diff --git a/hecl/extern/boo b/hecl/extern/boo
index 18bb6e743..99519d388 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 18bb6e743997f38973dc5400514b615beff8af59
+Subproject commit 99519d3882d2346695f46a7136978a51cc261c42