diff --git a/blockchain.go b/blockchain.go
index fa68abc..bbcb976 100644
--- a/blockchain.go
+++ b/blockchain.go
@@ -168,7 +168,7 @@ func (bc *Blockchain) Iterator() *BlockchainIterator {
 }
 
 // MineBlock mines a new block with the provided transactions
-func (bc *Blockchain) MineBlock(transactions []*Transaction) {
+func (bc *Blockchain) MineBlock(transactions []*Transaction) *Block {
 	var lastHash []byte
 
 	for _, tx := range transactions {
@@ -208,6 +208,8 @@ func (bc *Blockchain) MineBlock(transactions []*Transaction) {
 	if err != nil {
 		log.Panic(err)
 	}
+
+	return newBlock
 }
 
 // SignTransaction signs inputs of a Transaction
diff --git a/cli_send.go b/cli_send.go
index 3528611..456c264 100644
--- a/cli_send.go
+++ b/cli_send.go
@@ -21,6 +21,7 @@ func (cli *CLI) send(from, to string, amount int) {
 	cbTx := NewCoinbaseTX(from, "")
 	txs := []*Transaction{cbTx, tx}
 
-	bc.MineBlock(txs)
+	newBlock := bc.MineBlock(txs)
+	UTXOSet.Update(newBlock)
 	fmt.Println("Success!")
 }