diff --git a/README.md b/README.md
index b433390..5648a10 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,2 @@
-[![Build Status](https://travis-ci.com/taotsui/cs107test.svg?branch=main)](https://travis-ci.com/taotsui/cs107test)
-[![codecov](https://codecov.io/gh/taotsui/cs107test/branch/master/graph/badge.svg?token=G3MTUFG35J)](undefined)
\ No newline at end of file
+[![Build Status](https://travis-ci.com/taotsui/cs107test.svg?branch=master)](https://travis-ci.com/taotsui/cs107test)
+[![codecov](https://codecov.io/gh/taotsui/cs107test/branch/master/graph/badge.svg?token=G3MTUFG35J)](undefined)