diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d4bd22f..c842129 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,12 +13,12 @@ jobs:
 
     steps:
       - name: Set up Swift
-        uses: swift-actions/setup-swift@3aed395c5397f62deb91d8fe7af1418a9ae4d16f # v2.1.0
+        uses: SwiftyLab/setup-swift@38f54a76b70d989321de9dc7c840618c08cf56e9 # v1.14.0
         with:
-          swift-version: "5.10.0"
+          swift-version: "6.3.1"
 
       - name: Checkout
-        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Test
         run: make test
diff --git a/.gitignore b/.gitignore
index 410dfea..16e8489 100644
--- a/.gitignore
+++ b/.gitignore
@@ -65,3 +65,5 @@ fastlane/test_output
 
 .release/
 .smoke/
+
+.vscode/
diff --git a/.swift-version b/.swift-version
index 509b0b6..dc0208a 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-5.10.0
+6.3.1
diff --git a/Package.swift b/Package.swift
index 7b9e4b3..12cf3a9 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version: 5.10
+// swift-tools-version: 6.3
 
 import PackageDescription
 
@@ -17,7 +17,7 @@ let package = Package(
     targets: [
         .target(
             name: "ComicSans",
-            path: "Sources/Comicsans"
+            path: "Sources/ComicSans",
         ),
         .executableTarget(
             name: "CommandLineTool",
@@ -25,14 +25,14 @@ let package = Package(
                 .product(name: "ArgumentParser", package: "swift-argument-parser"),
                 "ComicSans",
             ],
-            path: "Sources/CommandLineTool"
+            path: "Sources/CommandLineTool",
         ),
         .testTarget(
             name: "ComicSansTests",
             dependencies: [
                 "ComicSans",
             ],
-            path: "Tests/ComicSansTests"
+            path: "Tests/ComicSansTests",
         ),
-    ]
+    ],
 )
diff --git a/Sources/ComicSans/ComicSans.swift b/Sources/ComicSans/ComicSans.swift
index 3fa022c..0f86a9d 100644
--- a/Sources/ComicSans/ComicSans.swift
+++ b/Sources/ComicSans/ComicSans.swift
@@ -1,23 +1,31 @@
 import Foundation
 import SwiftUI
 
-public struct ComicSans {
+public struct ComicSans: Sendable {
     let text: String
-    public let view: ComicSansView
+    let padding: Int
+    let horizontalAlignment: HorizontalAlignmentOption
+    let verticalAlignment: VerticalAlignmentOption
+
+    @MainActor public var view: ComicSansView {
+        ComicSansView(
+            text: text,
+            padding: padding,
+            horizontalAlignment: horizontalAlignment,
+            verticalAlignment: verticalAlignment,
+        )
+    }
 
     public init(
         _ text: String,
         padding: Int = 4,
         horizontalAlignment: HorizontalAlignmentOption = .leading,
-        verticalAlignment: VerticalAlignmentOption = .center
+        verticalAlignment: VerticalAlignmentOption = .center,
     ) {
         self.text = text
-        view = ComicSansView(
-            text: text,
-            padding: padding,
-            horizontalAlignment: horizontalAlignment,
-            verticalAlignment: verticalAlignment
-        )
+        self.padding = padding
+        self.horizontalAlignment = horizontalAlignment
+        self.verticalAlignment = verticalAlignment
     }
 
     public func emojiName() -> String? {
diff --git a/Sources/ComicSans/ComicSansView.swift b/Sources/ComicSans/ComicSansView.swift
index 5c09683..db41886 100644
--- a/Sources/ComicSans/ComicSansView.swift
+++ b/Sources/ComicSans/ComicSansView.swift
@@ -13,7 +13,7 @@ public struct ComicSansView: View {
         text: String,
         padding: Int,
         horizontalAlignment: HorizontalAlignmentOption,
-        verticalAlignment: VerticalAlignmentOption
+        verticalAlignment: VerticalAlignmentOption,
     ) {
         self.text = text
         self.padding = padding
@@ -30,7 +30,7 @@ public struct ComicSansView: View {
         horizontalAlignment: HorizontalAlignmentOption,
         verticalAlignment: VerticalAlignmentOption,
         lineHeightMultiple: CGFloat,
-        debug: Bool
+        debug: Bool,
     ) {
         self.text = text
         self.padding = padding
@@ -139,7 +139,7 @@ enum Constants {
                             horizontalAlignment: horizontalAlignment,
                             verticalAlignment: verticalAlignment,
                             lineHeightMultiple: lineHeightMultiple,
-                            debug: debug
+                            debug: debug,
                         )
                     }
                     .padding(1)
@@ -171,7 +171,7 @@ enum Constants {
             padding: 8,
             horizontalAlignment: .leading,
             verticalAlignment: .center,
-            debug: true
+            debug: true,
         )
     }
 
diff --git a/Sources/ComicSans/HorizontalAlignmentOption.swift b/Sources/ComicSans/HorizontalAlignmentOption.swift
index 81e3c50..aa35927 100644
--- a/Sources/ComicSans/HorizontalAlignmentOption.swift
+++ b/Sources/ComicSans/HorizontalAlignmentOption.swift
@@ -1,6 +1,6 @@
 import SwiftUI
 
-public enum HorizontalAlignmentOption: String, CaseIterable {
+public enum HorizontalAlignmentOption: String, CaseIterable, Sendable {
     case leading
     case center
     case trailing
diff --git a/Sources/ComicSans/VerticalAlignmentOption.swift b/Sources/ComicSans/VerticalAlignmentOption.swift
index 42d1f66..a8b7e39 100644
--- a/Sources/ComicSans/VerticalAlignmentOption.swift
+++ b/Sources/ComicSans/VerticalAlignmentOption.swift
@@ -1,4 +1,4 @@
-public enum VerticalAlignmentOption: String, CaseIterable {
+public enum VerticalAlignmentOption: String, CaseIterable, Sendable {
     case top
     case center
     case bottom
diff --git a/Sources/CommandLineTool/cs.swift b/Sources/CommandLineTool/cs.swift
index aa76e3a..a9cf875 100644
--- a/Sources/CommandLineTool/cs.swift
+++ b/Sources/CommandLineTool/cs.swift
@@ -4,8 +4,8 @@ import Darwin
 import SwiftUI
 
 @main
-struct CommandLineTool: ParsableCommand {
-    static var configuration = CommandConfiguration(
+struct CommandLineTool: @MainActor ParsableCommand {
+    static let configuration = CommandConfiguration(
         commandName: "cs",
         abstract: "cs (comic sans) for :pink-slack-emoji:",
         usage: """
@@ -19,7 +19,7 @@ struct CommandLineTool: ParsableCommand {
         Converts text to pink comic sans slack emoji. https://github.com/keyz/comicsans
         """,
         version: "0.5.0",
-        helpNames: .long
+        helpNames: .long,
     )
 
     @Argument(help: "Text to convert")
@@ -38,7 +38,7 @@ struct CommandLineTool: ParsableCommand {
     var output: URL = .currentDirectory()
 
     private lazy var isBeingPiped: Bool = isatty(fileno(stdin)) == 0
-    private lazy var isExpectingPipe: Bool = text == "-" && CommandLine.arguments.last == "-"
+    private lazy var isExpectingPipe: Bool = text == "-"
 
     mutating func validate() throws {
         guard [0, 4, 8, 12, 16, 20, 24].contains(padding) else {
@@ -64,12 +64,12 @@ struct CommandLineTool: ParsableCommand {
             text,
             padding: padding,
             horizontalAlignment: horizontal,
-            verticalAlignment: vertical
+            verticalAlignment: vertical,
         )
 
         let targetPath = try uniqueFilePath(
             basename: result.emojiName() ?? "unknown",
-            fileExtension: "png"
+            fileExtension: "png",
         )
 
         guard let pngData = result.pngRepresentation() else {