diff --git a/Lectures/Presentations b/Lectures/Presentations
index 07f0c7eb..6f527dea 160000
--- a/Lectures/Presentations
+++ b/Lectures/Presentations
@@ -1 +1 @@
-Subproject commit 07f0c7ebd4bdf8725c8c26e1245260bdfdfa5f55
+Subproject commit 6f527dea2e681a5c87a7b7ab7a781fcf9e4ea520