diff --git a/hecl/extern/boo b/hecl/extern/boo
index aa7fce380..bb7728129 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit aa7fce38018bc4b2333b5487011209912b568dbd
+Subproject commit bb7728129e538d4124d74e45cb4ef73f798fda3e