diff --git a/Src/Notion.Client/Api/Blocks/RequestParams/BlocksRetrieveChildrenParameters.cs b/Src/Notion.Client/Api/Blocks/RequestParams/BlocksRetrieveChildrenParameters.cs
index 52a2685f..ddc73a91 100644
--- a/Src/Notion.Client/Api/Blocks/RequestParams/BlocksRetrieveChildrenParameters.cs
+++ b/Src/Notion.Client/Api/Blocks/RequestParams/BlocksRetrieveChildrenParameters.cs
@@ -3,6 +3,6 @@
     public class BlocksRetrieveChildrenParameters : IBlocksRetrieveChildrenQueryParameters
     {
         public string StartCursor { get; set; }
-        public string PageSize { get; set; }
+        public int? PageSize { get; set; }
     }
 }
diff --git a/Src/Notion.Client/Api/Databases/DatabasesClient.cs b/Src/Notion.Client/Api/Databases/DatabasesClient.cs
index 5a7570c1..7f12bb62 100644
--- a/Src/Notion.Client/Api/Databases/DatabasesClient.cs
+++ b/Src/Notion.Client/Api/Databases/DatabasesClient.cs
@@ -25,7 +25,7 @@ public async Task<PaginatedList<Database>> ListAsync(DatabasesListParameters dat
             var queryParams = new Dictionary<string, string>()
             {
                 { "start_cursor", databasesListQueryParmaters?.StartCursor },
-                { "page_size", databasesListQueryParmaters?.PageSize }
+                { "page_size", databasesListQueryParmaters?.PageSize?.ToString() }
             };
 
             return await _client.GetAsync<PaginatedList<Database>>(DatabasesApiUrls.List(), queryParams);
diff --git a/Src/Notion.Client/Api/Databases/RequestParams/DatabasesListParameters.cs b/Src/Notion.Client/Api/Databases/RequestParams/DatabasesListParameters.cs
index 7300e11d..51136e47 100644
--- a/Src/Notion.Client/Api/Databases/RequestParams/DatabasesListParameters.cs
+++ b/Src/Notion.Client/Api/Databases/RequestParams/DatabasesListParameters.cs
@@ -3,6 +3,6 @@
     public class DatabasesListParameters : IDatabasesListQueryParmaters
     {
         public string StartCursor { get; set; }
-        public string PageSize { get; set; }
+        public int? PageSize { get; set; }
     }
 }
diff --git a/Src/Notion.Client/Api/Databases/RequestParams/DatabasesQueryParameters.cs b/Src/Notion.Client/Api/Databases/RequestParams/DatabasesQueryParameters.cs
index 973fcaa6..454961a2 100644
--- a/Src/Notion.Client/Api/Databases/RequestParams/DatabasesQueryParameters.cs
+++ b/Src/Notion.Client/Api/Databases/RequestParams/DatabasesQueryParameters.cs
@@ -7,6 +7,6 @@ public class DatabasesQueryParameters : IDatabaseQueryBodyParameters
         public Filter Filter { get; set; }
         public List<Sort> Sorts { get; set; }
         public string StartCursor { get; set; }
-        public string PageSize { get; set; }
+        public int? PageSize { get; set; }
     }
 }
diff --git a/Src/Notion.Client/Api/Search/Parameters/SearchParameters.cs b/Src/Notion.Client/Api/Search/Parameters/SearchParameters.cs
index a933f1e8..ae02c0f4 100644
--- a/Src/Notion.Client/Api/Search/Parameters/SearchParameters.cs
+++ b/Src/Notion.Client/Api/Search/Parameters/SearchParameters.cs
@@ -6,6 +6,6 @@ public class SearchParameters : ISearchBodyParameters
         public SearchSort Sort { get; set; }
         public SearchFilter Filter { get; set; }
         public string StartCursor { get; set; }
-        public string PageSize { get; set; }
+        public int? PageSize { get; set; }
     }
 }
diff --git a/Src/Notion.Client/Models/PaginatedList.cs b/Src/Notion.Client/Models/PaginatedList.cs
index 53360afe..05881b26 100644
--- a/Src/Notion.Client/Models/PaginatedList.cs
+++ b/Src/Notion.Client/Models/PaginatedList.cs
@@ -9,7 +9,7 @@ public interface IPaginationParameters
         string StartCursor { get; set; }
 
         [JsonProperty("page_size")]
-        string PageSize { get; set; }
+        int? PageSize { get; set; }
     }
 
     public class PaginatedList<T>