diff --git a/README.md b/README.md
index 552a848..c73d190 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ Ommiting a callback function returns a promise:
 const verifier = require('alexa-verifier')
 
 
-const verifyPromise = verifier(cert_url, signature, requestRawBody, callback)
+const verifyPromise = verifier(cert_url, signature, requestRawBody)
 ```