diff --git a/driver/txlist_decompressor/txlist_decompressor.go b/driver/txlist_decompressor/txlist_decompressor.go
index 9018af0ac..a26edc1d9 100644
--- a/driver/txlist_decompressor/txlist_decompressor.go
+++ b/driver/txlist_decompressor/txlist_decompressor.go
@@ -6,6 +6,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/rlp"
+
 	"github.com/taikoxyz/taiko-client/internal/utils"
 )
 
diff --git a/driver/txlist_decompressor/txlist_decompressor_test.go b/driver/txlist_decompressor/txlist_decompressor_test.go
index a816b9e5f..a2d676f10 100644
--- a/driver/txlist_decompressor/txlist_decompressor_test.go
+++ b/driver/txlist_decompressor/txlist_decompressor_test.go
@@ -13,6 +13,7 @@ import (
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/stretchr/testify/require"
+
 	"github.com/taikoxyz/taiko-client/internal/utils"
 )
 
diff --git a/prover/config.go b/prover/config.go
index 7d24e5615..ddc1cc096 100644
--- a/prover/config.go
+++ b/prover/config.go
@@ -102,7 +102,7 @@ func NewConfigFromCliContext(c *cli.Context) (*Config, error) {
 	}
 
 	// If we are running a guardian prover, we need to prove unassigned blocks and run in contester mode by default.
-	if c.IsSet(flags.GuardianProverMajority.Name) && c.IsSet(flags.GuardianProverMinority.Name) {
+	if c.IsSet(flags.GuardianProverMajority.Name) {
 		if err := c.Set(flags.ProveUnassignedBlocks.Name, "true"); err != nil {
 			return nil, err
 		}
@@ -120,8 +120,7 @@ func NewConfigFromCliContext(c *cli.Context) (*Config, error) {
 	}
 
 	// If we are not running a guardian prover, a raiko host endpoint is required.
-	if (!c.IsSet(flags.GuardianProverMajority.Name) || !c.IsSet(flags.GuardianProverMinority.Name)) &&
-		!c.IsSet(flags.RaikoHostEndpoint.Name) {
+	if !c.IsSet(flags.GuardianProverMajority.Name) && !c.IsSet(flags.RaikoHostEndpoint.Name) {
 		return nil, errors.New("raiko host not provided")
 	}
 
diff --git a/prover/proof_submitter/transaction/builder.go b/prover/proof_submitter/transaction/builder.go
index 4a79e7b52..0a069f97c 100644
--- a/prover/proof_submitter/transaction/builder.go
+++ b/prover/proof_submitter/transaction/builder.go
@@ -2,6 +2,7 @@ package transaction
 
 import (
 	"errors"
+	"fmt"
 	"math/big"
 
 	"github.com/ethereum-optimism/optimism/op-service/txmgr"
@@ -16,6 +17,7 @@ import (
 
 var (
 	ErrUnretryableSubmission = errors.New("unretryable submission error")
+	ZeroAddress              common.Address
 )
 
 // TxBuilder will build a transaction with the given nonce.
@@ -78,8 +80,10 @@ func (a *ProveBlockTxBuilder) Build(
 		} else {
 			if tier > encoding.TierGuardianMinorityID {
 				to = a.majorityGuardianProverAddress
-			} else {
+			} else if tier == encoding.TierGuardianMinorityID && a.minorityGuardianProverAddress != ZeroAddress {
 				to = a.minorityGuardianProverAddress
+			} else {
+				return nil, fmt.Errorf("tier %d need set minorityGuardianProverAddress", tier)
 			}
 			if data, err = encoding.GuardianProverABI.Pack("approve", *meta, *transition, *tierProof); err != nil {
 				if isSubmitProofTxErrorRetryable(err, blockID) {
diff --git a/prover/prover.go b/prover/prover.go
index aabe3f00e..e9797713c 100644
--- a/prover/prover.go
+++ b/prover/prover.go
@@ -199,8 +199,10 @@ func InitFromConfig(ctx context.Context, p *Prover, cfg *Config) (err error) {
 			return fmt.Errorf("failed to get MinGuardians from majority guardian prover contract: %w", err)
 		}
 
-		if _, err := p.rpc.MinorityGuardianProver.MinGuardians(&bind.CallOpts{Context: ctx}); err != nil {
-			return fmt.Errorf("failed to get MinGuardians from minority guardian prover contract: %w", err)
+		if p.rpc.MinorityGuardianProver != nil {
+			if _, err := p.rpc.MinorityGuardianProver.MinGuardians(&bind.CallOpts{Context: ctx}); err != nil {
+				return fmt.Errorf("failed to get MinGuardians from minority guardian prover contract: %w", err)
+			}
 		}
 
 		p.guardianProverHeartbeater = guardianProverHeartbeater.New(
@@ -469,8 +471,7 @@ func (p *Prover) getSubmitterByTier(tier uint16) proofSubmitter.Submitter {
 
 // IsGuardianProver returns true if the current prover is a guardian prover.
 func (p *Prover) IsGuardianProver() bool {
-	return p.cfg.GuardianProverMajorityAddress != common.Address{} &&
-		p.cfg.GuardianProverMinorityAddress != common.Address{}
+	return p.cfg.GuardianProverMajorityAddress != common.Address{}
 }
 
 // ProverAddress returns the current prover account address.