diff --git a/hecl/extern/boo b/hecl/extern/boo
index 581971ba0..b180b5535 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 581971ba099c009c83a45a30702e705251cdd220
+Subproject commit b180b5535bb3890a578aa5f88a4067471c9be7b5