diff --git a/block.go b/block.go
index 6d8a074..07c1ef7 100644
--- a/block.go
+++ b/block.go
@@ -26,7 +26,7 @@ func (b *Block) SetHash() {
 
 // NewBlock creates and returns Block
 func NewBlock(data string, prevBlock []byte) *Block {
-	block := &Block{time.Now().Unix(), []byte(data), prevBlock, []byte("")}
+	block := &Block{time.Now().Unix(), []byte(data), prevBlock, []byte{}}
 	block.SetHash()
 	return block
 }