diff --git a/lectures b/lectures
index fde2184..f4406b8 160000
--- a/lectures
+++ b/lectures
@@ -1 +1 @@
-Subproject commit fde218456652da49044434f1dd829b34379b5ac4
+Subproject commit f4406b818a8e3d1e9814ec6487184062513c2ca8