diff --git a/src/libs/Veryfi/Veryfi.SignRequest.cs b/src/libs/Veryfi/Veryfi.SignRequest.cs
index 877f453..d8bd0fd 100644
--- a/src/libs/Veryfi/Veryfi.SignRequest.cs
+++ b/src/libs/Veryfi/Veryfi.SignRequest.cs
@@ -46,17 +46,13 @@ private async Task SignRequestAsync(
                         var value = item.Value;
                         if (value == null) continue;
                         string stringValue;
-                        switch (key)
+                        if (value is JArray)
                         {
-                            case "categories":
-                                stringValue = string.Join(",", value);
-                                break;
-                            case "file_urls":
-                                stringValue = string.Join(",", value);
-                                break;
-                            default:
-                                stringValue = (string) value!;
-                                break;
+                            stringValue = string.Join(",", value);
+                        }
+                        else
+                        {
+                            stringValue = (string) value!;
                         }
                         arguments.Add(key, stringValue);
                     }
diff --git a/src/tests/Veryfi.IntegrationTests/DocumentsTests.cs b/src/tests/Veryfi.IntegrationTests/DocumentsTests.cs
index 922fb06..c8c2fd2 100644
--- a/src/tests/Veryfi.IntegrationTests/DocumentsTests.cs
+++ b/src/tests/Veryfi.IntegrationTests/DocumentsTests.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
@@ -245,12 +246,15 @@ public async Task ProcessBase64Test(string fileName)
             await BaseTests.ApiTestAsync(async (api, cancellationToken) =>
             {
                 string[] categories = { "Meals", "Fat" };
+                var tags = new List<string> { "TAG" };
+                
                 var documentResponse = await api.Documents2Async(
                     new DocumentPOSTJSONRequest
                     {
                         File_name = file.FileName,
                         File_data = Convert.ToBase64String(file.AsBytes()),
-                        Categories = categories
+                        Categories = categories,
+                        Tags = tags
                     },
                     cancellationToken);