diff --git a/build.gradle b/build.gradle
index 319391dab6..78c107f9c6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -40,3 +40,9 @@ dependencies {
     // Use JUnit test framework
     testImplementation 'junit:junit:4.12'
 }
+
+compileKotlin {
+    kotlinOptions {
+        freeCompilerArgs = [ disableImplicitReflectionSerializerAnnotation ]
+    }
+}
diff --git a/gradle.properties b/gradle.properties
index ca94a1211a..30d76e621e 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,3 +6,5 @@ joda_time_version=2.10.1
 ktor_version=1.1.2
 
 gradle_bintray_plugin_version=1.8.4
+
+disableImplicitReflectionSerializerAnnotation=-Xexperimental=kotlinx.serialization.ImplicitReflectionSerializer
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/bot/Ktor/base/MultipartRequestCallFactory.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/bot/Ktor/base/MultipartRequestCallFactory.kt
index 80c2b5f8df..41d4f8be9e 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/bot/Ktor/base/MultipartRequestCallFactory.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/bot/Ktor/base/MultipartRequestCallFactory.kt
@@ -33,7 +33,7 @@ class MultipartRequestCallFactory : KtorCallFactory {
                         when (value) {
                             is MultipartFile -> append(
                                 key,
-                                value.file.inputStream().asInput(),
+                                value.file.asInput(),
                                 Headers.build {
                                     append(HttpHeaders.ContentType, value.mimeType)
                                     append(HttpHeaders.ContentDisposition, "filename=${value.fileId}")
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/abstracts/InputFile.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/abstracts/InputFile.kt
index 5488db6c0b..fcc7c627ba 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/abstracts/InputFile.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/abstracts/InputFile.kt
@@ -1,5 +1,6 @@
 package com.github.insanusmokrassar.TelegramBotAPI.requests.abstracts
 
+import com.github.insanusmokrassar.TelegramBotAPI.utils.StorageFile
 import kotlinx.serialization.*
 import java.io.File
 import java.nio.file.Files
@@ -30,16 +31,15 @@ object FileIdSerializer : KSerializer<FileId> {
 /**
  * Contains info about file for sending
  */
+@Serializable
 data class MultipartFile (
-    val file: File,
-    val mimeType: String = Files.probeContentType(file.toPath()),
-    val filename: String = file.name
+    val file: StorageFile,
+    val mimeType: String = file.contentType,
+    val filename: String = file.fileName
 ) : InputFile() {
-    override val fileId: String by lazy {
-        "${UUID.randomUUID()}.${file.extension}"
-    }
+    override val fileId: String = file.generateCustomName()
 }
 
 fun File.toInputFile(): InputFile = MultipartFile(
-    this
+    StorageFile(this)
 )
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InlineQueries/InputMessageContentSerializer.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InlineQueries/InputMessageContentSerializer.kt
new file mode 100644
index 0000000000..2114cea456
--- /dev/null
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InlineQueries/InputMessageContentSerializer.kt
@@ -0,0 +1,20 @@
+package com.github.insanusmokrassar.TelegramBotAPI.types.InlineQueries
+
+import com.github.insanusmokrassar.TelegramBotAPI.types.InlineQueries.InputMessageContent.*
+import com.github.insanusmokrassar.TelegramBotAPI.types.InlineQueries.abstracts.InputMessageContent
+import kotlinx.serialization.*
+
+@Serializer(InputMessageContent::class)
+object InputMessageContentSerializer : KSerializer<InputMessageContent> {
+    override fun serialize(encoder: Encoder, obj: InputMessageContent) {
+        when (obj) {
+            is InputContactMessageContent -> InputContactMessageContent.serializer().serialize(encoder, obj)
+            is InputLocationMessageContent -> InputLocationMessageContent.serializer().serialize(encoder, obj)
+            is InputTextMessageContent -> InputTextMessageContent.serializer().serialize(encoder, obj)
+            is InputVenueMessageContent -> InputVenueMessageContent.serializer().serialize(encoder, obj)
+            else -> throw IllegalArgumentException("Unknown for serializing InputContactMessageContent")
+        }
+    }
+
+    override fun deserialize(decoder: Decoder): InputMessageContent = throw IllegalStateException("Object can't be deserialized")
+}
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InlineQueries/abstracts/InputMessageContent.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InlineQueries/abstracts/InputMessageContent.kt
index f36cbb3a20..4b7ad7902a 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InlineQueries/abstracts/InputMessageContent.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InlineQueries/abstracts/InputMessageContent.kt
@@ -1,3 +1,7 @@
 package com.github.insanusmokrassar.TelegramBotAPI.types.InlineQueries.abstracts
 
+import com.github.insanusmokrassar.TelegramBotAPI.types.InlineQueries.InputMessageContentSerializer
+import kotlinx.serialization.Serializable
+
+@Serializable(InputMessageContentSerializer::class)
 interface InputMessageContent
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InputMedia/InputMedia.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InputMedia/InputMedia.kt
index 03388e0ba5..41ec671ded 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InputMedia/InputMedia.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InputMedia/InputMedia.kt
@@ -1,9 +1,11 @@
 package com.github.insanusmokrassar.TelegramBotAPI.types.InputMedia
 
 import com.github.insanusmokrassar.TelegramBotAPI.requests.abstracts.InputFile
+import kotlinx.serialization.Serializable
 
 const val inputMediaFileAttachmentNameTemplate = "attach://%s"
 
+@Serializable(InputMediaSerializer::class)
 interface InputMedia {
     val type: String
     val file: InputFile
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InputMedia/InputMediaSerializer.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InputMedia/InputMediaSerializer.kt
new file mode 100644
index 0000000000..f63bad756b
--- /dev/null
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/InputMedia/InputMediaSerializer.kt
@@ -0,0 +1,21 @@
+package com.github.insanusmokrassar.TelegramBotAPI.types.InputMedia
+
+import kotlinx.serialization.*
+
+@Serializer(InputMedia::class)
+object InputMediaSerializer : KSerializer<InputMedia> {
+    override fun serialize(encoder: Encoder, obj: InputMedia) {
+        when (obj) {
+            is InputMediaVideo -> InputMediaVideo.serializer().serialize(encoder, obj)
+            is InputMediaAudio -> InputMediaAudio.serializer().serialize(encoder, obj)
+            is InputMediaPhoto -> InputMediaPhoto.serializer().serialize(encoder, obj)
+            is InputMediaAnimation -> InputMediaAnimation.serializer().serialize(encoder, obj)
+            is InputMediaDocument -> InputMediaDocument.serializer().serialize(encoder, obj)
+            else -> throw IllegalArgumentException("Can't perform and serialize $obj")
+        }
+    }
+
+    override fun deserialize(decoder: Decoder): InputMedia {
+        throw IllegalStateException("Object can't be deserialized")
+    }
+}
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/buttons/InlineKeyboardMarkup.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/buttons/InlineKeyboardMarkup.kt
index 7c5e9e590e..39c5bea691 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/buttons/InlineKeyboardMarkup.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/buttons/InlineKeyboardMarkup.kt
@@ -1,11 +1,16 @@
 package com.github.insanusmokrassar.TelegramBotAPI.types.buttons
 
 import com.github.insanusmokrassar.TelegramBotAPI.types.buttons.InlineKeyboardButtons.InlineKeyboardButton
-import kotlinx.serialization.SerialName
-import kotlinx.serialization.Serializable
+import kotlinx.serialization.*
+import kotlinx.serialization.internal.ArrayListSerializer
 
 @Serializable
 data class InlineKeyboardMarkup(
     @SerialName("inline_keyboard")
+    @Serializable(with = KeyboardSerializer::class)
     val keyboard: Matrix<InlineKeyboardButton>
 ) : KeyboardMarkup
+
+object KeyboardSerializer : KSerializer<Matrix<InlineKeyboardButton>> by ArrayListSerializer(
+    ArrayListSerializer(ContextSerializer(InlineKeyboardButton::class))
+)
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/buttons/KeyboardMarkup.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/buttons/KeyboardMarkup.kt
index 09629a51be..a8702a797a 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/buttons/KeyboardMarkup.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/buttons/KeyboardMarkup.kt
@@ -1,3 +1,6 @@
 package com.github.insanusmokrassar.TelegramBotAPI.types.buttons
 
+import kotlinx.serialization.Serializable
+
+@Serializable(KeyboardMarkupSerializer::class)
 interface KeyboardMarkup
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/buttons/KeyboardMarkupSerializer.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/buttons/KeyboardMarkupSerializer.kt
new file mode 100644
index 0000000000..97de7e2ef1
--- /dev/null
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/buttons/KeyboardMarkupSerializer.kt
@@ -0,0 +1,15 @@
+package com.github.insanusmokrassar.TelegramBotAPI.types.buttons
+
+import kotlinx.serialization.*
+
+@Serializer(KeyboardMarkup::class)
+object KeyboardMarkupSerializer : KSerializer<KeyboardMarkup> {
+    override fun serialize(encoder: Encoder, obj: KeyboardMarkup) {
+        when(obj) {
+            is ForceReply -> ForceReply.serializer().serialize(encoder, obj)
+            is InlineKeyboardMarkup -> InlineKeyboardMarkup.serializer().serialize(encoder, obj)
+            is ReplyKeyboardMarkup -> ReplyKeyboardMarkup.serializer().serialize(encoder, obj)
+            is ReplyKeyboardRemove -> ReplyKeyboardRemove.serializer().serialize(encoder, obj)
+        }
+    }
+}
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/utils/StorageFile.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/utils/StorageFile.kt
new file mode 100644
index 0000000000..4173370af3
--- /dev/null
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/utils/StorageFile.kt
@@ -0,0 +1,20 @@
+package com.github.insanusmokrassar.TelegramBotAPI.utils
+
+import kotlinx.io.core.Input
+import kotlinx.io.streams.asInput
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.Transient
+import java.io.File
+import java.nio.file.Files
+import java.util.*
+
+@Serializable
+data class StorageFile(
+    @Transient
+    private val file: File = throw IllegalStateException("Can't create object without file")
+) {
+    val contentType: String = Files.probeContentType(file.toPath())
+    val fileName: String = file.name
+    fun generateCustomName(): String = "${UUID.randomUUID()}.${file.extension}"
+    fun asInput(): Input = Files.newInputStream(file.toPath()).asInput()
+}