diff --git a/Sources/AnyCodable/AnyCodable.swift b/Sources/AnyCodable/AnyCodable.swift
index 5f9924d..6565855 100644
--- a/Sources/AnyCodable/AnyCodable.swift
+++ b/Sources/AnyCodable/AnyCodable.swift
@@ -12,6 +12,15 @@ import Foundation
  - SeeAlso: `AnyEncodable`
  - SeeAlso: `AnyDecodable`
  */
+#if compiler(>=5.6)
+@preconcurrency @frozen public struct AnyCodable: Codable, @unchecked Sendable {
+    public let value: Any
+
+    public init<T>(_ value: T?) {
+        self.value = value ?? ()
+    }
+}
+#else
 @frozen public struct AnyCodable: Codable {
     public let value: Any
 
@@ -19,6 +28,7 @@ import Foundation
         self.value = value ?? ()
     }
 }
+#endif
 
 extension AnyCodable: _AnyEncodable, _AnyDecodable {}
 
diff --git a/Sources/AnyCodable/AnyDecodable.swift b/Sources/AnyCodable/AnyDecodable.swift
index 9b42228..c1cdd19 100644
--- a/Sources/AnyCodable/AnyDecodable.swift
+++ b/Sources/AnyCodable/AnyDecodable.swift
@@ -31,6 +31,15 @@ import Foundation
      let decoder = JSONDecoder()
      let dictionary = try! decoder.decode([String: AnyDecodable].self, from: json)
  */
+#if compiler(>=5.6)
+@preconcurrency @frozen public struct AnyDecodable: Decodable, @unchecked Sendable {
+    public let value: Any
+
+    public init<T>(_ value: T?) {
+        self.value = value ?? ()
+    }
+}
+#else
 @frozen public struct AnyDecodable: Decodable {
     public let value: Any
 
@@ -38,6 +47,7 @@ import Foundation
         self.value = value ?? ()
     }
 }
+#endif
 
 @usableFromInline
 protocol _AnyDecodable {
diff --git a/Sources/AnyCodable/AnyEncodable.swift b/Sources/AnyCodable/AnyEncodable.swift
index d5530e5..c6ce0c6 100644
--- a/Sources/AnyCodable/AnyEncodable.swift
+++ b/Sources/AnyCodable/AnyEncodable.swift
@@ -29,6 +29,15 @@ import Foundation
      let encoder = JSONEncoder()
      let json = try! encoder.encode(dictionary)
  */
+#if compiler(>=5.6)
+@preconcurrency @frozen public struct AnyEncodable: Encodable, @unchecked Sendable {
+    public let value: Any
+
+    public init<T>(_ value: T?) {
+        self.value = value ?? ()
+    }
+}
+#else
 @frozen public struct AnyEncodable: Encodable {
     public let value: Any
 
@@ -36,6 +45,7 @@ import Foundation
         self.value = value ?? ()
     }
 }
+#endif
 
 @usableFromInline
 protocol _AnyEncodable {