diff --git a/blockchain.go b/blockchain.go
index 8436035..535a130 100644
--- a/blockchain.go
+++ b/blockchain.go
@@ -82,7 +82,7 @@ func NewBlockchain(nodeID string) *Blockchain {
 		log.Panic(err)
 	}
 
-	err = db.Update(func(tx *bolt.Tx) error {
+	err = db.View(func(tx *bolt.Tx) error {
 		b := tx.Bucket([]byte(blocksBucket))
 		tip = b.Get([]byte("l"))