diff --git a/Inventory/InventoryItem.cs b/Inventory/InventoryItem.cs
index 2919917..b37312b 100644
--- a/Inventory/InventoryItem.cs
+++ b/Inventory/InventoryItem.cs
@@ -1,4 +1,5 @@
-using MongoDB.Bson.Serialization.Attributes;
+using MongoDB.Bson;
+using MongoDB.Bson.Serialization.Attributes;
 using System.Text.Json.Serialization;
 
 namespace Core.Adapters.Lib
@@ -18,10 +19,12 @@ namespace Core.Adapters.Lib
         public string Currency { get; set; } = null!;
 
         [BsonElement("categoryId")]
+        [BsonRepresentation(BsonType.String)]
         [JsonPropertyName("categoryId")]
         public Guid CategoryId { get; set; }
 
         [BsonElement("providerId")]
+        [BsonRepresentation(BsonType.String)]
         [JsonPropertyName("providerId")]
         public Guid ProviderId { get; set; }