diff --git a/tgbotapi.core/build.gradle b/tgbotapi.core/build.gradle
index 9d12635f6c..f0b7bb9a2c 100644
--- a/tgbotapi.core/build.gradle
+++ b/tgbotapi.core/build.gradle
@@ -3,6 +3,7 @@ buildscript {
         mavenLocal()
         jcenter()
         mavenCentral()
+        maven { url "https://plugins.gradle.org/m2/" }
     }
 
     dependencies {
@@ -14,6 +15,7 @@ buildscript {
 plugins {
     id "org.jetbrains.kotlin.multiplatform"
     id "org.jetbrains.kotlin.plugin.serialization"
+    id "org.jetbrains.kotlin.kapt"
 }
 
 project.version = "$library_version"
@@ -26,6 +28,7 @@ repositories {
     jcenter()
     mavenCentral()
     maven { url "https://kotlin.bintray.com/kotlinx" }
+    maven { url 'https://jitpack.io' }
 }
 
 kotlin {
@@ -49,6 +52,7 @@ kotlin {
                 api "dev.inmo:micro_utils.coroutines:$micro_utils_version"
 
                 api "io.ktor:ktor-client-core:$ktor_version"
+                api "com.github.matfax.klassindex:library:4.+"
             }
         }
         commonTest {
@@ -90,3 +94,30 @@ kotlin {
         }
     }
 }
+
+dependencies {
+    kapt "com.github.matfax.klassindex:processor:4.+"
+}
+
+kapt {
+    useBuildCache = false
+    arguments {
+        arg(
+            "com.github.matfax.klassindex.IndexSubclasses",
+            "dev.inmo.tgbotapi.types.chat.abstracts.Chat",
+//            "dev.inmo.tgbotapi.types.message.abstracts.Message",
+//            "dev.inmo.tgbotapi.types.CallbackQuery.CallbackQuery",
+//            "dev.inmo.tgbotapi.types.buttons.KeyboardMarkup",
+//            "dev.inmo.tgbotapi.types.actions.BotAction",
+//            "dev.inmo.tgbotapi.types.buttons.InlineKeyboardButtons.InlineKeyboardButton",
+//            "dev.inmo.tgbotapi.types.ChatMember.abstracts.ChatMember",
+//            "dev.inmo.tgbotapi.types.files.abstracts.TelegramMediaFile",
+//            "dev.inmo.tgbotapi.types.InlineQueries.abstracts.InlineQuery",
+//            "dev.inmo.tgbotapi.types.InlineQueries.InlineQueryResult.abstracts.InlineQueryResult",
+//            "dev.inmo.tgbotapi.types.InlineQueries.abstracts.InputMessageContent",
+//            "dev.inmo.tgbotapi.types.InputMedia.InputMedia",
+//            "dev.inmo.tgbotapi.types.polls.Poll",
+//            "dev.inmo.tgbotapi.types.update.abstracts.Update"
+        )
+    }
+}