diff --git a/lib/request.js b/lib/request.js
index 3cde8fbb..7ecaabba 100644
--- a/lib/request.js
+++ b/lib/request.js
@@ -20,6 +20,7 @@ const request = (profile, data) => {
 		headers: {
 			'Content-Type': 'application/json',
 			'Accept-Encoding': 'gzip, deflate',
+			'Accept': 'application/json',
 			'user-agent': 'https://github.com/public-transport/hafas-client'
 		},
 		query: {}