diff --git a/hecl/extern/boo b/hecl/extern/boo
index 2a49a8d44..55d1a5bc9 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 2a49a8d4475bd97125bffacbe77b73e3724a45be
+Subproject commit 55d1a5bc931956ba467a3e3eb3ceaaf896929c1a