diff --git a/hecl/extern/boo b/hecl/extern/boo
index a1209cdad..8c9f44a29 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit a1209cdad7321c8c2d1de8c43bf0f6b0aac7f1c8
+Subproject commit 8c9f44a29f8c9ad5da8348df3ee84edcc92dbc77