diff --git a/platformapi/dingdingapi/callback.go b/platformapi/dingdingapi/callback.go
index 8f7c29d2..8ae9137d 100644
--- a/platformapi/dingdingapi/callback.go
+++ b/platformapi/dingdingapi/callback.go
@@ -252,6 +252,7 @@ func (c *DingTalkCrypto) GetDecryptMsg(signature, timestamp, nonce, secretMsg st
 	}
 	blockMode := cipher.NewCBCDecrypter(c.Block, c.BKey[:c.Block.BlockSize()])
 	plantText := make([]byte, len(decode))
+
 	blockMode.CryptBlocks(plantText, decode)
 	plantText = pkCS7UnPadding(plantText)
 	size := binary.BigEndian.Uint32(plantText[16:20])