diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/Common.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/Common.kt
index 92db4eaa0a..9d9a3c8d66 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/Common.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/Common.kt
@@ -154,6 +154,7 @@ const val dropPendingUpdatesField = "drop_pending_updates"
 const val hasCustomCertificateField = "has_custom_certificate"
 const val pendingUpdateCountField = "pending_update_count"
 const val lastErrorDateField = "last_error_date"
+const val lastSynchronizationErrorDateField = "last_synchronization_error_date"
 const val lastErrorMessageField = "last_error_message"
 const val votesCountField = "voter_count"
 const val isClosedField = "is_closed"
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/WebhookInfo.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/WebhookInfo.kt
index 3596d56b12..f4b92e169f 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/WebhookInfo.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/WebhookInfo.kt
@@ -16,6 +16,8 @@ data class WebhookInfo(
     val allowedUpdates: List<String> = ALL_UPDATES_LIST,
     @SerialName(lastErrorDateField)
     val lastErrorDate: TelegramDate? = null,
+    @SerialName(lastSynchronizationErrorDateField)
+    val lastSynchronizationErrorDate: TelegramDate? = null,
     @SerialName(lastErrorMessageField)
     val lastErrorMessage: String? = null
 ) {