diff --git a/hecl/extern/boo b/hecl/extern/boo
index 8ee04c8f1..70b251875 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 8ee04c8f1a1afa03ca9184821cabb949710ae8fc
+Subproject commit 70b2518751a68635923dc576d8ee0b42d07a3d57