diff --git a/Src/Notion.Client/Api/Search/Parameters/SearchSort.cs b/Src/Notion.Client/Api/Search/Parameters/SearchSort.cs
index 60cd7122..7e1189a6 100644
--- a/Src/Notion.Client/Api/Search/Parameters/SearchSort.cs
+++ b/Src/Notion.Client/Api/Search/Parameters/SearchSort.cs
@@ -8,7 +8,6 @@ public class SearchSort
     {
         public SearchDirection Direction { get; set; }
 
-        [JsonConverter(typeof(IsoDateTimeConverter))]
-        public DateTime Timestamp { get; set; }
+        public string Timestamp { get; set; }
     }
 }
diff --git a/Test/Notion.UnitTests/Notion.UnitTests.csproj b/Test/Notion.UnitTests/Notion.UnitTests.csproj
index d7525cb2..8b4c91e4 100644
--- a/Test/Notion.UnitTests/Notion.UnitTests.csproj
+++ b/Test/Notion.UnitTests/Notion.UnitTests.csproj
@@ -78,6 +78,9 @@
     <None Update="data\users\RetrieveUserResponse.json">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
+    <None Update="data\search\SearchResponse.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
   </ItemGroup>
 
 </Project>
diff --git a/Test/Notion.UnitTests/SearchClientTest.cs b/Test/Notion.UnitTests/SearchClientTest.cs
new file mode 100644
index 00000000..aa506572
--- /dev/null
+++ b/Test/Notion.UnitTests/SearchClientTest.cs
@@ -0,0 +1,71 @@
+using System;
+using System.IO;
+using System.Threading.Tasks;
+using FluentAssertions;
+using Notion.Client;
+using WireMock.ResponseBuilders;
+using Xunit;
+
+namespace Notion.UnitTests
+{
+    public class SearchClientTest : ApiTestBase
+    {
+        private readonly SearchClient _client;
+
+        public SearchClientTest()
+        {
+            _client = new SearchClient(new RestClient(ClientOptions));
+        }
+
+        [Fact]
+        public async Task Search()
+        {
+            // Arrange
+            var path = ApiEndpoints.SearchApiUrls.Search();
+            var jsonData = await File.ReadAllTextAsync("data/search/SearchResponse.json");
+
+            Server.Given(CreatePostRequestBuilder(path))
+                .RespondWith(
+                Response.Create()
+                    .WithStatusCode(200)
+                    .WithBody(jsonData)
+            );
+
+            SearchParameters searchParameters = new SearchParameters()
+            {
+                Query = "External tasks",
+                Sort = new SearchSort
+                {
+                    Direction = SearchDirection.Ascending,
+                    Timestamp = "last_edited_time"
+                }
+            };
+
+            // Act
+            var searchResult = await _client.SearchAsync(searchParameters);
+
+            // Assert
+            var results = searchResult.Results;
+
+            results.Should().SatisfyRespectively(
+                obj =>
+                {
+                    obj.Object.Should().Be(ObjectType.Database);
+
+                    var database = (Database)obj;
+                    database.Properties.Should().HaveCount(2);
+                },
+                obj =>
+                {
+                    obj.Object.Should().Be(ObjectType.Page);
+
+                    var page = (Page)obj;
+                    page.IsArchived.Should().BeFalse();
+                    page.Properties.Should().HaveCount(1);
+                    page.Parent.Should().BeAssignableTo<DatabaseParent>();
+                    ((DatabaseParent)page.Parent).DatabaseId.Should().Be("e6c6f8ff-c70e-4970-91ba-98f03e0d7fc6");
+                }
+            );
+        }
+    }
+}
diff --git a/Test/Notion.UnitTests/data/search/SearchResponse.json b/Test/Notion.UnitTests/data/search/SearchResponse.json
new file mode 100644
index 00000000..107adcb3
--- /dev/null
+++ b/Test/Notion.UnitTests/data/search/SearchResponse.json
@@ -0,0 +1,82 @@
+{
+  "has_more": false,
+  "next_cursor": null,
+  "object": "list",
+  "results": [
+    {
+      "created_time": "2021-04-22T22:23:26.080Z",
+      "id": "e6c6f8ff-c70e-4970-91ba-98f03e0d7fc6",
+      "last_edited_time": "2021-04-23T04:21:00.000Z",
+      "object": "database",
+      "properties": {
+        "Name": {
+          "id": "title",
+          "title": {},
+          "type": "title"
+        },
+        "Task Type": {
+          "id": "vd@l",
+          "multi_select": {
+            "options": []
+          },
+          "type": "multi_select"
+        }
+      },
+      "title": [
+        {
+          "annotations": {
+            "bold": false,
+            "code": false,
+            "color": "default",
+            "italic": false,
+            "strikethrough": false,
+            "underline": false
+          },
+          "href": null,
+          "plain_text": "Tasks",
+          "text": {
+            "content": "Tasks",
+            "link": null
+          },
+          "type": "text"
+        }
+      ]
+    },
+    {
+      "archived": false,
+      "created_time": "2021-04-23T04:21:00.000Z",
+      "id": "4f555b50-3a9b-49cb-924c-3746f4ca5522",
+      "last_edited_time": "2021-04-23T04:21:00.000Z",
+      "object": "page",
+      "parent": {
+        "database_id": "e6c6f8ff-c70e-4970-91ba-98f03e0d7fc6",
+        "type": "database_id"
+      },
+      "properties": {
+        "Name": {
+          "id": "title",
+          "title": [
+            {
+              "annotations": {
+                "bold": false,
+                "code": false,
+                "color": "default",
+                "italic": false,
+                "strikethrough": false,
+                "underline": false
+              },
+              "href": null,
+              "plain_text": "Task 1",
+              "text": {
+                "content": "Task1 1",
+                "link": null
+              },
+              "type": "text"
+            }
+          ],
+          "type": "title"
+        }
+      }
+    }
+  ]
+}