diff --git a/hecl/extern/boo b/hecl/extern/boo
index 65f830206..ee9f3efe6 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 65f8302060b8e3992d0924bd065020df590ca12f
+Subproject commit ee9f3efe610814707f50c034fb419b91987064bf