diff --git a/tools/boostbook b/tools/boostbook
index 2f9b23ea4d..87d1168f84 160000
--- a/tools/boostbook
+++ b/tools/boostbook
@@ -1 +1 @@
-Subproject commit 2f9b23ea4de479518781b59b4f57cd480e4308c0
+Subproject commit 87d1168f84aa1bf12a664c59586f9fd18bd3857e