- Breaking: increase TypeScript strictness around arguments. Only affects TypeScript users. See helmetjs/helmet#369
- Breaking: Dropped support for old Node versions. Node 10+ is now required
- Allow multiple values to be set. See #7
- Added TypeScript type definitions. See helmetjs/helmet#188
- Created a changelog
- Updated documentation
Changes in versions 1.1.0 and below can be found in Helmet's changelog.