diff --git a/CHANGELOG.md b/CHANGELOG.md
index c5d6b4862a..1555b1efa0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,8 @@
     * Added `Update#sourceUser` method
     * More types assumed as sent by user types now implements `FromUser` interface
     * Added `Any#whenFromUser`, `Any#asFromUser` and`Any#requireFromUser` extensions
+    * `MedaGroupUpdate` and its direct extenders `SentMediaGroupUpdate` and `EditMediaGroupUpdate` became
+      `sealed interface`s
 * `Behaviour Builder`:
     * ❗️ All triggers (`on*` extensions) have been modified to work in parallel by some marker by default (new parameter
       `markerFactory`, in most cases will work async for different chats)
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/update/MediaGroupUpdates/MediaGroupUpdate.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/update/MediaGroupUpdates/MediaGroupUpdate.kt
index b50e772ba7..740d7fab8e 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/update/MediaGroupUpdates/MediaGroupUpdate.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/update/MediaGroupUpdates/MediaGroupUpdate.kt
@@ -11,14 +11,14 @@ import dev.inmo.tgbotapi.types.update.abstracts.*
  * @see dev.inmo.tgbotapi.extensions.api.SetWebhookKt.includeWebhookInRoute
  * @see dev.inmo.tgbotapi.extensions.api.updates.UpdatesPollingKt.startGettingOfUpdates
  */
-interface MediaGroupUpdate : Update
+sealed interface MediaGroupUpdate : Update
 
-interface SentMediaGroupUpdate: MediaGroupUpdate {
+sealed interface SentMediaGroupUpdate: MediaGroupUpdate {
     override val data: List<MediaGroupMessage<MediaGroupContent>>
     val origins: List<BaseMessageUpdate>
 }
 
-interface EditMediaGroupUpdate : BaseEditMessageUpdate, MediaGroupUpdate {
+sealed interface EditMediaGroupUpdate : BaseEditMessageUpdate, MediaGroupUpdate {
     override val data: MediaGroupMessage<MediaGroupContent>
     val origin: BaseMessageUpdate
 }
diff --git a/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/UpdateChatRetriever.kt b/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/UpdateChatRetriever.kt
index 49493e952f..bff841b0ef 100644
--- a/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/UpdateChatRetriever.kt
+++ b/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/UpdateChatRetriever.kt
@@ -17,7 +17,6 @@ fun Update.sourceChat(): Chat? = when (this) {
     is MediaGroupUpdate -> when (this) {
         is SentMediaGroupUpdate -> data.chat
         is EditMediaGroupUpdate -> data.chat
-        else -> null
     }
     is BaseMessageUpdate -> data.chat
     is InlineQueryUpdate -> data.from