diff --git a/hecl/extern/boo b/hecl/extern/boo
index 8241df0a1..4a55a04e1 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 8241df0a1be09dbee177f467104b2a7c53506ce7
+Subproject commit 4a55a04e18273324ef9487d1deb7174692b9d5bb