diff --git a/script/list-grammars b/script/list-grammars
index f0bac8a7..22542745 100755
--- a/script/list-grammars
+++ b/script/list-grammars
@@ -98,4 +98,4 @@ class GrammarList
 end
 
 list = GrammarList.new
-puts list.update_readme()
+list.update_readme()