I am using XPUT command in ElasticSearch and writing the correct command but getting same error again and again.

My code:

curl -XPUT 127.0.0.1:9200/movies -d '
{
        "mappings": {
                "properties": {
                        "year": {
                                "type": "date"
                        }
                }
        }
}'

And error is :

unexpected EOF while looking for matching `"'

I am following course on udemy and the instructor is writing the same command and getting the work done.