diff --git a/src/TgBotLib/Enums/Methods.php b/src/TgBotLib/Enums/Methods.php
index a7596be..f9b6698 100644
--- a/src/TgBotLib/Enums/Methods.php
+++ b/src/TgBotLib/Enums/Methods.php
@@ -103,6 +103,7 @@
     use TgBotLib\Methods\SetStickerEmojiList;
     use TgBotLib\Methods\SetStickerMaskPosition;
     use TgBotLib\Methods\SetStickerPositionInSet;
+    use TgBotLib\Methods\SetStickerSetThumbnail;
     use TgBotLib\Methods\SetStickerSetTitle;
     use TgBotLib\Methods\SetWebhook;
     use TgBotLib\Methods\StopMessageLiveLocation;
@@ -228,6 +229,7 @@
         case SET_STICKER_EMOJI_LIST = 'setStickerEmojiList';
         case SET_STICKER_MASK_POSITION = 'setStickerMaskPosition';
         case SET_STICKER_SET_TITLE = 'setStickerSetTitle';
+        case SET_STICKER_SET_THUMBNAIL = 'setStickerSetThumbnail';
 
         /**
          * Executes a command on the provided bot with the given parameters.
@@ -351,6 +353,7 @@
                 self::SET_STICKER_EMOJI_LIST => SetStickerEmojiList::execute($bot, $parameters),
                 self::SET_STICKER_MASK_POSITION => SetStickerMaskPosition::execute($bot, $parameters),
                 self::SET_STICKER_SET_TITLE => SetStickerSetTitle::execute($bot, $parameters),
+                self::SET_STICKER_SET_THUMBNAIL => SetStickerSetThumbnail::execute($bot, $parameters),
             };
         }
     }
diff --git a/src/TgBotLib/Methods/SetStickerSetThumbnail.php b/src/TgBotLib/Methods/SetStickerSetThumbnail.php
new file mode 100644
index 0000000..905bd16
--- /dev/null
+++ b/src/TgBotLib/Methods/SetStickerSetThumbnail.php
@@ -0,0 +1,54 @@
+<?php
+
+    namespace TgBotLib\Methods;
+
+    use TgBotLib\Abstracts\Method;
+    use TgBotLib\Bot;
+    use TgBotLib\Enums\Methods;
+    use TgBotLib\Objects\Message;
+
+    class SetStickerSetThumbnail extends Method
+    {
+
+        /**
+         * @inheritDoc
+         */
+        public static function execute(Bot $bot, array $parameters = []): true
+        {
+            // Handle different thumbnail input types
+            if (isset($parameters['thumbnail']))
+            {
+                $thumbnail = $parameters['thumbnail'];
+
+                // If thumbnail is a file path and exists locally
+                if (is_string($thumbnail) && file_exists($thumbnail) && is_file($thumbnail))
+                {
+                    return (bool)self::executeCurl(self::buildUpload($bot, Methods::SET_STICKER_SET_THUMBNAIL->value, 'thumbnail', $thumbnail, array_diff_key($parameters, ['thumbnail' => null])));
+                }
+            }
+
+            return (bool)self::executeCurl(self::buildPost($bot, Methods::SET_STICKER_SET_THUMBNAIL->value, $parameters));
+        }
+
+        /**
+         * @inheritDoc
+         */
+        public static function getRequiredParameters(): ?array
+        {
+            return [
+                'name',
+                'user_id',
+                'format'
+            ];
+        }
+
+        /**
+         * @inheritDoc
+         */
+        public static function getOptionalParameters(): ?array
+        {
+            return [
+                'thumbnail'
+            ];
+        }
+    }
\ No newline at end of file