diff --git a/blns.json b/blns.json
index c0e7f45..959ef3a 100644
--- a/blns.json
+++ b/blns.json
@@ -1,6 +1,9 @@
 [
   "undefined", 
   "null", 
+  "NULL",
+  "nil",
+  "NIL",
   "1", 
   "1.00", 
   "$1.00",