diff --git a/CHANGELOG.md b/CHANGELOG.md
index 42526b5fa..4d17ed1c6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1572,7 +1572,7 @@ Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
 > 2 May 2022
 
-- add aave service agreement to ddo when creating nft721 asset  [`#248`](https://github.com/nevermined-io/sdk-js/pull/248)
+- add aave service agreement to ddo when creating nft721 asset [`#248`](https://github.com/nevermined-io/sdk-js/pull/248)
 - Adding v0.19.21 Changelog updates [`c93cdc5`](https://github.com/nevermined-io/sdk-js/commit/c93cdc55f139a43db4130ccb0f80924d2645a931)
 
 #### [v0.19.21](https://github.com/nevermined-io/sdk-js/compare/v0.19.20...v0.19.21)
@@ -1835,7 +1835,7 @@ Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
 > 18 January 2022
 
-- Removing not used  parameter [`#186`](https://github.com/nevermined-io/sdk-js/pull/186)
+- Removing not used parameter [`#186`](https://github.com/nevermined-io/sdk-js/pull/186)
 - [wip] Create agreement+pay in one transaction [`#183`](https://github.com/nevermined-io/sdk-js/pull/183)
 - Adapting to contracts `v1.3.3` [`#177`](https://github.com/nevermined-io/sdk-js/pull/177)
 - Adding v0.17.2 Changelog updates [`5eddda4`](https://github.com/nevermined-io/sdk-js/commit/5eddda43954e013e6e6f7344c9a877d801aacb5c)
@@ -2341,7 +2341,7 @@ Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 - Feature/sync develop [`#268`](https://github.com/nevermined-io/sdk-js/pull/268)
 - Quick fix for non-eip1559 networks [`#266`](https://github.com/nevermined-io/sdk-js/pull/266)
 - integrate Permissions and refactor search query [`#264`](https://github.com/nevermined-io/sdk-js/pull/264)
-- add aave service agreement to ddo when creating nft721 asset  [`#248`](https://github.com/nevermined-io/sdk-js/pull/248)
+- add aave service agreement to ddo when creating nft721 asset [`#248`](https://github.com/nevermined-io/sdk-js/pull/248)
 - Get the keeper version from the artifacts instead of package version [`#244`](https://github.com/nevermined-io/sdk-js/pull/244)
 - replace `metadata-api` url by `marketplace-api` and sort type [`#243`](https://github.com/nevermined-io/sdk-js/pull/243)
 - fixing issues with BigNumbers [`#246`](https://github.com/nevermined-io/sdk-js/pull/246)
@@ -2380,7 +2380,7 @@ Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 - Feature/190 add did to sec markets [`#191`](https://github.com/nevermined-io/sdk-js/pull/191)
 - Adding utility methods for getting nft token uri [`#189`](https://github.com/nevermined-io/sdk-js/pull/189)
 - Lint ... [`#187`](https://github.com/nevermined-io/sdk-js/pull/187)
-- Removing not used  parameter [`#186`](https://github.com/nevermined-io/sdk-js/pull/186)
+- Removing not used parameter [`#186`](https://github.com/nevermined-io/sdk-js/pull/186)
 - [wip] Create agreement+pay in one transaction [`#183`](https://github.com/nevermined-io/sdk-js/pull/183)
 - Adapting to contracts `v1.3.3` [`#177`](https://github.com/nevermined-io/sdk-js/pull/177)
 - Correct typo in route [`#184`](https://github.com/nevermined-io/sdk-js/pull/184)
diff --git a/src/ddo/types.ts b/src/ddo/types.ts
index dacddab5b..3f6dafd33 100644
--- a/src/ddo/types.ts
+++ b/src/ddo/types.ts
@@ -268,6 +268,7 @@ export interface MetaDataMain {
     | 'model'
     | 'file'
     | 'other'
+    | 'assistant'
 
   /**
    * Sub type asssociated to the main type of the asset. This subtype is open so final users are not restricted to use anything they need.
@@ -513,7 +514,7 @@ export interface PublicKey {
 
 /**
  * Nevermined Config DDO section
- * 
+ *
  * @example
  * ```ts
  * "_nvm": {