# Customize default mapping of elasticsearch **URL:** \ **Category:** Elasticsearch\ **Created:** [October 9, 2018, 11:11am UTC](https://discuss.elastic.co/t/customize-default-mapping-of-elasticsearch/151615 "2018-10-09T11:11:38Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![pranav24](https://avatars.discourse-cdn.com/v4/letter/p/b19c9b/32.png) [@pranav24](https://discuss.elastic.co/u/pranav24)\ **Post date:** [October 9, 2018, 11:11am UTC](https://discuss.elastic.co/t/customize-default-mapping-of-elasticsearch/151615/1 "2018-10-09T11:11:39Z")
Hi everyone, I want to change default mapping provided by elasticsearch for a index. When I am creating any index, I am providing mapping for known fields which I know will come inside that index. But there are some extra fields which can be indexed at run time, I want to set mapping for them whenever they are added. Elasticsearch version -6.3.2 ---
**Author:** ![abdon](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/abdon/32/9195_2.png) [@abdon](https://discuss.elastic.co/u/abdon)\ **Post date:** [October 10, 2018, 12:48pm UTC](https://discuss.elastic.co/t/customize-default-mapping-of-elasticsearch/151615/2 "2018-10-10T12:48:47Z")
Take a look at [dynamic templates](https://www.elastic.co/guide/en/elasticsearch/reference/current/dynamic-templates.html). Dynamic templates allow you to change the default mapping of unmapped fields, based on the name or JSON type of that field. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [November 7, 2018, 12:48pm UTC](https://discuss.elastic.co/t/customize-default-mapping-of-elasticsearch/151615/3 "2018-11-07T12:48:48Z")
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