diff --git a/vars/drafter.groovy b/vars/drafter.groovy
index 00d4b26..f110029 100644
--- a/vars/drafter.groovy
+++ b/vars/drafter.groovy
@@ -59,8 +59,12 @@
     echo "Adding data to draftset ${id}"
     String url = "${baseUrl}/v1/draftset/${id}/data"
     if (graph) {
-        String encGraph = java.net.URLEncoder.encode(graph, "UTF-8")
-        url = url + "?graph=${encGraph}"
+        if (type.contains('charset')) { // workaroud odd issue with endpoint not parsing params if charset
+            url = url + "?graph=${graph}"
+        } else {
+            String encGraph = java.net.URLEncoder.encode(graph, "UTF-8")
+            url = url + "?graph=${encGraph}"
+        }
     }
     def response = httpRequest(acceptType: 'APPLICATION_JSON',
             authentication: credentials,