diff --git a/README.md b/README.md
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+++ b/README.md
@@ -1,4 +1,4 @@
-# GoMathExecutor [![GoDoc](https://godoc.org/github.com/neonxp/GoMathExecutor?status.svg)](https://godoc.org/github.com/neonxp/GoMathExecutor) [![Build Status](https://travis-ci.org/neonxp/GoMathExecutor.svg?branch=master)](https://travis-ci.org/neonxp/GoMathExecutor)
+# GoMathExecutor [![GoDoc](https://godoc.org/github.com/neonxp/GoMathExecutor?status.svg)](https://godoc.org/github.com/neonxp/GoMathExecutor) [![Build Status](https://travis-ci.org/neonxp/GoMathExecutor.svg?branch=master)](https://travis-ci.org/neonxp/GoMathExecutor) [![codecov](https://codecov.io/gh/neonxp/GoMathExecutor/branch/master/graph/badge.svg)](https://codecov.io/gh/neonxp/GoMathExecutor)
 
 Package GoMathExecutor provides simple expression executor.