diff --git a/hecl/extern/boo b/hecl/extern/boo
index b180b5535..e1964f57a 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit b180b5535bb3890a578aa5f88a4067471c9be7b5
+Subproject commit e1964f57a936db15b6cf455857cfe5d292092a34