diff --git a/structs.go b/structs.go
index 1c29a7e..64e077f 100644
--- a/structs.go
+++ b/structs.go
@@ -622,6 +622,7 @@ const (
 	StickerFormatTypePNG    StickerFormat = 1
 	StickerFormatTypeAPNG   StickerFormat = 2
 	StickerFormatTypeLottie StickerFormat = 3
+	StickerFormatTypeGIF    StickerFormat = 4
 )
 
 // StickerType is the type of sticker.