diff --git a/hecl/extern/boo b/hecl/extern/boo
index 35732d33f..8523fcbb7 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 35732d33f5caf50f6fc3c8455f6e4fb2802d6239
+Subproject commit 8523fcbb78b116ec50952dfdd66931af64837734