diff --git a/hecl/extern/boo b/hecl/extern/boo
index db8964017..4cffc6e4e 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit db89640172418a67f54c799124e308a7fcfd9578
+Subproject commit 4cffc6e4ec64642a2ca144ada7a4cbdae58a5f3f