diff --git a/hecl/extern/boo b/hecl/extern/boo
index 12bbf540f..ff89a9ccc 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 12bbf540fd25a30b832cdfa94a38acaa5839a969
+Subproject commit ff89a9cccf42ff3de93b97b11cde7f3f2f619622