diff --git a/hash/blake2b/blake2b.go b/hash/blake2b/blake2b.go
index b1128f7..e6adbb0 100644
--- a/hash/blake2b/blake2b.go
+++ b/hash/blake2b/blake2b.go
@@ -15,7 +15,7 @@ import (
 func hasherSelect(bitSize int) hash.Hash {
 	switch bitSize {
 	case 224:
-		hasher, _ := blake2b.New256(nil)
+		hasher, _ := blake2b.New(28, nil)
 		return hasher
 	case 256:
 		hasher, _ := blake2b.New256(nil)
@@ -114,4 +114,4 @@ func SumFileHex(file string, bitSize ...int) (string, error) {
 		return "", err
 	}
 	return hex.EncodeToString(hash), nil
-}
\ No newline at end of file
+}