diff --git a/lectures b/lectures
index 2865963..59a7b4c 160000
--- a/lectures
+++ b/lectures
@@ -1 +1 @@
-Subproject commit 286596391c2243ee493d58e3c3898d89ae9bf5a9
+Subproject commit 59a7b4c9313ac31dafd304533934240511089628