diff --git a/Lectures/Presentations b/Lectures/Presentations
index 45929dc..3f49b25 160000
--- a/Lectures/Presentations
+++ b/Lectures/Presentations
@@ -1 +1 @@
-Subproject commit 45929dc43b7162b3b7b899a9fc2871ff4979fc59
+Subproject commit 3f49b251bcc55860bd37350bb772b25a2a7ff008