diff --git a/Sources/Telegrammer/Bot/Models/MaskPosition.swift b/Sources/Telegrammer/Bot/Models/MaskPosition.swift
index 69d2eaa..ed940c8 100644
--- a/Sources/Telegrammer/Bot/Models/MaskPosition.swift
+++ b/Sources/Telegrammer/Bot/Models/MaskPosition.swift
@@ -7,7 +7,7 @@
  SeeAlso Telegram Bot API Reference:
  [MaskPosition](https://core.telegram.org/bots/api#maskposition)
  */
-public final class MaskPosition: Codable {
+public final class MaskPosition: Codable, MultipartPartNestedConvertible {
 
     /// Custom keys for coding/decoding `MaskPosition` struct
     enum CodingKeys: String, CodingKey {
diff --git a/Sources/Telegrammer/Helpers/MultipartPartConvertible+Helper.swift b/Sources/Telegrammer/Helpers/MultipartPartConvertible+Helper.swift
new file mode 100644
index 0000000..b303a9a
--- /dev/null
+++ b/Sources/Telegrammer/Helpers/MultipartPartConvertible+Helper.swift
@@ -0,0 +1,28 @@
+//
+//  MultipartPartConvertible+Helper.swift
+//  Telegrammer
+//
+//  Created by Givi on 11/03/2019.
+//
+
+import Foundation
+import Multipart
+
+public protocol MultipartPartNestedConvertible: MultipartPartConvertible {}
+
+public extension MultipartPartNestedConvertible where Self: Codable {
+    func convertToMultipartPart() throws -> MultipartPart {
+        return try MultipartPart(data: JSONEncoder().encode(self))
+    }
+
+    static func convertFromMultipartPart(_ part: MultipartPart) throws -> Self {
+        do {
+            return try JSONDecoder().decode(self.self, from: part.data)
+        } catch {
+            throw MultipartError(
+                identifier: "\(self.self)",
+                reason: "Failed to setup instance from json decoder - \(error)"
+            )
+        }
+    }
+}
diff --git a/Sources/Telegrammer/Types/ReplyMarkup.swift b/Sources/Telegrammer/Types/ReplyMarkup.swift
index 2ae3745..5bd1fe6 100644
--- a/Sources/Telegrammer/Types/ReplyMarkup.swift
+++ b/Sources/Telegrammer/Types/ReplyMarkup.swift
@@ -10,7 +10,7 @@
  SeeAlso Telegram Bot API Reference:
  [Reply Markups](https://core.telegram.org/bots/2-0-intro#new-inline-keyboards)
  */
-public enum ReplyMarkup: Codable {
+public enum ReplyMarkup: Codable, MultipartPartNestedConvertible {
 	case inlineKeyboardMarkup(InlineKeyboardMarkup)
 	case replyKeyboardMarkup(ReplyKeyboardMarkup)
 	case replyKeyboardRemove(ReplyKeyboardRemove)