diff --git a/hecl/extern/boo b/hecl/extern/boo
index e62e8952b..6f8647dbb 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit e62e8952b5bf9ae1679fd3ddf942165973b944de
+Subproject commit 6f8647dbbf17f3e88064a751009163b3a9319b34