The types of 'astNode.loc' are incompatible between these types
I'm trying make simple server with the following code : 
` 
import { buildSchema } from 'graphql';

const graphqlRouter = new Router();
    graphqlRouter.all(
      /gql,
      graphqlHTTP({
        schema: buildSchema(
        `type Query {
          hello: String
        }`
      ),
        graphiql: false,
      }),
    );
`

but on line **schema** shows this:

Type 'import("node_modules/graphql/type/schema").GraphQLSchema' is not assignable to type 'import("node_modules/@types/koa-graphql/node_modules/graphql/type/schema").GraphQLSchema'.
  The types of 'astNode.loc' are incompatible between these types.
    Property 'toJSON' is missing in type 'import("node_modules/graphql/language/ast").Location' but required in type 'import("node_modules/@types/koa-graphql/node_modules/graphql/language/ast").Location'.ts(2322)

my setup includes 
- "type-graphql": "^1.0.0-rc.2",
- "koa-graphql": "^0.8.0" & @types/koa-graphql": "^0.8.4"