diff --git a/lectures b/lectures
index f9ffdf7..f09537b 160000
--- a/lectures
+++ b/lectures
@@ -1 +1 @@
-Subproject commit f9ffdf7e0fed0d6abbfc468de4f58f7efe2cd7f1
+Subproject commit f09537b866bfbdd70f54c00149152cca0560fa91