diff --git a/lib/helpers/call.js b/lib/helpers/call.js
index 969ad1a..4a73769 100644
--- a/lib/helpers/call.js
+++ b/lib/helpers/call.js
@@ -43,7 +43,7 @@ module.exports = function call(_config, _assert, _test, _responses) {
     if (data && typeof data === 'object') {
       data = require('querystring').stringify(data);
 
-      if (req.method === 'POST') {
+      if (req.method === 'POST' || req.method === 'PUT') {
         headers['content-type'] = headers['content-type'] || 'application/x-www-form-urlencoded';
       }
     }