diff --git a/consensus/ubqhash/algorithm.go b/consensus/ubqhash/algorithm.go
index 9141e1d159..61f4f7889d 100644
--- a/consensus/ubqhash/algorithm.go
+++ b/consensus/ubqhash/algorithm.go
@@ -31,6 +31,8 @@ import (
 	"github.com/ubiq/go-ubiq/common/bitutil"
 	"github.com/ubiq/go-ubiq/crypto"
 	"github.com/ubiq/go-ubiq/log"
+
+	"golang.org/x/crypto/blake2b"
 	"golang.org/x/crypto/sha3"
 )