diff --git a/hecl/extern/boo b/hecl/extern/boo
index 40e94f88e..165b40448 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 40e94f88e008ee8ed36b4f7bff2bd005c5b7bb4a
+Subproject commit 165b40448fa651ab56891ec7f4e3f149f8db7ecf