diff --git a/lectures b/lectures
index b16875c..bf6a152 160000
--- a/lectures
+++ b/lectures
@@ -1 +1 @@
-Subproject commit b16875ca9a882d031215e89c1a1ee171c1994e8c
+Subproject commit bf6a152d2927da8d13b0c2c63d78d2fb25d09ad2