diff --git a/hecl/extern/boo b/hecl/extern/boo
index 528c57267..9b0355be4 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 528c572671463cba7f1f7f03efbbcc76b70429e2
+Subproject commit 9b0355be45b341e2cd77945eaa24c783e0b96c8b