diff --git a/README.md b/README.md
index 71e9dec..889f20d 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # NestedFilter
-![Build](https://github.com/treble37/nested_filter/actions/workflows/nested_filter_ci.yml/badge.svg?branch=master)
+![Build](https://github.com/treble37/nested_filter/actions/workflows/nested_filter_ci.yml/badge.svg?branch=main)
 [![Maintainability](https://api.codeclimate.com/v1/badges/ba239c585908a0aad2ac/maintainability)](https://codeclimate.com/github/treble37/nested_filter/maintainability)
 [![Test Coverage](https://api.codeclimate.com/v1/badges/ba239c585908a0aad2ac/test_coverage)](https://codeclimate.com/github/treble37/nested_filter/test_coverage)
 [![Coverage Status](https://coveralls.io/repos/github/treble37/nested_filter/badge.svg?branch=master)](https://coveralls.io/github/treble37/nested_filter?branch=master)