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# Changelog
## 7.0.0 - 2023-05-06
### Changed
- **Breaking:** `Cross-Origin-Embedder-Policy` middleware is now disabled by default. See [#411](https://github.com/helmetjs/helmet/issues/411)
### Removed
- **Breaking:** Drop support for Node 14 and 15. Node 16+ is now required
- **Breaking:** `Expect-CT` is no longer part of Helmet. If you still need it, you can use the [`expect-ct` package](https://www.npmjs.com/package/expect-ct). See [#378](https://github.com/helmetjs/helmet/issues/378)
### 6.2.0 - 2023-05-06
- Expose header names (e.g., `strictTransportSecurity` for the `Strict-Transport-Security` header, instead of `hsts`)
- Rework documentation
## 6.1.5 - 2023-04-11
### Fixed
- Fixed yet another issue with TypeScript exports. See [#420](https://github.com/helmetjs/helmet/pull/418)
## 6.1.4 - 2023-04-10
### Fixed
- Fix another issue with TypeScript default exports. See [#418](https://github.com/helmetjs/helmet/pull/418)
## 6.1.3 - 2023-04-10
### Fixed
- Fix issue with TypeScript default exports. See [#417](https://github.com/helmetjs/helmet/pull/417)
## 6.1.2 - 2023-04-09
### Fixed
- Retored `main` to package to help with some build tools
## 6.1.1 - 2023-04-08
### Fixed
- Fixed missing package metadata
## 6.1.0 - 2023-04-08
### Changed
- Improve support for various TypeScript setups, including "nodenext". See [#405](https://github.com/helmetjs/helmet/pull/405)
## 6.0.1 - 2022-11-29
### Fixed
- `crossOriginEmbedderPolicy` did not accept options at the top level. See [#390](https://github.com/helmetjs/helmet/issues/390)
## 6.0.0 - 2022-08-26
### Changed
- **Breaking:** `helmet.contentSecurityPolicy` no longer sets `block-all-mixed-content` directive by default
- **Breaking:** `helmet.expectCt` is no longer set by default. It can, however, be explicitly enabled. It will be removed in Helmet 7. See [#310](https://github.com/helmetjs/helmet/issues/310)
- **Breaking:** Increase TypeScript strictness around some arguments. Only affects TypeScript users, and may not require any code changes. See [#369](https://github.com/helmetjs/helmet/issues/369)
- `helmet.frameguard` no longer offers a specific error when trying to use `ALLOW-FROM`; it just says that it is unsupported. Only the error message has changed
### Removed
- **Breaking:** Dropped support for Node 12 and 13. Node 14+ is now required
## 5.1.1 - 2022-07-23
### Changed
- Fix TypeScript bug with some TypeScript configurations. See [#375](https://github.com/helmetjs/helmet/pull/375) and [#359](https://github.com/helmetjs/helmet/issues/359)
## 5.1.0 - 2022-05-17
### Added
- `Cross-Origin-Embedder-Policy`: support `credentialless` policy. See [#365](https://github.com/helmetjs/helmet/pull/365)
- Documented how to set both `Content-Security-Policy` and `Content-Security-Policy-Report-Only`
### Changed
- Cleaned up some documentation around `Origin-Agent-Cluster`
## 5.0.2 - 2022-01-22
### Changed
- Improve imports for CommonJS and ECMAScript modules. See [#345](https://github.com/helmetjs/helmet/pull/345)
- Fixed some documentation
## 5.0.1 - 2022-01-03
### Changed
- Fixed some documentation
### Removed
- Removed some unused internal code
## 5.0.0 - 2022-01-02
### Added
- ECMAScript module imports (i.e., `import helmet from "helmet"` and `import { frameguard } from "helmet"`). See [#320](https://github.com/helmetjs/helmet/issues/320)
### Changed
- **Breaking:** `helmet.contentSecurityPolicy`: `useDefaults` option now defaults to `true`
- **Breaking:** `helmet.contentSecurityPolicy`: `form-action` directive is now set to `'self'` by default
- **Breaking:** `helmet.crossOriginEmbedderPolicy` is enabled by default
- **Breaking:** `helmet.crossOriginOpenerPolicy` is enabled by default
- **Breaking:** `helmet.crossOriginResourcePolicy` is enabled by default
- **Breaking:** `helmet.originAgentCluster` is enabled by default
- `helmet.frameguard`: add TypeScript editor autocomplete. See [#322](https://github.com/helmetjs/helmet/pull/322)
- Top-level `helmet()` function is slightly faster
### Removed
- **Breaking:** Drop support for Node 10 and 11. Node 12+ is now required
## 4.6.0 - 2021-05-01
### Added
- `helmet.contentSecurityPolicy`: the `useDefaults` option, defaulting to `false`, lets you selectively override defaults more easily
- Explicitly define TypeScript types in `package.json`. See [#303](https://github.com/helmetjs/helmet/pull/303)
## 4.5.0 - 2021-04-17
### Added
- `helmet.crossOriginEmbedderPolicy`: a new middleware for the `Cross-Origin-Embedder-Policy` header, disabled by default
- `helmet.crossOriginOpenerPolicy`: a new middleware for the `Cross-Origin-Opener-Policy` header, disabled by default
- `helmet.crossOriginResourcePolicy`: a new middleware for the `Cross-Origin-Resource-Policy` header, disabled by default
### Changed
- `true` enables a middleware with default options. Previously, this would fail with an error if the middleware was already enabled by default.
- Log a warning when passing options to `originAgentCluster` at the top level
### Fixed
- Incorrect documentation
## 4.4.1 - 2021-01-18
### Changed
- Shrink the published package by about 2.5 kB
## 4.4.0 - 2021-01-17
### Added
- `helmet.originAgentCluster`: a new middleware for the `Origin-Agent-Cluster` header, disabled by default
## 4.3.1 - 2020-12-27
### Fixed
- `helmet.contentSecurityPolicy`: broken TypeScript types. See [#283](https://github.com/helmetjs/helmet/issues/283)
## 4.3.0 - 2020-12-27
### Added
- `helmet.contentSecurityPolicy`: setting the `default-src` to `helmet.contentSecurityPolicy.dangerouslyDisableDefaultSrc` disables it
### Changed
- `helmet.frameguard`: slightly improved error messages for non-strings
## 4.2.0 - 2020-11-01
### Added
- `helmet.contentSecurityPolicy`: get the default directives with `contentSecurityPolicy.getDefaultDirectives()`
### Changed
- `helmet()` now supports objects that don't have `Object.prototype` in their chain, such as `Object.create(null)`, as options
- `helmet.expectCt`: `max-age` is now first. See [#264](https://github.com/helmetjs/helmet/pull/264)
## 4.1.1 - 2020-09-10
### Changed
- Fixed a few errors in the README
## 4.1.0 - 2020-08-15
### Added
- `helmet.contentSecurityPolicy`:
- Directive values can now include functions, as they could in Helmet 3. See [#243](https://github.com/helmetjs/helmet/issues/243)
### Changed
- Helmet should now play more nicely with TypeScript
### Removed
- The `HelmetOptions` interface is no longer exported. This only affects TypeScript users. If you need the functionality back, see [this comment](https://github.com/helmetjs/helmet/issues/235#issuecomment-674016883)
## 4.0.0 - 2020-08-02
See the [Helmet 4 upgrade guide](https://github.com/helmetjs/helmet/wiki/Helmet-4-upgrade-guide) for help upgrading from Helmet 3.
### Added
- `helmet.contentSecurityPolicy`:
- If no `default-src` directive is supplied, an error is thrown
- Directive lists can be any iterable, not just arrays
### Changed
- This package no longer has dependencies. This should have no effect on end users, other than speeding up installation time.
- `helmet.contentSecurityPolicy`:
- There is now a default set of directives if none are supplied
- Duplicate keys now throw an error. See [helmetjs/csp#73](https://github.com/helmetjs/csp/issues/73)
- This middleware is more lenient, allowing more directive names or values
- `helmet.xssFilter` now disables the buggy XSS filter by default. See [#230](https://github.com/helmetjs/helmet/issues/230)
### Removed
- Dropped support for old Node versions. Node 10+ is now required
- `helmet.featurePolicy`. If you still need it, use the `feature-policy` package on npm.
- `helmet.hpkp`. If you still need it, use the `hpkp` package on npm.
- `helmet.noCache`. If you still need it, use the `nocache` package on npm.
- `helmet.contentSecurityPolicy`:
- Removed browser sniffing (including the `browserSniff` and `disableAndroid` parameters). See [helmetjs/csp#97](https://github.com/helmetjs/csp/issues/97)
- Removed conditional support. This includes directive functions and support for a function as the `reportOnly`. [Read this if you need help.](https://github.com/helmetjs/helmet/wiki/Conditionally-using-middleware)
- Removed a lot of checks—you should be checking your CSP with a different tool
- Removed support for legacy headers (and therefore the `setAllHeaders` parameter). [Read this if you need help.](https://github.com/helmetjs/helmet/wiki/Setting-legacy-Content-Security-Policy-headers-in-Helmet-4)
- Removed the `loose` option
- Removed support for functions as directive values. You must supply an iterable of strings
- `helmet.frameguard`:
- Dropped support for the `ALLOW-FROM` action. [Read more here.](https://github.com/helmetjs/helmet/wiki/How-to-use-X%E2%80%93Frame%E2%80%93Options's-%60ALLOW%E2%80%93FROM%60-directive)
- `helmet.hidePoweredBy` no longer accepts arguments. See [this article](https://github.com/helmetjs/helmet/wiki/How-to-set-a-custom-X%E2%80%93Powered%E2%80%93By-header) to see how to replicate the removed behavior. See [#224](https://github.com/helmetjs/helmet/issues/224).
- `helmet.hsts`:
- Dropped support for `includeSubdomains` with a lowercase D. See [#231](https://github.com/helmetjs/helmet/issues/231)
- Dropped support for `setIf`. [Read this if you need help.](https://github.com/helmetjs/helmet/wiki/Conditionally-using-middleware) See [#232](https://github.com/helmetjs/helmet/issues/232)
- `helmet.xssFilter` no longer accepts options. Read ["How to disable blocking with X-XSS-Protection"](https://github.com/helmetjs/helmet/wiki/How-to-disable-blocking-with-X%E2%80%93XSS%E2%80%93Protection) and ["How to enable the `report` directive with X-XSS-Protection"](https://github.com/helmetjs/helmet/wiki/How-to-enable-the-%60report%60-directive-with-X%E2%80%93XSS%E2%80%93Protection) if you need the legacy behavior.
## 3.23.3 - 2020-06-26
### Changed
- `helmet.expectCt` is no longer a separate package. This should have no effect on end users.
- `helmet.frameguard` is no longer a separate package. This should have no effect on end users.
## 3.23.2 - 2020-06-23
### Changed
- `helmet.dnsPrefetchControl` is no longer a separate package. This should have no effect on end users.
## 3.23.1 - 2020-06-16
### Changed
- `helmet.ieNoOpen` is no longer a separate package. This should have no effect on end users.
## 3.23.0 - 2020-06-12
### Deprecated
- `helmet.featurePolicy` is deprecated. Use the `feature-policy` module instead.
## 3.22.1 - 2020-06-10
### Changed
- Rewrote internals in TypeScript. This should have no effect on end users.
## 3.22.0 - 2020-03-24
### Changed
- Updated `helmet-csp` to v2.10.0
- Add support for the `allow-downloads` sandbox directive. See [helmet-csp#103](https://github.com/helmetjs/csp/pull/103)
### Deprecated
- `helmet.noCache` is deprecated. Use the `nocache` module instead. See [#215](https://github.com/helmetjs/helmet/issues/215)
## 3.21.3 - 2020-02-24
### Changed
- Updated `helmet-csp` to v2.9.5
- Updated `bowser` subdependency from 2.7.0 to 2.9.0
- Fixed an issue some people were having when importing the `bowser` subdependency. See [helmet-csp#96](https://github.com/helmetjs/csp/issues/96) and [#101](https://github.com/helmetjs/csp/pull/101)
## 3.21.2 - 2019-10-21
### Changed
- Updated `helmet-csp` to v2.9.4
- Updated `bowser` subdependency from 2.6.1 to 2.7.0. See [helmet-csp#94](https://github.com/helmetjs/csp/pull/94)
## 3.21.1 - 2019-09-20
### Fixed
- Updated `helmet-csp` to v2.9.2
- Fixed a bug where a request from Firefox 4 could delete `default-src` from future responses
- Fixed tablet PC detection by updating `bowser` subdependency to latest version
## 3.21.0 - 2019-09-04
### Added
- Updated `x-xss-protection` to v1.3.0
- Added `mode: null` to disable `mode=block`
### Changed
- Updated `helmet-csp` to v2.9.1
- Updated `bowser` subdependency from 2.5.3 to 2.5.4. See [helmet-csp#88](https://github.com/helmetjs/csp/pull/88)
## 3.20.1 - 2019-08-28
### Changed
- Updated `helmet-csp` to v2.9.0
## 3.20.0 - 2019-07-24
### Changed
- Updated `helmet-csp` to v2.8.0
## 3.19.0 - 2019-07-17
### Changed
- Updated `dns-prefetch-control` to v0.2.0
- Updated `dont-sniff-mimetype` to v1.1.0
- Updated `helmet-crossdomain` to v0.4.0
- Updated `hide-powered-by` to v1.1.0
- Updated `x-xss-protection` to v1.2.0
## 3.18.0 - 2019-05-05
### Added
- `featurePolicy` has 19 new features: `ambientLightSensor`, `documentDomain`, `documentWrite`, `encryptedMedia`, `fontDisplayLateSwap`, `layoutAnimations`, `legacyImageFormats`, `loadingFrameDefaultEager`, `oversizedImages`, `pictureInPicture`, `serial`, `syncScript`, `unoptimizedImages`, `unoptimizedLosslessImages`, `unoptimizedLossyImages`, `unsizedMedia`, `verticalScroll`, `wakeLock`, and `xr`
### Changed
- Updated `expect-ct` to v0.2.0
- Updated `feature-policy` to v0.3.0
- Updated `frameguard` to v3.1.0
- Updated `nocache` to v2.1.0
## 3.17.0 - 2019-05-03
### Added
- `referrerPolicy` now supports multiple values
### Changed
- Updated `referrerPolicy` to v1.2.0
## 3.16.0 - 2019-03-10
### Added
- Add email to `bugs` field in `package.json`
### Changed
- Updated `hsts` to v2.2.0
- Updated `ienoopen` to v1.1.0
- Changelog is now in the [Keep A Changelog](https://keepachangelog.com/) format
- Dropped support for Node <4. See [the commit](https://github.com/helmetjs/helmet/commit/a49cec3ca58cce484d2d05e1f908549caa92ed03) for more information
- Updated Adam Baldwin's contact information
### Deprecated
- `helmet.hsts`'s `setIf` option has been deprecated and will be removed in `hsts@3`. See [helmetjs/hsts#22](https://github.com/helmetjs/hsts/issues/22) for more
* The `includeSubdomains` option (with a lowercase `d`) has been deprecated and will be removed in `hsts@3`. Use the uppercase-D `includeSubDomains` option instead. See [helmetjs/hsts#21](https://github.com/helmetjs/hsts/issues/21) for more
## 3.15.1 - 2019-02-10
### Deprecated
- The `hpkp` middleware has been deprecated. If you still need to use this module, install the standalone `hpkp` module from npm. See [#180](https://github.com/helmetjs/helmet/issues/180) for more.
## 3.15.0 - 2018-11-07
### Added
- `helmet.featurePolicy` now supports four new features
## 3.14.0 - 2018-10-09
### Added
- `helmet.featurePolicy` middleware
## 3.13.0 - 2018-07-22
### Added
- `helmet.permittedCrossDomainPolicies` middleware
## 3.12.2 - 2018-07-20
### Fixed
- Removed `lodash.reduce` dependency from `csp`
## 3.12.1 - 2018-05-16
### Fixed
- `expectCt` should use comma instead of semicolon as delimiter
## 3.12.0 - 2018-03-02
### Added
- `xssFilter` now supports `reportUri` option
## 3.11.0 - 2018-02-09
### Added
- Main Helmet middleware is now named to help with debugging
## 3.10.0 - 2018-01-23
### Added
- `csp` now supports `prefix-src` directive
### Fixed
- `csp` no longer loads JSON files internally, helping some module bundlers
- `false` should be able to disable a CSP directive
## 3.9.0 - 2017-10-13
### Added
- `csp` now supports `strict-dynamic` value
- `csp` now supports `require-sri-for` directive
### Changed
- Removed `connect` dependency
## 3.8.2 - 2017-09-27
### Changed
- Updated `connect` dependency to latest
## 3.8.1 - 2017-07-28
### Fixed
- `csp` does not automatically set `report-to` when setting `report-uri`
## 3.8.0 - 2017-07-21
### Changed
- `hsts` no longer cares whether it's HTTPS and always sets the header
## 3.7.0 - 2017-07-21
### Added
- `csp` now supports `report-to` directive
### Changed
- Throw an error when used incorrectly
- Add a few documentation files to `npmignore`
## 3.6.1 - 2017-05-21
### Changed
- Bump `connect` version
## 3.6.0 - 2017-05-04
### Added
- `expectCt` middleware for setting the `Expect-CT` header
## 3.5.0 - 2017-03-06
### Added
- `csp` now supports the `worker-src` directive
## 3.4.1 - 2017-02-24
### Changed
- Bump `connect` version
## 3.4.0 - 2017-01-13
### Added
- `csp` now supports more `sandbox` directives
## 3.3.0 - 2016-12-31
### Added
- `referrerPolicy` allows `strict-origin` and `strict-origin-when-cross-origin` directives
### Changed
- Bump `connect` version
## 3.2.0 - 2016-12-22
### Added
- `csp` now allows `manifest-src` directive
## 3.1.0 - 2016-11-03
### Added
- `csp` now allows `frame-src` directive
## 3.0.0 - 2016-10-28
### Changed
- `csp` will check your directives for common mistakes and throw errors if it finds them. This can be disabled with `loose: true`.
- Empty arrays are no longer allowed in `csp`. For source lists (like `script-src` or `object-src`), use the standard `scriptSrc: ["'none'"]`. The `sandbox` directive can be `sandbox: true` to block everything.
- `false` can disable a CSP directive. For example, `scriptSrc: false` is the same as not specifying it.
- In CSP, `reportOnly: true` no longer requires a `report-uri` to be set.
- `hsts`'s `maxAge` now defaults to 180 days (instead of 1 day)
- `hsts`'s `maxAge` parameter is seconds, not milliseconds
- `hsts` includes subdomains by default
- `domain` parameter in `frameguard` cannot be empty
### Removed
- `noEtag` option no longer present in `noCache`
- iOS Chrome `connect-src` workaround in CSP module
## 2.3.0 - 2016-09-30
### Added
- `hpkp` middleware now supports the `includeSubDomains` property with a capital D
### Fixed
- `hpkp` was setting `includeSubdomains` instead of `includeSubDomains`
## 2.2.0 - 2016-09-16
### Added
- `referrerPolicy` middleware
## 2.1.3 - 2016-09-07
### Changed
- Top-level aliases (like `helmet.xssFilter`) are no longer dynamically required
## 2.1.2 - 2016-07-27
### Deprecated
- `nocache`'s `noEtag` option is now deprecated
### Fixed
- `csp` now better handles Firefox on mobile
## 2.1.1 - 2016-06-10
### Changed
- Remove several dependencies from `helmet-csp`
### Fixed
- `frameguard` had a documentation error about its default value
- `frameguard` docs in main Helmet readme said `frameguard`, not `helmet.frameguard`
## 2.1.0 - 2016-05-18
### Added
- `csp` lets you dynamically set `reportOnly`
## 2.0.0 - 2016-04-29
### Added
- Pass configuration to enable/disable default middlewares
### Changed
- `dnsPrefetchControl` middleware is now enabled by default
### Removed
- No more module aliases. There is now just one way to include each middleware
- `frameguard` can no longer be initialized with strings; you must use an object
### Fixed
- Make `hpkp` lowercase in documentation
- Update `hpkp` spec URL in readmes
- Update `frameguard` header name in readme
## 1.3.0 - 2016-03-01
### Added
- `hpkp` has a `setIf` option to conditionally set the header
## 1.2.0 - 2016-02-29
### Added
- `csp` now has a `browserSniff` option to disable all user-agent sniffing
### Changed
- `frameguard` can now be initialized with options
- Add `npmignore` file to speed up installs slightly
## 1.1.0 - 2016-01-12
### Added
- Code of conduct
- `dnsPrefetchControl` middleware
### Fixed
- `csp` readme had syntax errors
## 1.0.2 - 2016-01-08
### Fixed
- `csp` wouldn't recognize `IE Mobile` browsers
- `csp` had some errors in its readme
- Main readme had a syntax error
## 1.0.1 - 2015-12-19
### Fixed
- `csp` with no User Agent would cause errors
## 1.0.0 - 2015-12-18
### Added
- `csp` module supports dynamically-generated values
### Changed
- `csp` directives are now under the `directives` key
- `hpkp`'s `Report-Only` header is now opt-in, not opt-out
- Tweak readmes of every sub-repo
### Removed
- `crossdomain` middleware
- `csp` no longer throws errors when some directives aren't quoted (`'self'`, for example)
- `maxage` option in the `hpkp` middleware
- `safari5` option from `csp` module
### Fixed
- Old Firefox Content-Security-Policy behavior for `unsafe-inline` and `unsafe-eval`
- Dynamic `csp` policies is no longer recursive
## 0.15.0 - 2015-11-26
### Changed
- `hpkp` allows a `report-uri` without the `Report-Only` header
## 0.14.0 - 2015-11-01
### Added
- `nocache` now sends the `Surrogate-Control` header
### Changed
- `nocache` no longer contains the `private` directive in the `Cache-Control` header
## 0.13.0 - 2015-10-23
### Added
- `xssFilter` now has a function name
- Added new CSP docs to readme
### Changed
- HSTS option renamed from `includeSubdomains` to `includeSubDomains`
## 0.11.0 - 2015-09-18
### Added
- `csp` now supports Microsoft Edge
- CSP Level 2 support
### Changed
- Updated `connect` to 3.4.0
- Updated `depd` to 1.1.0
### Fixed
- Added `license` key to `csp`'s `package.json`
- Empty `csp` directives now support every directive, not just `sandbox`
## 0.10.0 - 2015-07-08
### Added
- Add "Handling CSP violations" to `csp` readme
- Add license to `package.json`
### Changed
- `hpkp` had a link to the wrong place in its readme
- `hpkp` requires 2 or more pins
### Fixed
- `hpkp` might have miscalculated `maxAge` slightly wrong
## 0.9.0 - 2015-04-24
### Changed
- `nocache` adds `private` to its `Cache-Control` directive
- Added a description to `package.json`
## 0.8.0 - 2015-04-21
### Changed
- Removed hefty Lodash dependency from HSTS and CSP
- Updated string detection module in Frameguard
- Changed readme slightly to better reflect project's focus
### Deprecated
- Deprecated `crossdomain` middleware
### Removed
- `crossdomain` is no longer a default middleware
## 0.7.1 - 2015-03-23
### Changed
- Updated all outdated dependencies (insofar as possible)
- HSTS now uses Lodash like all the rest of the libraries
## 0.7.0 - 2015-03-05
### Added
- `hpkp` middleware
### Changed
- Travis CI should test 0.10 and 0.12
- Minor code cleanup
## 0.6.2 - 2015-03-01
### Changed
- Improved `xssFilter` performance
- Updated Lodash versions
## 0.6.1 - 2015-02-13
### Added
- "Other recommended modules" in README
### Changed
- Updated Lodash version
### Fixed
- `frameguard` middleware exported a function called `xframe`
## 0.6.0 - 2015-01-21
### Added
- You can disable `csp` for Android
### Fixed
- `csp` on Chrome Mobile on Android and iOS
## 0.5.4 - 2014-12-21
### Changed
- `nocache` should force revalidation
## 0.5.3 - 2014-12-08
### Changed
- `platform` version in CSP and X-XSS-Protection
### Fixed
- Updated bad wording in frameguard docs
## 0.5.2 - 2014-11-16
### Changed
- Updated Connect version
### Fixed
- Fixed minor `csp` bugfixes
## 0.5.1 - 2014-11-09
### Changed
- Updated URLs in `package.json` for new URL
### Fixed
- CSP would set all headers forever after receiving an unknown user agent
## 0.5.0 - 2014-10-28
### Added
- Most middlewares have some aliases now
### Changed
- `xframe` now called `frameguard` (though `xframe` still works)
- `frameguard` chooses sameorigin by default
- `frameguard` understands "SAME-ORIGIN" in addition to "SAMEORIGIN"
- `nocache` removed from default middleware stack
- Middleware split out into their own modules
- Documentation
- Updated supported Node version to at least 0.10.0
- Bumped Connect version
### Removed
- Deprecation warnings
### Fixed
- Readme link was broken
## 0.4.2 - 2014-10-16
### Added
- Support preload in HSTS header
## 0.4.1 - 2014-08-24
### Added
- Use [helmet-crossdomain](https://github.com/helmetjs/crossdomain) to test the waters
- 2 spaces instead of 4 throughout the code
## 0.4.0 - 2014-07-17
### Added
- `nocache` now sets the Expires and Pragma headers
- `nocache` now allows you to crush ETags
### Changed
- Improved the docs for nosniff
- Reverted HSTS behavior of requiring a specified max-age
### Fixed
- Allow HSTS to have a max-age of 0
## 0.3.2 - 2014-06-30
### Added
- All middleware functions are named
- Throw error with non-positive HSTS max-age
### Changed
- Added semicolons in README
- Make some Errors more specific
### Removed
- Removed all comment headers; refer to the readme
### Fixed
- `helmet()` was having issues
- Fixed Syntax errors in README
This changelog was created after the release of 0.3.1.