diff --git a/CHANGELOG.md b/CHANGELOG.md
index c2174381db..93e0bc469e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## 0.21.0 TelegramBotAPI 4.5
 
+* Now any administrator object instance have `customTitle` nullable field
 * Added the new request `SetChatAdministratorCustomTitle` to manage the custom titles of administrators promoted by the
 bot.
 * Added the field `slowModeDelay` to the `ExtendedSupergroupChat` objects.
diff --git a/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/AdministratorChatMemberImpl.kt b/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/AdministratorChatMemberImpl.kt
index 168b61ff8f..23662f990e 100644
--- a/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/AdministratorChatMemberImpl.kt
+++ b/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/AdministratorChatMemberImpl.kt
@@ -13,5 +13,6 @@ data class AdministratorChatMemberImpl(
     override val canInviteUsers: Boolean,
     override val canRestrictMembers: Boolean,
     override val canPinMessages: Boolean,
-    override val canPromoteMembers: Boolean
+    override val canPromoteMembers: Boolean,
+    override val customTitle: String?
 ) : AdministratorChatMember
diff --git a/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/CreatorChatMember.kt b/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/CreatorChatMember.kt
index b00de59489..d92d84b2d8 100644
--- a/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/CreatorChatMember.kt
+++ b/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/CreatorChatMember.kt
@@ -3,8 +3,10 @@ package com.github.insanusmokrassar.TelegramBotAPI.types.ChatMember
 import com.github.insanusmokrassar.TelegramBotAPI.types.ChatMember.abstracts.AdministratorChatMember
 import com.github.insanusmokrassar.TelegramBotAPI.types.User
 
-data class CreatorChatMember(override val user: User) :
-    AdministratorChatMember {
+data class CreatorChatMember(
+    override val user: User,
+    override val customTitle: String?
+) : AdministratorChatMember {
     override val canBeEdited: Boolean = true
     override val canChangeInfo: Boolean = true
     override val canPostMessages: Boolean = true
diff --git a/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/RawChatMember.kt b/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/RawChatMember.kt
index 278f851e73..ac40748e8a 100644
--- a/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/RawChatMember.kt
+++ b/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/RawChatMember.kt
@@ -39,11 +39,13 @@ internal data class RawChatMember(
     @SerialName(canSendOtherMessagesField)
     private val canSendOtherMessages: Boolean = false,
     @SerialName(canAddWebPagePreviewsField)
-    private val canAddWebPagePreviews: Boolean = false
+    private val canAddWebPagePreviews: Boolean = false,
+    @SerialName(customTitleField)
+    private val customTitle: String? = null
 ) {
     val asChatMember: ChatMember by lazy {
         when (status) {
-            "creator" -> CreatorChatMember(user)
+            "creator" -> CreatorChatMember(user, customTitle)
             "administrator" -> AdministratorChatMemberImpl(
                 user,
                 canBeEdited,
@@ -54,7 +56,8 @@ internal data class RawChatMember(
                 canInviteUsers,
                 canRestrictMembers,
                 canPinMessages,
-                canPromoteMembers
+                canPromoteMembers,
+                customTitle
             )
             "member" -> MemberChatMember(user)
             "restricted" -> RestrictedChatMember(
diff --git a/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/abstracts/AdministratorChatMember.kt b/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/abstracts/AdministratorChatMember.kt
index 27bc3e5842..f99ce2ef25 100644
--- a/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/abstracts/AdministratorChatMember.kt
+++ b/src/commonMain/kotlin/com/github/insanusmokrassar/TelegramBotAPI/types/ChatMember/abstracts/AdministratorChatMember.kt
@@ -7,4 +7,5 @@ interface AdministratorChatMember : SpecialRightsChatMember {
     val canRemoveMessages: Boolean
     val canRestrictMembers: Boolean
     val canPromoteMembers: Boolean
+    val customTitle: String?
 }
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