diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0c8ff1d2..5e3ceadc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,26 @@ Add new items at the end of the relevant section under **Unreleased**.
 
 ## [Unreleased]
 
+*No new changes.*
+
+---
+
+## [1.3.0] - 2023-12-06
+
+### Changes
+
+- The `@Option`, `@Argument`, `@Flag`, and `@OptionGroup` property wrappers now 
+  conditionally conform to `Sendable` when the wrapper's `Value` type conforms. With this
+  change, you can mark `ParsableCommand` types as `Sendable` when you want to be able to
+  pass a parsed command across concurrent contexts. ([#582])
+
+  *Migration:* Users that aren't ready to resolve sendability warnings can add the
+  `@preconcurrency` attribute to `import ArgumentParser` statements.
+
+- To support migration to `Sendable` annotation, the minimum Swift version for
+  `swift-argument-parser` has been increased to Swift 5.7. Users of older Swift versions
+  will be able to continue using version 1.2.3 of the library. ([#582])
+
 ### Additions
 
 - Help screens now include possible options for `ExpressibleByArgument` types
@@ -13,8 +33,19 @@ Add new items at the end of the relevant section under **Unreleased**.
   not need to manually implement `allValueStrings`, instead it is derived from
   `allCases`. ([#594])
 
-<!-- Add: "Don't remove nested option group titles (#592)" -->
-<!-- Add: "Document ability to skip unknown parameters (#572)" -->
+### Fixes
+
+- The titles for nested option groups are preserved when embedded into commands without
+  specifying a new title. ([#592])
+- When wrapping help and error messages, the library now uses the `COLUMNS` environment
+  variable when set, instead of immediately falling back to 80 columns. ([#596])
+- Bash completion scripts now respect the extensions given in a `.file(...)` completion
+  kind. ([#590])
+- Bash completion scripts now properly escape command names that include hyphens. ([#573])
+- Documentation improvements. ([#572], [#565], [#602])
+
+The 1.2.3 release includes contributions from [Alkenso], [compnerd], [gwynne],
+[kennyyork], [natecook1000], [rauhul], [robertmryan], and [vlm]. Thank you!
 
 ---
 
@@ -803,7 +834,8 @@ This changelog's format is based on [Keep a Changelog](https://keepachangelog.co
 
 <!-- Link references for releases -->
 
-[Unreleased]: https://github.com/apple/swift-argument-parser/compare/1.2.3...HEAD
+[Unreleased]: https://github.com/apple/swift-argument-parser/compare/1.3.0...HEAD
+[1.3.0]: https://github.com/apple/swift-argument-parser/compare/1.2.3...1.3.0
 [1.2.3]: https://github.com/apple/swift-argument-parser/compare/1.2.2...1.2.3
 [1.2.2]: https://github.com/apple/swift-argument-parser/compare/1.2.1...1.2.2
 [1.2.1]: https://github.com/apple/swift-argument-parser/compare/1.2.0...1.2.1
@@ -897,9 +929,17 @@ This changelog's format is based on [Keep a Changelog](https://keepachangelog.co
 [#550]: https://github.com/apple/swift-argument-parser/pull/550
 [#552]: https://github.com/apple/swift-argument-parser/pull/552
 [#554]: https://github.com/apple/swift-argument-parser/pull/554
+[#565]: https://github.com/apple/swift-argument-parser/pull/565
+[#572]: https://github.com/apple/swift-argument-parser/pull/572
+[#573]: https://github.com/apple/swift-argument-parser/pull/573
 [#574]: https://github.com/apple/swift-argument-parser/pull/574
 [#579]: https://github.com/apple/swift-argument-parser/pull/579
-[#579]: https://github.com/apple/swift-argument-parser/pull/594
+[#582]: https://github.com/apple/swift-argument-parser/pull/582
+[#590]: https://github.com/apple/swift-argument-parser/pull/590
+[#592]: https://github.com/apple/swift-argument-parser/pull/592
+[#594]: https://github.com/apple/swift-argument-parser/pull/594
+[#596]: https://github.com/apple/swift-argument-parser/pull/596
+[#602]: https://github.com/apple/swift-argument-parser/pull/602
 
 <!-- Link references for contributors -->
 
@@ -907,6 +947,7 @@ This changelog's format is based on [Keep a Changelog](https://keepachangelog.co
 [adellibovi]: https://github.com/apple/swift-argument-parser/commits?author=adellibovi
 [aleksey-mashanov]: https://github.com/apple/swift-argument-parser/commits?author=aleksey-mashanov
 [AliSoftware]: https://github.com/apple/swift-argument-parser/commits?author=AliSoftware
+[Alkenso]: https://github.com/apple/swift-argument-parser/commits?author=Alkenso
 [allevato]: https://github.com/apple/swift-argument-parser/commits?author=allevato
 [artemnovichkov]: https://github.com/apple/swift-argument-parser/commits?author=artemnovichkov
 [atierian]: https://github.com/apple/swift-argument-parser/commits?author=atierian
@@ -968,6 +1009,7 @@ This changelog's format is based on [Keep a Changelog](https://keepachangelog.co
 [rauhul]: https://github.com/apple/swift-argument-parser/commits?author=rauhul
 [rickrizzo]: https://github.com/apple/swift-argument-parser/commits?author=rickrizzo
 [rjstelling]: https://github.com/apple/swift-argument-parser/commits?author=rjstelling
+[robertmryan]: https://github.com/apple/swift-argument-parser/commits?author=robertmryan
 [Sajjon]: https://github.com/apple/swift-argument-parser/commits?author=Sajjon
 [schlagelk]: https://github.com/apple/swift-argument-parser/commits?author=schlagelk
 [SergeyPetrachkov]: https://github.com/apple/swift-argument-parser/commits?author=SergeyPetrachkov
@@ -978,6 +1020,7 @@ This changelog's format is based on [Keep a Changelog](https://keepachangelog.co
 [thomasvl]: https://github.com/apple/swift-argument-parser/commits?author=thomasvl
 [TiagoMaiaL]: https://github.com/apple/swift-argument-parser/commits?author=TiagoMaiaL
 [toddthomas]: https://github.com/apple/swift-argument-parser/commits?author=toddthomas
+[vlm]: https://github.com/apple/swift-argument-parser/commits?author=vlm
 [werm098]: https://github.com/apple/swift-argument-parser/commits?author=werm098
 [Wevah]: https://github.com/apple/swift-argument-parser/commits?author=Wevah
 [Wildchild9]: https://github.com/apple/swift-argument-parser/commits?author=Wildchild9
diff --git a/README.md b/README.md
index 89b2cf88..91360ed1 100644
--- a/README.md
+++ b/README.md
@@ -123,7 +123,7 @@ let package = Package(
     // name, platforms, products, etc.
     dependencies: [
         // other dependencies
-        .package(url: "https://github.com/apple/swift-argument-parser", from: "1.2.0"),
+        .package(url: "https://github.com/apple/swift-argument-parser", from: "1.3.0"),
     ],
     targets: [
         .executableTarget(name: "<command-line-tool>", dependencies: [
@@ -144,4 +144,4 @@ swift-argument-parser | Minimum Swift Version
 `0.0.1 ..< 0.2.0`     | 5.1
 `0.2.0 ..< 1.1.0`     | 5.2
 `1.1.0 ..< 1.3.0`     | 5.5
-`1.3.0 ...` (future)  | 5.7
+`1.3.0 ...`           | 5.7
diff --git a/Sources/ArgumentParser/Documentation.docc/Articles/GettingStarted.md b/Sources/ArgumentParser/Documentation.docc/Articles/GettingStarted.md
index ea90bfda..a9be9ccf 100644
--- a/Sources/ArgumentParser/Documentation.docc/Articles/GettingStarted.md
+++ b/Sources/ArgumentParser/Documentation.docc/Articles/GettingStarted.md
@@ -21,7 +21,7 @@ import PackageDescription
 let package = Package(
     name: "Count",
     dependencies: [
-        .package(url: "https://github.com/apple/swift-argument-parser.git", from: "1.2.0"),
+        .package(url: "https://github.com/apple/swift-argument-parser.git", from: "1.3.0"),
     ],
     targets: [
         .executableTarget(