diff --git a/lectures b/lectures
index 5c7fa31..97c198a 160000
--- a/lectures
+++ b/lectures
@@ -1 +1 @@
-Subproject commit 5c7fa313cfd110741c972f43488521d310fb85c9
+Subproject commit 97c198a084ef1a9595b62de34bc55926739f8bda