If your tool uses AST type checks something like: ```js import { LIST_TYPE, NON_NULL_TYPE, DOCUMENT, NAMED_TYPE } from 'graphql/language/kinds'; ... if (inputTypeAST.kind === LIST_TYPE) { ... ``` You need to change your code in following manner: ```diff - import { LIST_TYPE, NON_NULL_TYPE, DOCUMENT, NAMED_TYPE } from 'graphql/language/kinds'; + import { Kind } from 'graphql'; ... - if (inputTypeAST.kind === LIST_TYPE) { ... + if (inputTypeAST.kind === Kind.LIST_TYPE) { ... ``` According to last [improvements for v0.13.0](https://github.com/graphql/graphql-js/commit/17a0bfd5292f39cafe4eec5b3bd0e22514243b68#diff-fc9da17436b6ffdf301f6e41e53fc207) by @IvanGoncharov you not able to import desired AST types directly from `graphql/language/kinds`. And if you want that your tool must **support new and old versions of graphql lib**, please use code above.