diff --git a/hecl/extern/boo b/hecl/extern/boo
index b3e77c438..4a74a0ad7 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit b3e77c4384ec5a097ed782fd72aca2639a188a2d
+Subproject commit 4a74a0ad7c03bb701c2be018dcc43555412251b0