diff --git a/Lectures/Presentations b/Lectures/Presentations
index 480b999c..c66b5928 160000
--- a/Lectures/Presentations
+++ b/Lectures/Presentations
@@ -1 +1 @@
-Subproject commit 480b999cf20b7f8dc2454ee0bc70d86acabc143c
+Subproject commit c66b5928fa695cc0f44cfd811b5d770c65eeecaa