diff --git a/Package.swift b/Package.swift
index 3adbed8..6f5c24e 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,11 +1,11 @@
-// swift-tools-version:5.9
+// swift-tools-version:6.0
 import PackageDescription
 
 let package = Package(
     name: "TwoFa", // Defines the package name as TwoFa
     platforms: [
-        .macOS(.v14), // macOS 14 and later
-        .iOS(.v17) // iOS 17 and later
+        .macOS(.v15), // macOS 14 and later
+        .iOS(.v18) // iOS 17 and later
     ], // Specifies the platforms supported by the package
     products: [
         .library(
diff --git a/Sources/TwoFa/util/OTPArc/OTPArc+Const.swift b/Sources/TwoFa/util/OTPArc/OTPArc+Const.swift
index eef0896..42f8289 100644
--- a/Sources/TwoFa/util/OTPArc/OTPArc+Const.swift
+++ b/Sources/TwoFa/util/OTPArc/OTPArc+Const.swift
@@ -16,6 +16,14 @@ extension OTPArc {
       internal let lineWidth: CGFloat
       /**
        * - Note: Needed for public init
+       * - Parameters:
+       *   - tints: - Fixme: ⚠️️ Add doc
+       *   - iconSize: - Fixme: ⚠️️ Add doc
+       *   - font: - Fixme: ⚠️️ Add doc
+       *   - fontColor: - Fixme: ⚠️️ Add doc
+       *   - bgStrokColor: - Fixme: ⚠️️ Add doc
+       *   - background: - Fixme: ⚠️️ Add doc
+       *   - lineWidth: - Fixme: ⚠️️ Add doc
        */
       public init(tints: (idle: Color, start: Color, end: Color), iconSize: CGFloat, font: Font, fontColor: Color, bgStrokColor: Color, background: Color, lineWidth: CGFloat) {
          self.tints = tints
@@ -29,7 +37,7 @@ extension OTPArc {
       /**
        * Default graph style
        */
-      public static let defaultGraphStyle: GraphStyle = {
+      public static var defaultGraphStyle: GraphStyle {
          .init(
             tints: (.blue, .green, .red),
             iconSize: 24,
@@ -39,6 +47,6 @@ extension OTPArc {
             background: .clear,
             lineWidth: 3
          )
-      }()
+      }
    }
 }
diff --git a/Sources/TwoFa/util/OTPArc/OTPArc+Preview.swift b/Sources/TwoFa/util/OTPArc/OTPArc+Preview.swift
index 464e554..54b3fed 100644
--- a/Sources/TwoFa/util/OTPArc/OTPArc+Preview.swift
+++ b/Sources/TwoFa/util/OTPArc/OTPArc+Preview.swift
@@ -1,5 +1,7 @@
 import SwiftUI
-
+/**
+ * - Fixme: ⚠️️ Add doc
+ */
 #Preview {
    let url: URL = .init(string: "otpauth://hotp/test?secret=6UAOpz+x3dsNrQ==&algorithm=SHA512&digits=6&counter=1")!
    let account: OTPAccount = try! .init(url: url)
diff --git a/Sources/TwoFa/util/OTPArc/OTPArc.swift b/Sources/TwoFa/util/OTPArc/OTPArc.swift
index c7e56d6..9fbcf7a 100644
--- a/Sources/TwoFa/util/OTPArc/OTPArc.swift
+++ b/Sources/TwoFa/util/OTPArc/OTPArc.swift
@@ -59,7 +59,9 @@ public struct OTPArc: View {
     *               `OTPAccount`. If an account is provided, it 
     *               initializes an `OTPTimer` to manage OTP 
     *               generation timing.
-    * - Parameter account: The data model to generate timer from etc
+    * - Parameters:
+    *   - account: The data model to generate timer from etc
+    *   - graphStyle: - Fixme: ⚠️️ Add doc
     */
    public init(account: OTPAccount?, graphStyle: GraphStyle = .defaultGraphStyle) {
       self.account = account
diff --git a/Sources/TwoFa/util/OTPTimer.swift b/Sources/TwoFa/util/OTPTimer.swift
index d43b6ba..679c253 100644
--- a/Sources/TwoFa/util/OTPTimer.swift
+++ b/Sources/TwoFa/util/OTPTimer.swift
@@ -156,7 +156,9 @@ extension OTPTimer {
     *                to the console.
     * - Note: If you forget to add event handler, this will be called
     */
-   fileprivate static let defaultOnChange: OTPTimerCallback = { (_: OTPTimer) in
-      Swift.print("Default onChange")
+   fileprivate static var defaultOnChange: OTPTimerCallback {
+      { (_: OTPTimer) in
+         Swift.print("Default onChange")
+      }
    }
 }