diff --git a/vendor/grammars-v4 b/vendor/grammars-v4
index 284602b..99edd04 160000
--- a/vendor/grammars-v4
+++ b/vendor/grammars-v4
@@ -1 +1 @@
-Subproject commit 284602b3f23ca54dc30778204ab7ae9e969145e9
+Subproject commit 99edd048f64db545b20da57a3dda0ab279b0fd6e