diff --git a/Sources/WebAuthn/Helpers/ChallengeGenerator.swift b/Sources/WebAuthn/Helpers/ChallengeGenerator.swift
index ecbaa69..f46b3e2 100644
--- a/Sources/WebAuthn/Helpers/ChallengeGenerator.swift
+++ b/Sources/WebAuthn/Helpers/ChallengeGenerator.swift
@@ -11,10 +11,14 @@
 //
 //===----------------------------------------------------------------------===//
 
-package struct ChallengeGenerator: Sendable {
-    var generate: @Sendable () -> [UInt8]
+public struct ChallengeGenerator: Sendable {
+    public var generate: @Sendable () -> [UInt8]
 
-    package static var live: Self {
+    public init(generate: @Sendable @escaping () -> [UInt8]) {
+        self.generate = generate
+    }
+  
+    public static var live: Self {
         .init(generate: { [UInt8].random(count: 32) })
     }
 }
diff --git a/Sources/WebAuthn/WebAuthnManager.swift b/Sources/WebAuthn/WebAuthnManager.swift
index 299089b..0cc5ad5 100644
--- a/Sources/WebAuthn/WebAuthnManager.swift
+++ b/Sources/WebAuthn/WebAuthnManager.swift
@@ -35,11 +35,8 @@ public struct WebAuthnManager: Sendable {
     ///
     /// - Parameters:
     ///   - configuration: The configuration to use for this manager.
-    public init(configuration: Configuration) {
-        self.init(configuration: configuration, challengeGenerator: .live)
-    }
-    
-    package init(configuration: Configuration, challengeGenerator: ChallengeGenerator) {
+    ///   - challengeGenerator: The generator of challenge.
+    public init(configuration: Configuration, challengeGenerator: ChallengeGenerator = .live) {
         self.configuration = configuration
         self.challengeGenerator = challengeGenerator
     }