diff --git a/source/VMelnalksnis.NordigenDotNet/Tokens/AccessToken.cs b/source/VMelnalksnis.NordigenDotNet/Tokens/AccessToken.cs
index 4148651..b884d45 100644
--- a/source/VMelnalksnis.NordigenDotNet/Tokens/AccessToken.cs
+++ b/source/VMelnalksnis.NordigenDotNet/Tokens/AccessToken.cs
@@ -6,6 +6,17 @@ using System.Text.Json.Serialization;
 
 namespace VMelnalksnis.NordigenDotNet.Tokens;
 
-internal record AccessToken(
-	string Access,
-	[property: JsonPropertyName("access_expires")] int AccessExpires);
+internal class AccessToken
+{
+	[JsonConstructor]
+	public AccessToken(string access, int accessExpires)
+	{
+		Access = access;
+		AccessExpires = accessExpires;
+	}
+
+	public string Access { get; }
+
+	[JsonPropertyName("access_expires")]
+	public int AccessExpires { get; }
+}
diff --git a/source/VMelnalksnis.NordigenDotNet/Tokens/Token.cs b/source/VMelnalksnis.NordigenDotNet/Tokens/Token.cs
index f83110d..bbe1b82 100644
--- a/source/VMelnalksnis.NordigenDotNet/Tokens/Token.cs
+++ b/source/VMelnalksnis.NordigenDotNet/Tokens/Token.cs
@@ -6,8 +6,18 @@ using System.Text.Json.Serialization;
 
 namespace VMelnalksnis.NordigenDotNet.Tokens;
 
-internal record Token(
-	string Access,
-	int AccessExpires,
-	string Refresh,
-	[property: JsonPropertyName("refresh_expires")] int RefreshExpires) : AccessToken(Access, AccessExpires);
+internal class Token : AccessToken
+{
+	[JsonConstructor]
+	public Token(string access, int accessExpires, string refresh, int refreshExpires)
+		: base(access, accessExpires)
+	{
+		Refresh = refresh;
+		RefreshExpires = refreshExpires;
+	}
+
+	public string Refresh { get; }
+
+	[JsonPropertyName("refresh_expires")]
+	public int RefreshExpires { get; }
+}
diff --git a/source/VMelnalksnis.NordigenDotNet/Tokens/TokenClient.cs b/source/VMelnalksnis.NordigenDotNet/Tokens/TokenClient.cs
index 8c9ae79..5cf28c8 100644
--- a/source/VMelnalksnis.NordigenDotNet/Tokens/TokenClient.cs
+++ b/source/VMelnalksnis.NordigenDotNet/Tokens/TokenClient.cs
@@ -6,14 +6,20 @@ using System.Net;
 using System.Net.Http;
 using System.Net.Http.Json;
 using System.Text.Json;
+using System.Text.Json.Serialization.Metadata;
 using System.Threading.Tasks;
 
 namespace VMelnalksnis.NordigenDotNet.Tokens;
 
 internal sealed class TokenClient
 {
+	private static readonly TokenSerializationContext _context = new(new(JsonSerializerDefaults.Web));
+	private static readonly JsonTypeInfo<AccessToken> _accessTokenInfo = (JsonTypeInfo<AccessToken>)_context.GetTypeInfo(typeof(AccessToken));
+	private static readonly JsonTypeInfo<Token> _tokenInfo = (JsonTypeInfo<Token>)_context.GetTypeInfo(typeof(Token));
+	private static readonly JsonTypeInfo<TokenCreation> _tokenCreationInfo = (JsonTypeInfo<TokenCreation>)_context.GetTypeInfo(typeof(TokenCreation));
+	private static readonly JsonTypeInfo<TokenRefresh> _tokenRefreshInfo = (JsonTypeInfo<TokenRefresh>)_context.GetTypeInfo(typeof(TokenRefresh));
+
 	private readonly HttpClient _httpClient;
-	private readonly JsonSerializerOptions _serializerOptions = new(JsonSerializerDefaults.Web);
 
 	internal TokenClient(HttpClient httpClient)
 	{
@@ -23,7 +29,7 @@ internal sealed class TokenClient
 	internal async Task<Token> New(TokenCreation tokenCreation)
 	{
 		var tokenResponse = await _httpClient
-			.PostAsJsonAsync(Routes.Tokens.New, tokenCreation, _serializerOptions)
+			.PostAsJsonAsync(Routes.Tokens.New, tokenCreation, _tokenCreationInfo)
 			.ConfigureAwait(false);
 
 		if (tokenResponse.StatusCode is not HttpStatusCode.OK)
@@ -32,28 +38,23 @@ internal sealed class TokenClient
 			throw new HttpRequestException(content);
 		}
 
-		var token = await tokenResponse.Content
-			.ReadFromJsonAsync<Token>(_serializerOptions)
-			.ConfigureAwait(false);
-
+		var token = await tokenResponse.Content.ReadFromJsonAsync(_tokenInfo).ConfigureAwait(false);
 		return token!;
 	}
 
 	internal async Task<AccessToken> Refresh(TokenRefresh tokenRefresh)
 	{
 		var tokenResponse = await _httpClient
-			.PostAsJsonAsync(Routes.Tokens.Refresh, tokenRefresh, _serializerOptions)
+			.PostAsJsonAsync(Routes.Tokens.Refresh, tokenRefresh, _tokenRefreshInfo)
 			.ConfigureAwait(false);
 
 		if (tokenResponse.StatusCode is not HttpStatusCode.OK)
 		{
 			var content = await tokenResponse.Content.ReadAsStringAsync().ConfigureAwait(false);
-			throw new HttpRequestException(content);
+			throw new HttpRequestException(content, null, tokenResponse.StatusCode);
 		}
 
-		var accessToken = await tokenResponse.Content
-			.ReadFromJsonAsync<AccessToken>(_serializerOptions)
-			.ConfigureAwait(false);
+		var accessToken = await tokenResponse.Content.ReadFromJsonAsync(_accessTokenInfo).ConfigureAwait(false);
 
 		return accessToken!;
 	}
diff --git a/source/VMelnalksnis.NordigenDotNet/Tokens/TokenCreation.cs b/source/VMelnalksnis.NordigenDotNet/Tokens/TokenCreation.cs
index 6e1934e..b997a69 100644
--- a/source/VMelnalksnis.NordigenDotNet/Tokens/TokenCreation.cs
+++ b/source/VMelnalksnis.NordigenDotNet/Tokens/TokenCreation.cs
@@ -6,6 +6,18 @@ using System.Text.Json.Serialization;
 
 namespace VMelnalksnis.NordigenDotNet.Tokens;
 
-internal sealed record TokenCreation(
-	[property: JsonPropertyName("secret_id")] string SecretId,
-	[property: JsonPropertyName("secret_key")] string SecretKey);
+internal sealed class TokenCreation
+{
+	[JsonConstructor]
+	public TokenCreation(string secretId, string secretKey)
+	{
+		SecretId = secretId;
+		SecretKey = secretKey;
+	}
+
+	[JsonPropertyName("secret_id")]
+	public string SecretId { get; }
+
+	[JsonPropertyName("secret_key")]
+	public string SecretKey { get; }
+}
diff --git a/source/VMelnalksnis.NordigenDotNet/Tokens/TokenRefresh.cs b/source/VMelnalksnis.NordigenDotNet/Tokens/TokenRefresh.cs
index b6dc601..0726b23 100644
--- a/source/VMelnalksnis.NordigenDotNet/Tokens/TokenRefresh.cs
+++ b/source/VMelnalksnis.NordigenDotNet/Tokens/TokenRefresh.cs
@@ -2,6 +2,17 @@
 // Licensed under the Apache License 2.0.
 // See LICENSE file in the project root for full license information.
 
+using System.Text.Json.Serialization;
+
 namespace VMelnalksnis.NordigenDotNet.Tokens;
 
-internal sealed record TokenRefresh(string Refresh);
+internal sealed class TokenRefresh
+{
+	[JsonConstructor]
+	public TokenRefresh(string refresh)
+	{
+		Refresh = refresh;
+	}
+
+	public string Refresh { get; }
+}
diff --git a/source/VMelnalksnis.NordigenDotNet/Tokens/TokenSerializationContext.cs b/source/VMelnalksnis.NordigenDotNet/Tokens/TokenSerializationContext.cs
new file mode 100644
index 0000000..7de9286
--- /dev/null
+++ b/source/VMelnalksnis.NordigenDotNet/Tokens/TokenSerializationContext.cs
@@ -0,0 +1,16 @@
+// Copyright 2022 Valters Melnalksnis
+// Licensed under the Apache License 2.0.
+// See LICENSE file in the project root for full license information.
+
+using System.Text.Json.Serialization;
+
+namespace VMelnalksnis.NordigenDotNet.Tokens;
+
+/// <inheritdoc />
+[JsonSerializable(typeof(AccessToken))]
+[JsonSerializable(typeof(Token))]
+[JsonSerializable(typeof(TokenCreation))]
+[JsonSerializable(typeof(TokenRefresh))]
+internal partial class TokenSerializationContext : JsonSerializerContext
+{
+}