diff --git a/command/genesis/polybft_params.go b/command/genesis/polybft_params.go
index f8a52c800d..44919807be 100644
--- a/command/genesis/polybft_params.go
+++ b/command/genesis/polybft_params.go
@@ -133,6 +133,7 @@ func (p *genesisParams) generatePolyBftChainConfig(o command.OutputFormatter) er
 		Governance:          initialValidators[0].Address,
 		InitialTrieRoot:     types.StringToHash(p.initialStateRoot),
 		NativeTokenConfig:   p.nativeTokenConfig,
+		MinValidatorSetSize: p.minNumValidators,
 		MaxValidatorSetSize: p.maxNumValidators,
 		RewardConfig: &polybft.RewardsConfig{
 			TokenAddress:  rewardTokenAddr,
diff --git a/consensus/polybft/polybft_config.go b/consensus/polybft/polybft_config.go
index 84f7629aaa..b7b2e424d8 100644
--- a/consensus/polybft/polybft_config.go
+++ b/consensus/polybft/polybft_config.go
@@ -43,6 +43,9 @@ type PolyBFTConfig struct {
 	// SupernetID indicates ID of given supernet generated by stake manager contract
 	SupernetID int64 `json:"supernetID"`
 
+	// MinValidatorSetSize indicates the minimum size of validator set
+	MinValidatorSetSize uint64 `json:"minValidatorSetSize"`
+
 	// MaxValidatorSetSize indicates the maximum size of validator set
 	MaxValidatorSetSize uint64 `json:"maxValidatorSetSize"`