Add accept: application/json header if json option is set

index.js

@@ -55,6 +55,10 @@ function got(url, opts, cb) {
 	delete opts.timeout;
 	delete opts.query;
 
+	if (json) {
+		opts.headers.accept = opts.headers.accept || 'application/json';
+	}
+
 	if (body) {
 		opts.method = opts.method || 'POST';
 	}

readme.md

@@ -76,7 +76,7 @@ Default: `false`
 
 _This option and stream mode are mutually exclusive._
 
-If enabled, response body will be parsed with `JSON.parse`.
+If enabled, response body will be parsed with `JSON.parse` and `accept` header will be set to `application/json` by default.
 
 ###### query
 

test/test-headers.js

@@ -32,6 +32,13 @@ tape('send accept-encoding header by default', function (t) {
 	});
 });
 
+tape('send accept header with json option', function (t) {
+	got(s.url, {json: true}, function (err, headers) {
+		t.equal(headers.accept, 'application/json');
+		t.end();
+	});
+});
+
 tape('send host header by default', function (t) {
 	got(s.url, function (err, data) {
 		var headers = JSON.parse(data);