diff --git a/blockchain/genesis/genesis.go b/blockchain/genesis/genesis.go
index f27c0833a3..9a57d864dd 100644
--- a/blockchain/genesis/genesis.go
+++ b/blockchain/genesis/genesis.go
@@ -62,7 +62,7 @@ func defaultConfig() Genesis {
 			FairbankBlockHeight:     5165641,
 			GreenlandBlockHeight:    6544441,
 			HawaiiBlockHeight:       11267641,
-			IcelandBlockHeight:      21267641,
+			IcelandBlockHeight:      12289321,
 		},
 		Account: Account{
 			InitBalanceMap: make(map[string]string),
diff --git a/blockchain/genesis/heightupgrade_test.go b/blockchain/genesis/heightupgrade_test.go
index 9bc5e54f4a..5f0133a17b 100644
--- a/blockchain/genesis/heightupgrade_test.go
+++ b/blockchain/genesis/heightupgrade_test.go
@@ -40,8 +40,8 @@ func TestNewHeightChange(t *testing.T) {
 	require.True(cfg.IsGreenland(uint64(6544441)))
 	require.False(cfg.IsHawaii(uint64(11267640)))
 	require.True(cfg.IsHawaii(uint64(11267641)))
-	require.False(cfg.IsIceland(uint64(21267640)))
-	require.True(cfg.IsIceland(uint64(21267641)))
+	require.False(cfg.IsIceland(uint64(12289320)))
+	require.True(cfg.IsIceland(uint64(12289321)))
 
 	require.Equal(cfg.PacificBlockHeight, uint64(432001))
 	require.Equal(cfg.AleutianBlockHeight, uint64(864001))
@@ -54,5 +54,5 @@ func TestNewHeightChange(t *testing.T) {
 	require.Equal(cfg.FbkMigrationBlockHeight, uint64(5157001))
 	require.Equal(cfg.GreenlandBlockHeight, uint64(6544441))
 	require.Equal(cfg.HawaiiBlockHeight, uint64(11267641))
-	require.Equal(cfg.IcelandBlockHeight, uint64(21267641))
+	require.Equal(cfg.IcelandBlockHeight, uint64(12289321))
 }