diff --git a/src/Api/Card.cs b/src/Api/Card.cs
index 99974b5..06118d1 100644
--- a/src/Api/Card.cs
+++ b/src/Api/Card.cs
@@ -1,4 +1,5 @@
-using JpnCardsPokemonSdk.Client.Endpoints;
+using System.Text.Json.Serialization;
+using JpnCardsPokemonSdk.Client.Endpoints;
 
 namespace JpnCardsPokemonSdk.Api;
 
@@ -8,6 +9,7 @@ public class Card : EndpointObject
 
     public int Id { get; set; }
 
+    [JsonPropertyName("setData")]
     public Set? Set { get; set; }
 
     public string[]? Types { get; set; }
@@ -30,6 +32,7 @@ public class Card : EndpointObject
     // TODO: Type of property is not documented. Has to be evaluated at a later time.
     // public Resistance[]? Ressistences { get; set; }
 
+    [JsonPropertyName("retreatCost")]
     public string[]? RetreatCosts { get; set; }
 
     public int? ConvertedRetreadCost { get; set; }
@@ -43,10 +46,15 @@ public class Card : EndpointObject
     // TODO: Type of property is not documented. Has to be evaluated at a later time.
     // public Legality[]? Legalities { get; set; }
 
+    public string? Artist { get; set; }
+
+    [JsonPropertyName("image_url")]
     public string? ImageUrl { get; set; }
 
+    [JsonPropertyName("card_url")]
     public string? CardUrl { get; set; }
 
+    [JsonPropertyName("sequenceNumber")]
     public int Number { get; set; }
 
     public string? PrintedNumber { get; set; }
diff --git a/src/Api/Set.cs b/src/Api/Set.cs
index 8ba6e8c..9358072 100644
--- a/src/Api/Set.cs
+++ b/src/Api/Set.cs
@@ -1,4 +1,5 @@
-using JpnCardsPokemonSdk.Client.Endpoints;
+using System.Text.Json.Serialization;
+using JpnCardsPokemonSdk.Client.Endpoints;
 
 namespace JpnCardsPokemonSdk.Api;
 
@@ -8,8 +9,10 @@ public class Set : EndpointObject
 
     public int Id { get; set; }
 
+    [JsonPropertyName("source_url")]
     public string? SourceUrl { get; set; }
 
+    [JsonPropertyName("image_url")]
     public string? ImageUrl { get; set; }
 
     public string? Language { get; set; }
@@ -19,10 +22,13 @@ public class Set : EndpointObject
     // TODO: According to documentation the property currently is not supported.
     // public DateOnly? Date { get; set; }
 
+    [JsonPropertyName("card_count")]
     public int TotalCardCount { get; set; }
 
+    [JsonPropertyName("printed_count")]
     public int PrintedCardCount { get; set; }
 
+    [JsonPropertyName("set_code")]
     public string? SetCode { get; set; }
 
     public int Uuid { get; set; }