diff --git a/hecl/extern/boo b/hecl/extern/boo
index 42cedb77f..89e4a18d0 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 42cedb77f0b32719d1a2528c0953ee4dbb3110d8
+Subproject commit 89e4a18d0b6aae80e48d56bbf5eb0ddff0eba802