diff --git a/lectures b/lectures
index acffa8c..2865963 160000
--- a/lectures
+++ b/lectures
@@ -1 +1 @@
-Subproject commit acffa8cef796e484afef5cf72c9afd4ecc4f1c54
+Subproject commit 286596391c2243ee493d58e3c3898d89ae9bf5a9