diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1402f894ec..48349c6ce7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## 28.0.1
 
+* `Core`:
+  * Let all `OptionallyMessageThreadRequest` inheritors to use `@EncodeDefault` annotation to fix default value passing
+
 ## 28.0.0
 
 **THIS UPDATE CONTAINS BREAKING CHANGES**
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/ForwardMessage.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/ForwardMessage.kt
index e8b0d99219..07d3e15e5e 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/ForwardMessage.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/ForwardMessage.kt
@@ -20,7 +20,9 @@ data class ForwardMessage(
     val toChatId: ChatIdentifier,
     @SerialName(messageIdField)
     override val messageId: MessageId,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = toChatId.threadId,
     @SerialName(videoStartTimestampField)
     override val startTimestamp: Seconds? = null,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/ForwardMessages.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/ForwardMessages.kt
index 10379b47f3..1fe8468ab0 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/ForwardMessages.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/ForwardMessages.kt
@@ -35,7 +35,9 @@ data class ForwardMessages (
     val fromChatId: ChatIdentifier,
     @SerialName(messageIdsField)
     override val messageIds: List<MessageId>,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = toChatId.threadId,
     @SerialName(disableNotificationField)
     override val disableNotification: Boolean = false,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/CopyMessage.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/CopyMessage.kt
index b7ba7fa756..08de47d2c5 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/CopyMessage.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/CopyMessage.kt
@@ -160,7 +160,9 @@ data class CopyMessage internal constructor(
     private val rawEntities: List<RawMessageEntity>? = null,
     @SerialName(showCaptionAboveMediaField)
     override val showCaptionAboveMedia: Boolean = false,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = toChatId.threadId,
     @SerialName(videoStartTimestampField)
     override val startTimestamp: Seconds? = null,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/CopyMessages.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/CopyMessages.kt
index 5837642af6..583d6f9849 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/CopyMessages.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/CopyMessages.kt
@@ -40,7 +40,9 @@ data class CopyMessages (
     val fromChatId: ChatIdentifier,
     @SerialName(messageIdsField)
     override val messageIds: List<MessageId>,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = toChatId.threadId,
     @SerialName(disableNotificationField)
     override val disableNotification: Boolean = false,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendAction.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendAction.kt
index 2e8a00cd1f..19885769df 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendAction.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendAction.kt
@@ -18,7 +18,9 @@ data class SendAction(
     override val chatId: ChatIdentifier,
     @SerialName(actionField)
     val action: BotAction,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendContact.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendContact.kt
index 291609e6ef..b0df05f9ca 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendContact.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendContact.kt
@@ -24,7 +24,9 @@ data class SendContact(
     val firstName: String,
     @SerialName(lastNameField)
     val lastName: String? = null,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendDice.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendDice.kt
index 232d7eeafa..36cb2818a3 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendDice.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendDice.kt
@@ -23,7 +23,9 @@ data class SendDice(
     override val chatId: ChatIdentifier,
     @SerialName(emojiField)
     val animationType: DiceAnimationType? = null,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendLocation.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendLocation.kt
index 8c33684455..27e9e06fe5 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendLocation.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendLocation.kt
@@ -139,8 +139,8 @@ sealed interface SendLocation<T : LocationContent> : SendContentMessageRequest<C
         override val heading: Degrees? = null,
         @SerialName(proximityAlertRadiusField)
         override val proximityAlertRadius: Meters? = null,
-        @SerialName(messageThreadIdField)
         @OptIn(ExperimentalSerializationApi::class)
+        @SerialName(messageThreadIdField)
         @EncodeDefault
         override val threadId: MessageThreadId? = chatId.threadId,
         @SerialName(businessConnectionIdField)
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendMessage.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendMessage.kt
index bd1e93ae33..5cbe80490b 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendMessage.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendMessage.kt
@@ -89,7 +89,9 @@ data class SendTextMessage internal constructor(
     override val parseMode: ParseMode? = null,
     @SerialName(entitiesField)
     private val rawEntities: List<RawMessageEntity>? = null,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendVenue.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendVenue.kt
index b384524f9a..c9214d11d0 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendVenue.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/SendVenue.kt
@@ -33,7 +33,9 @@ data class SendVenue(
     val googlePlaceId: GooglePlaceId? = null,
     @SerialName(googlePlaceTypeField)
     val googlePlaceType: GooglePlaceType? = null,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/games/SendGame.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/games/SendGame.kt
index 78e8625a02..373bc39549 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/games/SendGame.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/games/SendGame.kt
@@ -20,7 +20,9 @@ data class SendGame (
     override val chatId: ChatIdentifier,
     @SerialName(gameShortNameField)
     val gameShortName: String,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendAnimation.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendAnimation.kt
index 6c0bbe7b50..39fccac774 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendAnimation.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendAnimation.kt
@@ -160,7 +160,9 @@ data class SendAnimationData internal constructor(
     override val width: Int? = null,
     @SerialName(heightField)
     override val height: Int? = null,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendAudio.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendAudio.kt
index be6f0124f0..3d5c316bab 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendAudio.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendAudio.kt
@@ -149,7 +149,9 @@ data class SendAudioData internal constructor(
     override val performer: String? = null,
     @SerialName(titleField)
     override val title: String? = null,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendDocument.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendDocument.kt
index f49f4240ec..52bce97b7c 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendDocument.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendDocument.kt
@@ -161,7 +161,9 @@ data class SendDocumentData internal constructor(
     override val parseMode: ParseMode? = null,
     @SerialName(captionEntitiesField)
     private val rawEntities: List<RawMessageEntity>? = null,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendMediaGroup.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendMediaGroup.kt
index eac0638b3c..af4eb7b57a 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendMediaGroup.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendMediaGroup.kt
@@ -191,7 +191,9 @@ data class SendMediaGroupData internal constructor(
     @SerialName(chatIdField)
     override val chatId: ChatIdentifier,
     val media: List<MediaGroupMemberTelegramMedia> = emptyList(),
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendPaidMedia.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendPaidMedia.kt
index 2db109bd21..9e3139e398 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendPaidMedia.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendPaidMedia.kt
@@ -167,7 +167,9 @@ data class SendPaidMediaData internal constructor(
     val payload: PaidMediaPayload? = null,
     @SerialName(showCaptionAboveMediaField)
     override val showCaptionAboveMedia: Boolean = false,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendPhoto.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendPhoto.kt
index d4b7842607..8d105cfd7a 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendPhoto.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendPhoto.kt
@@ -128,7 +128,9 @@ data class SendPhotoData internal constructor(
     override val showCaptionAboveMedia: Boolean = false,
     @SerialName(hasSpoilerField)
     override val spoilered: Boolean = false,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendSticker.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendSticker.kt
index 8d97ba2a54..badb30cb0d 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendSticker.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendSticker.kt
@@ -58,7 +58,9 @@ data class SendStickerByFileId internal constructor(
     override val chatId: ChatIdentifier,
     @SerialName(stickerField)
     val sticker: InputFile,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendVideo.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendVideo.kt
index 40df7df3a5..6d1ca19c78 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendVideo.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendVideo.kt
@@ -181,7 +181,9 @@ data class SendVideoData internal constructor(
     override val height: Int? = null,
     @SerialName(supportStreamingField)
     val supportStreaming: Boolean? = null,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendVideoNote.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendVideoNote.kt
index f88bedadcc..546626e393 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendVideoNote.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendVideoNote.kt
@@ -74,7 +74,9 @@ data class SendVideoNoteData internal constructor(
     override val duration: Long? = null,
     @SerialName(lengthField)
     override val width: Int? = null,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendVoice.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendVoice.kt
index 68f3e8bd2a..340c9d8cd9 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendVoice.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/media/SendVoice.kt
@@ -126,7 +126,9 @@ data class SendVoiceData internal constructor(
     private val rawEntities: List<RawMessageEntity>? = null,
     @SerialName(durationField)
     override val duration: Long? = null,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/payments/SendInvoice.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/payments/SendInvoice.kt
index ea3697c4f1..79c1a9b162 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/payments/SendInvoice.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/payments/SendInvoice.kt
@@ -13,6 +13,7 @@ import dev.inmo.tgbotapi.types.payments.LabeledPrice
 import dev.inmo.tgbotapi.types.payments.LabeledPricesSerializer
 import dev.inmo.tgbotapi.types.payments.abstracts.Currency
 import dev.inmo.tgbotapi.types.payments.abstracts.XTR
+import dev.inmo.tgbotapi.types.threadId
 import kotlinx.serialization.*
 
 private val invoiceMessageSerializer: DeserializationStrategy<ContentMessage<InvoiceContent>>
@@ -61,7 +62,9 @@ data class SendInvoice(
     override val shouldSendEmailToProvider: Boolean = false,
     @SerialName(priceDependOnShipAddressField)
     override val priceDependOnShipAddress: Boolean = false,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(disableNotificationField)
     override val disableNotification: Boolean = false,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/polls/SendQuizPoll.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/polls/SendQuizPoll.kt
index a9067f3c25..819a59e799 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/polls/SendQuizPoll.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/polls/SendQuizPoll.kt
@@ -13,6 +13,8 @@ import dev.inmo.tgbotapi.types.polls.ExactScheduledCloseInfo
 import dev.inmo.tgbotapi.types.polls.InputPollOption
 import dev.inmo.tgbotapi.types.polls.ScheduledCloseInfo
 import dev.inmo.tgbotapi.utils.extensions.makeSourceString
+import kotlinx.serialization.EncodeDefault
+import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.SerializationStrategy
@@ -46,7 +48,9 @@ class SendQuizPoll internal constructor(
     override val openPeriod: LongSeconds? = null,
     @SerialName(closeDateField)
     override val closeDate: LongSeconds? = null,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/polls/SendRegularPoll.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/polls/SendRegularPoll.kt
index ce0c770ce6..396145abc6 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/polls/SendRegularPoll.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/send/polls/SendRegularPoll.kt
@@ -15,6 +15,8 @@ import dev.inmo.tgbotapi.types.polls.ScheduledCloseInfo
 import dev.inmo.tgbotapi.utils.EntitiesBuilder
 import dev.inmo.tgbotapi.utils.EntitiesBuilderBody
 import dev.inmo.tgbotapi.utils.extensions.makeSourceString
+import kotlinx.serialization.EncodeDefault
+import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.SerializationStrategy
@@ -41,7 +43,9 @@ class SendRegularPoll private constructor(
     override val openPeriod: LongSeconds?= null,
     @SerialName(closeDateField)
     override val closeDate: LongSeconds? = null,
+    @OptIn(ExperimentalSerializationApi::class)
     @SerialName(messageThreadIdField)
+    @EncodeDefault
     override val threadId: MessageThreadId? = chatId.threadId,
     @SerialName(businessConnectionIdField)
     override val businessConnectionId: BusinessConnectionId? = chatId.businessConnectionId,