diff --git a/hecl/extern/boo b/hecl/extern/boo
index 57cb96c1a..4a928dd2d 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 57cb96c1a7e6c6d589be2e9e2a697110b249c91a
+Subproject commit 4a928dd2d724f84143ca81d54a8c59b6accc4648