Merge pull request #1628 from stingalleman/patch-1

fix(security/helmet): fix import statement

Author: kamilmysliwiec

content/security/helmet.md

@@ -20,6 +20,8 @@ import * as helmet from 'helmet';
 app.use(helmet());
 ```
 
+> info **Hint** If you are getting the `This expression is not callable` error while trying to import `Helmet`, you very likely have the `allowSyntheticDefaultImports` and `esModuleInterop` options set to `true` in your project's `tsconfig.json` file. If that's the case, change the import statement to: `import helmet from 'helmet'` instead.
+
 #### Use with Fastify
 
 If you are using the `FastifyAdapter`, install the [fastify-helmet](https://github.com/fastify/fastify-helmet) package: