diff --git a/README.md b/README.md
index 43495bc..b9b6f77 100755
--- a/README.md
+++ b/README.md
@@ -23,4 +23,5 @@ Some Changes Of Readme
 - 17 Make It Green
 - 18 Make It Green
 - 19 Make It Green
-- 20 Make It Gree
+- 20 Make It Green
+- 21 Make It Green