diff --git a/lib/js/thrift.js b/lib/js/thrift.js
index 0bd512b..cf89236 100644
--- a/lib/js/thrift.js
+++ b/lib/js/thrift.js
@@ -230,6 +230,7 @@
             data: postData,
             type: 'POST',
             cache: false,
+            contentType: 'application/json',
             dataType: 'text thrift',
             converters: {
                 'text thrift' : function(responseData) {