diff --git a/Lectures/Presentations b/Lectures/Presentations
index b030af6..dd6e7f2 160000
--- a/Lectures/Presentations
+++ b/Lectures/Presentations
@@ -1 +1 @@
-Subproject commit b030af68d13f537872ea3ebca9179c6ad638954e
+Subproject commit dd6e7f205f41bb798379f084925e53d18b12db06