diff --git a/consensus/istanbul/validator/weighted.go b/consensus/istanbul/validator/weighted.go
index 51e914bce7..73f21395f0 100644
--- a/consensus/istanbul/validator/weighted.go
+++ b/consensus/istanbul/validator/weighted.go
@@ -665,8 +665,13 @@ func (valSet *weightedCouncil) Refresh(hash common.Hash, blockNum uint64, config
 		return nil
 	}
 
-	totalStaking, _ := calcTotalAmount(weightedValidators, newStakingInfo, stakingAmounts)
-	calcWeight(weightedValidators, stakingAmounts, totalStaking)
+	// weight and gini were neutralized after Kore hard fork
+	if chainRules.IsKore {
+		setZeroWeight(weightedValidators)
+	} else {
+		totalStaking, _ := calcTotalAmount(weightedValidators, newStakingInfo, stakingAmounts)
+		calcWeight(weightedValidators, stakingAmounts, totalStaking)
+	}
 
 	valSet.refreshProposers(seed, blockNum)
 
@@ -822,6 +827,13 @@ func calcTotalAmount(weightedValidators []*weightedValidator, stakingInfo *rewar
 	return totalStaking, gini
 }
 
+// setZeroWeight makes each validator's weight to zero
+func setZeroWeight(weightedValidators []*weightedValidator) {
+	for _, weightedVal := range weightedValidators {
+		atomic.StoreUint64(&weightedVal.weight, 0)
+	}
+}
+
 // calcWeight updates each validator's weight based on the ratio of its staking amount vs. the total staking amount.
 func calcWeight(weightedValidators []*weightedValidator, stakingAmounts []float64, totalStaking float64) {
 	localLogger := logger.NewWith()