diff --git a/vendor/grammars-v4 b/vendor/grammars-v4
index 284602b..e3f7c99 160000
--- a/vendor/grammars-v4
+++ b/vendor/grammars-v4
@@ -1 +1 @@
-Subproject commit 284602b3f23ca54dc30778204ab7ae9e969145e9
+Subproject commit e3f7c992259b5208b166a931100b735c246779a6