diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20119d562a..a49e7c4a3d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -58,6 +58,7 @@
                 * `CommonGroupMessage` - just common message
             * `PrivateMessage` - works like previous `CommonMessageImpl`
             * Previous `CommonMessageImpl` safely renamed to `PrivateMessageImpl`
+    * New property `PromoteChatMember#isAnonymous`
 * `API`:
     * Extensions `TelegramBot#pinChatMessage` now support any `Chat` and `Message`s from any `Chat`
     * New extensions `TelegramBot#unpinAllChatMessages`
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/chat/members/PromoteChatMember.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/chat/members/PromoteChatMember.kt
index 0489a54374..b878b0cd6a 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/chat/members/PromoteChatMember.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/chat/members/PromoteChatMember.kt
@@ -14,6 +14,8 @@ data class PromoteChatMember(
     override val userId: UserId,
     @SerialName(untilDateField)
     override val untilDate: TelegramDate? = null,
+    @SerialName(isAnonymousField)
+    private val isAnonymous: Boolean? = null,
     @SerialName(canChangeInfoField)
     private val canChangeInfo: Boolean? = null,
     @SerialName(canPostMessagesField)