diff --git a/internal/configs/sharding/testnet.go b/internal/configs/sharding/testnet.go
index 682075afe..2fd7a4368 100644
--- a/internal/configs/sharding/testnet.go
+++ b/internal/configs/sharding/testnet.go
@@ -81,5 +81,5 @@ var testnetReshardingEpoch = []*big.Int{
 	params.TestnetChainConfig.StakingEpoch,
 }
 
-var testnetV0 = MustNewInstance(4, 20, 15, numeric.OneDec(), genesis.TNHarmonyAccounts, genesis.TNFoundationalAccounts, testnetReshardingEpoch, TestnetSchedule.BlocksPerEpoch())
+var testnetV0 = MustNewInstance(4, 16, 15, numeric.OneDec(), genesis.TNHarmonyAccounts, genesis.TNFoundationalAccounts, testnetReshardingEpoch, TestnetSchedule.BlocksPerEpoch())
 var testnetV1 = MustNewInstance(4, 20, 15, numeric.MustNewDecFromStr("0.90"), genesis.TNHarmonyAccounts, genesis.TNFoundationalAccounts, testnetReshardingEpoch, TestnetSchedule.BlocksPerEpoch())