3403549b886083b46de29a078aee