Errors when using JSONLD v1.1

I'm getting errors when I'm trying to post jsonld, version 1.1. Is it a bug or v1.1 is just not supported?
Right now, I convert it to the turtle format before posting, but would be great if I can post jsonld without any extra steps.

import json
import requests
from requests.auth import HTTPBasicAuth

graph_endpoint = ...
headers = {'Content-Type': 'application/ld+json'}

json_v11 = '''
  "@context": {
    "@version": 1.1,
    "skos": "",
    "labels": "@nest",
    "main_label": {"@id": "skos:prefLabel"},
    "other_label": {"@id": "skos:altLabel"},
    "homepage": {"@id": "", "@type": "@id"}
  "@id": "",
  "homepage": "",
  "labels": {
     "main_label": "This is the main label for my resource",
     "other_label": "This is the other label"

response =, data=json_v11, headers=headers, auth=HTTPBasicAuth(STARDOG_USER, STARDOG_PASS))
print(response.status_code, response.content)
# 400 b'{"message":"Could not parse JSONLD: invalid term definition: 1.1","code":"QEIVR2"}'