diff --git a/doc b/doc
index 1b40fefb791..a1c91e1af2c 160000
--- a/doc
+++ b/doc
@@ -1 +1 @@
-Subproject commit 1b40fefb791e8e571169451d2670204ef5cac1be
+Subproject commit a1c91e1af2c4761e10055991d16e0f8edaa35e61