diff --git a/lectures b/lectures
index f4406b8..a823876 160000
--- a/lectures
+++ b/lectures
@@ -1 +1 @@
-Subproject commit f4406b818a8e3d1e9814ec6487184062513c2ca8
+Subproject commit a8238762b8c0dd323d87f909893b8ee48f41631e