diff --git a/README.md b/README.md
index a6f44afcd..a8757398e 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ The fastest JSON Schema validator for Node.js and browser. Supports draft-04/06/
 [![Build Status](https://travis-ci.org/ajv-validator/ajv.svg?branch=master)](https://travis-ci.org/ajv-validator/ajv)
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-[![Coverage Status](https://coveralls.io/repos/ajv-validator/ajv/badge.svg?branch=master&service=github)](https://coveralls.io/github/ajv-validator/ajv?branch=master)
+[![Coverage Status](https://coveralls.io/repos/github/ajv-validator/ajv/badge.svg?branch=master)](https://coveralls.io/github/ajv-validator/ajv?branch=master)
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