diff --git a/CustomBot/src/main/kotlin/CustomBot.kt b/CustomBot/src/main/kotlin/CustomBot.kt
index ad4453c..6cf9334 100644
--- a/CustomBot/src/main/kotlin/CustomBot.kt
+++ b/CustomBot/src/main/kotlin/CustomBot.kt
@@ -5,15 +5,22 @@ import dev.inmo.kslog.common.setDefaultKSLog
 import dev.inmo.micro_utils.coroutines.subscribeSafelyWithoutExceptions
 import dev.inmo.tgbotapi.extensions.api.bot.getMe
 import dev.inmo.tgbotapi.extensions.behaviour_builder.BehaviourContextData
+import dev.inmo.tgbotapi.extensions.behaviour_builder.buildSubcontextInitialAction
 import dev.inmo.tgbotapi.extensions.behaviour_builder.telegramBotWithBehaviourAndLongPolling
 import dev.inmo.tgbotapi.extensions.behaviour_builder.triggers_handling.onCommand
+import dev.inmo.tgbotapi.types.message.abstracts.CommonMessage
+import dev.inmo.tgbotapi.types.update.abstracts.Update
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 
-private var BehaviourContextData.update
-    get() = get("update")
+private var BehaviourContextData.update: Update?
+    get() = get("update") as? Update
     set(value) = set("update", value)
 
+private var BehaviourContextData.commonMessage: CommonMessage<*>?
+    get() = get("commonMessage") as? CommonMessage<*>
+    set(value) = set("commonMessage", value)
+
 /**
  * This place can be the playground for your code.
  */
@@ -45,8 +52,10 @@ suspend fun main(vararg args: String) {
                 }
             }
         },
-        subcontextInitialAction = {
-            data.update = it
+        subcontextInitialAction = buildSubcontextInitialAction {
+            add {
+                data.update = it
+            }
         }
     ) {
         // start here!!
@@ -55,6 +64,17 @@ suspend fun main(vararg args: String) {
 
         onCommand("start") {
             println(data.update)
+            println(data.commonMessage)
+        }
+
+        onCommand(
+            "additional_command",
+            additionalSubcontextInitialAction = { update, commonMessage ->
+                data.commonMessage = commonMessage
+            }
+        ) {
+            println(data.update)
+            println(data.commonMessage)
         }
 
         allUpdatesFlow.subscribeSafelyWithoutExceptions(this) {
diff --git a/gradle.properties b/gradle.properties
index 905b493..f25d386 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,7 +6,7 @@ kotlin.daemon.jvmargs=-Xmx3g -Xms500m
 
 
 kotlin_version=2.0.21
-telegram_bot_api_version=20.1.0
+telegram_bot_api_version=21.0.0
 micro_utils_version=0.23.0
 serialization_version=1.7.3
 ktor_version=3.0.1