diff --git a/lectures b/lectures
index bf6a152..2bbabb4 160000
--- a/lectures
+++ b/lectures
@@ -1 +1 @@
-Subproject commit bf6a152d2927da8d13b0c2c63d78d2fb25d09ad2
+Subproject commit 2bbabb4068015db92fc96be5dbaba2de1a19963c