diff --git a/tools/boostbook b/tools/boostbook
index 2fccdae6be..46c7732d06 160000
--- a/tools/boostbook
+++ b/tools/boostbook
@@ -1 +1 @@
-Subproject commit 2fccdae6bef014ce9c4167bebc78cfe180edc8c9
+Subproject commit 46c7732d061a33381e6593139d10fb3d032845a4