diff --git a/CHANGELOG b/CHANGELOG
index 2fc4b9f088..0f9684c9f8 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -29,3 +29,4 @@
     * VideoNote
     * Voice
 * `MessageContent` now is `ResendableContent`
+* Now all media sending factories which contains `thumb` have default `null` value
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendAnimation.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendAnimation.kt
index fd1c63db37..993fc8e2a7 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendAnimation.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendAnimation.kt
@@ -14,7 +14,7 @@ import kotlinx.serialization.*
 fun SendAnimation(
     chatId: ChatIdentifier,
     animation: InputFile,
-    thumb: InputFile?,
+    thumb: InputFile? = null,
     caption: String? = null,
     parseMode: ParseMode? = null,
     duration: Long? = null,
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendAudio.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendAudio.kt
index 0032486080..653621b317 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendAudio.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendAudio.kt
@@ -14,7 +14,7 @@ import kotlinx.serialization.*
 fun SendAudio(
     chatId: ChatIdentifier,
     audio: InputFile,
-    thumb: InputFile?,
+    thumb: InputFile? = null,
     caption: String? = null,
     parseMode: ParseMode? = null,
     duration: Long? = null,
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendDocument.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendDocument.kt
index f1c2121d54..05f22cc523 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendDocument.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendDocument.kt
@@ -14,7 +14,7 @@ import kotlinx.serialization.*
 fun SendDocument(
     chatId: ChatIdentifier,
     document: InputFile,
-    thumb: InputFile?,
+    thumb: InputFile? = null,
     caption: String? = null,
     parseMode: ParseMode? = null,
     disableNotification: Boolean = false,
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendVideo.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendVideo.kt
index be97b694cd..cdacb0f009 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendVideo.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendVideo.kt
@@ -14,7 +14,7 @@ import kotlinx.serialization.*
 fun SendVideo(
     chatId: ChatIdentifier,
     video: InputFile,
-    thumb: InputFile?,
+    thumb: InputFile? = null,
     caption: String? = null,
     parseMode: ParseMode? = null,
     duration: Long? = null,
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendVideoNote.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendVideoNote.kt
index 8bba6e8009..3bedeec3c1 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendVideoNote.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendVideoNote.kt
@@ -14,7 +14,7 @@ import kotlinx.serialization.*
 fun SendVideoNote(
     chatId: ChatIdentifier,
     videoNote: InputFile,
-    thumb: InputFile?,
+    thumb: InputFile? = null,
     caption: String? = null,
     parseMode: ParseMode? = null,
     duration: Long? = null,
diff --git a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendVoice.kt b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendVoice.kt
index af42ed09e5..2db410591b 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendVoice.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/requests/send/media/SendVoice.kt
@@ -14,7 +14,7 @@ import kotlinx.serialization.*
 fun SendVoice(
     chatId: ChatIdentifier,
     voice: InputFile,
-    thumb: InputFile?,
+    thumb: InputFile? = null,
     caption: String? = null,
     parseMode: ParseMode? = null,
     duration: Long? = null,