diff --git a/Sources/X509/CMakeLists.txt b/Sources/X509/CMakeLists.txt
index a0ee553..b048e08 100644
--- a/Sources/X509/CMakeLists.txt
+++ b/Sources/X509/CMakeLists.txt
@@ -118,6 +118,7 @@ add_library(X509
   "X509BaseTypes/Time.swift"
   "X509BaseTypes/TimeCalculations.swift"
   "X509BaseTypes/Validity.swift"
+  "X509SendableMetatype.swift"
 )
 
 target_link_libraries(X509 PUBLIC
diff --git a/Sources/X509/Verifier/VerifierPolicy.swift b/Sources/X509/Verifier/VerifierPolicy.swift
index c1c4e71..2826407 100644
--- a/Sources/X509/Verifier/VerifierPolicy.swift
+++ b/Sources/X509/Verifier/VerifierPolicy.swift
@@ -28,8 +28,9 @@ import SwiftASN1
 /// the basic checks from that RFC. Other objects are less common, such as ``OCSPVerifierPolicy``, which performs live
 /// revocation checking. Users can also implement their own policies to enable swift-certificates to support other
 /// use-cases.
+@preconcurrency
 @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, macCatalyst 13, visionOS 1.0, *)
-public protocol VerifierPolicy {
+public protocol VerifierPolicy: _X509SendableMetatype {
     /// The X.509 extension types that this policy understands and enforces.
     ///
     /// X.509 certificates can have extensions marked as `critical`. These extensions _must_ be understood and enforced by the
diff --git a/Sources/X509/X509SendableMetatype.swift b/Sources/X509/X509SendableMetatype.swift
new file mode 100644
index 0000000..c5aba0d
--- /dev/null
+++ b/Sources/X509/X509SendableMetatype.swift
@@ -0,0 +1,19 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the SwiftCertificates open source project
+//
+// Copyright (c) 2025 Apple Inc. and the SwiftCertificates project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of SwiftCertificates project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+#if compiler(>=6.2)
+public typealias _X509SendableMetatype = SendableMetatype
+#else
+public typealias _X509SendableMetatype = Any
+#endif