diff --git a/Sources/JWSETKit/Cryptography/Algorithms/KeyEncryption.swift b/Sources/JWSETKit/Cryptography/Algorithms/KeyEncryption.swift
index da2379f..5d2eb1c 100644
--- a/Sources/JWSETKit/Cryptography/Algorithms/KeyEncryption.swift
+++ b/Sources/JWSETKit/Cryptography/Algorithms/KeyEncryption.swift
@@ -468,5 +468,5 @@ extension JSONWebAlgorithm where Self == JSONWebKeyEncryptionAlgorithm {
     public static var ecdhEphemeralStaticAESKeyWrap256: Self { "ECDH-ES+A256KW" }
     
     /// **Key Management**: No encryption for content key.
-    public static var direct: Self { "direct" }
+    public static var direct: Self { "dir" }
 }
diff --git a/Sources/JWSETKit/Entities/JWS/JWS.swift b/Sources/JWSETKit/Entities/JWS/JWS.swift
index 1cff41a..8a5e6ff 100644
--- a/Sources/JWSETKit/Entities/JWS/JWS.swift
+++ b/Sources/JWSETKit/Entities/JWS/JWS.swift
@@ -157,7 +157,7 @@ public struct JSONWebSignature<Payload: ProtectedWebContainer>: Hashable, Sendab
 
 extension String {
     public init<Payload: ProtectedWebContainer>(jws: JSONWebSignature<Payload>) throws {
-        var encoder = JSONEncoder.encoder
+        let encoder = JSONEncoder.encoder
         encoder.userInfo[.jwsEncodedRepresentation] = JSONWebSignatureRepresentation.compact
         self = try String(String(decoding: encoder.encode(jws), as: UTF8.self).dropFirst().dropLast())
     }
diff --git a/Sources/JWSETKit/Extensions/Lock.swift b/Sources/JWSETKit/Extensions/Lock.swift
index 887454c..cbd28d6 100644
--- a/Sources/JWSETKit/Extensions/Lock.swift
+++ b/Sources/JWSETKit/Extensions/Lock.swift
@@ -7,7 +7,7 @@
 
 import Foundation
 
-final class ReadWriteLock: Sendable {
+final class ReadWriteLock: @unchecked Sendable {
     private let lock: UnsafeMutablePointer<pthread_rwlock_t>
     
     init() {
@@ -39,7 +39,7 @@ final class ReadWriteLock: Sendable {
 
 /// Synchronizing read and writes on a shared mutable property.
 @propertyWrapper
-public struct ReadWriteLocked<T> {
+public final class ReadWriteLocked<T>: @unchecked Sendable {
     private let lock = ReadWriteLock()
     private var _value: T
     
@@ -56,5 +56,3 @@ public struct ReadWriteLocked<T> {
         self._value = wrappedValue
     }
 }
-
-extension ReadWriteLocked: Sendable where T: Sendable {}