diff --git a/tools/boostbook b/tools/boostbook
index c42075541b..aa3d1d676c 160000
--- a/tools/boostbook
+++ b/tools/boostbook
@@ -1 +1 @@
-Subproject commit c42075541b76e9d0e8062e3a61b6eeb2372f881b
+Subproject commit aa3d1d676ce2d921dc820bbea9ed38a39a279402