diff --git a/Sources/JWTKit/Claims/LocaleClaim.swift b/Sources/JWTKit/Claims/LocaleClaim.swift
index c420bc7d..b7517f50 100644
--- a/Sources/JWTKit/Claims/LocaleClaim.swift
+++ b/Sources/JWTKit/Claims/LocaleClaim.swift
@@ -12,4 +12,16 @@ public struct LocaleClaim: JWTClaim, Equatable, ExpressibleByStringLiteral {
     public init(stringLiteral value: String) {
         self.value = Locale(identifier: value)
     }
+
+    /// See `Decodable`.
+    public init(from decoder: Decoder) throws {
+        let container = try decoder.singleValueContainer()
+        try self.init(value: Locale(identifier: container.decode(String.self)))
+    }
+
+    /// See `Encodable`.
+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.singleValueContainer()
+        try container.encode(value.identifier)
+    }
 }
diff --git a/Tests/JWTKitTests/JWTKitTests.swift b/Tests/JWTKitTests/JWTKitTests.swift
index 18bfb470..9a9b195b 100644
--- a/Tests/JWTKitTests/JWTKitTests.swift
+++ b/Tests/JWTKitTests/JWTKitTests.swift
@@ -271,6 +271,37 @@ class JWTKitTests: XCTestCase {
         data = #"{"bad":"Not boolean"}"#.data(using: .utf8)!
         XCTAssertThrowsError(try JSONDecoder().decode(BoolPayload.self, from: data))
     }
+
+    func testLocaleClaim() throws {
+        let ptBR = #"{"locale":"pt-BR"}"#
+
+        let plainEnglish = try LocalePayload.from(#"{"locale":"en"}"#)
+        let brazillianPortugese = try LocalePayload.from(ptBR)
+        let nadizaDialectSlovenia = try LocalePayload.from(#"{"locale":"sl-nedis"}"#)
+        let germanSwissPost1996 = try LocalePayload.from(#"{"locale":"de-CH-1996"}"#)
+        let chineseTraditionalTwoPrivate = try LocalePayload.from(#"{"locale":"zh-Hant-CN-x-private1-private2"}"#)
+
+        XCTAssertEqual(plainEnglish.locale.value.identifier, "en")
+        XCTAssertEqual(brazillianPortugese.locale.value.identifier, "pt-BR")
+        XCTAssertEqual(nadizaDialectSlovenia.locale.value.identifier, "sl-nedis")
+        XCTAssertEqual(germanSwissPost1996.locale.value.identifier, "de-CH-1996")
+        XCTAssertEqual(chineseTraditionalTwoPrivate.locale.value.identifier, "zh-Hant-CN-x-private1-private2")
+
+        let encoded = try JSONEncoder().encode(brazillianPortugese)
+        let string = String(bytes: encoded, encoding: .utf8)!
+        XCTAssertEqual(string, ptBR)
+    }
+}
+
+struct LocalePayload: Codable {
+    var locale: LocaleClaim
+}
+
+extension LocalePayload {
+    static func from(_ string: String) throws -> LocalePayload {
+        let data = string.data(using: .utf8)!
+        return try JSONDecoder().decode(LocalePayload.self, from: data)
+    }
 }
 
 struct BoolPayload: Decodable {