# Charter 18 error: Publisher is only available in iOS 13.0 **URL:** \ **Category:** Combine: Asynchronous Programming with Swift\ **Created:** [June 30, 2022, 6:23pm UTC](https://forums.kodeco.com/t/charter-18-error-publisher-is-only-available-in-ios-13-0/174165 "2022-06-30T18:23:38Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![felipefl](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/felipefl/32/102075_2.png) [@felipefl](https://forums.kodeco.com/u/felipefl)\ **Post date:** [June 30, 2022, 6:23pm UTC](https://forums.kodeco.com/t/charter-18-error-publisher-is-only-available-in-ios-13-0/174165/1 "2022-06-30T18:23:38Z")
**‘Publisher’ is only available in iOS 13.0 or newer** **extension Publisher {** help me please ---
**Author:** ![icanzilb](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/icanzilb/32/109333_2.png) [@icanzilb](https://forums.kodeco.com/u/icanzilb)\ **Post date:** [July 1, 2022, 7:15pm UTC](https://forums.kodeco.com/t/charter-18-error-publisher-is-only-available-in-ios-13-0/174165/2 "2022-07-01T19:15:18Z")
Hi Felipe, the `Publisher` protocol is available on iOS 13 or later. You can check the availability of this type in apple’s documentation: [Apple Developer Documentation](https://developer.apple.com/documentation/combine/publisher) ---
**Author:** ![ms70285](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/ms70285/32/102075_2.png) [@ms70285](https://forums.kodeco.com/u/ms70285)\ **Post date:** [July 7, 2022, 5:19pm UTC](https://forums.kodeco.com/t/charter-18-error-publisher-is-only-available-in-ios-13-0/174165/3 "2022-07-07T17:19:36Z")
You’ll need to update your deployment target to be iOS 13. You can do this by selecting the project file in Xcode, select “Build Settings”, and then do a search on “iOS”. You can update your deployment target from there.