diff --git a/lib/undo-tree b/lib/undo-tree
index 288669f..a2fff39 160000
--- a/lib/undo-tree
+++ b/lib/undo-tree
@@ -1 +1 @@
-Subproject commit 288669f43f3c5922ca47841c73c016e320c60130
+Subproject commit a2fff3959730c69a050543af07fe477dd83092ac