diff --git a/README.md b/README.md
index 6022956..1f17d10 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@ $ node ./simple.js
 var mappingTemplate = require('api-gateway-mapping-template')
 ```
 
-### mappingTemplate(template, payload, params, context)
+### mappingTemplate(parameters)
 
 This function renders AWS API Gateway's Mapping Template by using given payload, params and context.