diff --git a/CHANGELOG.md b/CHANGELOG.md
index ccde68e942f..46c2f9268bd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -50,8 +50,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * [#8535](https://github.com/osmosis-labs/osmosis/pull/8535) Prevent Setting Invalid Before Send Hook
 * [#8310](https://github.com/osmosis-labs/osmosis/pull/8310) Taker fee share
 * [#8494](https://github.com/osmosis-labs/osmosis/pull/8494) Add additional events in x/lockup, x/superfluid, x/concentratedliquidity
-* [#8581](https://github.com/osmosis-labs/osmosis/pull/8581) Add ledger signing to smart account module
-* [#8573](https://github.com/osmosis-labs/osmosis/pull/8573) Increase unauthenticated gas to fix fee token issue
+* [#8581](https://github.com/osmosis-labs/osmosis/pull/8581) feat: add ledger signing to smart account module 
+* [#8573](https://github.com/osmosis-labs/osmosis/pull/8573) fix: increase unauthenticated gas to fix fee token issue
+* [#8598](https://github.com/osmosis-labs/osmosis/pull/8598) feat: param changes for block and cost per byte 
 * [#8609](https://github.com/osmosis-labs/osmosis/pull/8609) Exempt `UnrestrictedPoolCreatorWhitelist` addresses from pool creation fee
 
 ### Config
diff --git a/app/upgrades/v26/constants.go b/app/upgrades/v26/constants.go
index 63d7437030a..d14e031e06d 100644
--- a/app/upgrades/v26/constants.go
+++ b/app/upgrades/v26/constants.go
@@ -13,6 +13,15 @@ const (
 
 	// MaximumUnauthenticatedGas for smart account transactions to verify the fee payer
 	MaximumUnauthenticatedGas = uint64(250_000)
+
+	// BlockMaxBytes is the max bytes for a block, 3mb
+	BlockMaxBytes = int64(3000000)
+
+	// BlockMaxGas is the max gas allowed in a block
+	BlockMaxGas = int64(300000000)
+
+	// CostPerByte is the gas cost per byte
+	CostPerByte = uint64(30)
 )
 
 var Upgrade = upgrades.Upgrade{
diff --git a/app/upgrades/v26/upgrades.go b/app/upgrades/v26/upgrades.go
index 96ce9105239..ea0627c2f8c 100644
--- a/app/upgrades/v26/upgrades.go
+++ b/app/upgrades/v26/upgrades.go
@@ -6,6 +6,7 @@ import (
 	upgradetypes "cosmossdk.io/x/upgrade/types"
 	"github.com/cosmos/cosmos-sdk/types/module"
 
+	cmttypes "github.com/cometbft/cometbft/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 
 	"github.com/osmosis-labs/osmosis/v25/app/keepers"
@@ -60,6 +61,23 @@ func CreateUpgradeHandler(
 		authenticatorParams.MaximumUnauthenticatedGas = MaximumUnauthenticatedGas
 		keepers.SmartAccountKeeper.SetParams(ctx, authenticatorParams)
 
+		// Set the next block limits
+		defaultConsensusParams := cmttypes.DefaultConsensusParams().ToProto()
+		defaultConsensusParams.Block.MaxBytes = BlockMaxBytes // previously 5000000
+		defaultConsensusParams.Block.MaxGas = BlockMaxGas     // unchanged
+		err = keepers.ConsensusParamsKeeper.ParamsStore.Set(ctx, defaultConsensusParams)
+		if err != nil {
+			return nil, err
+		}
+
+		// Increase the tx size cost per byte to 30 to reduce the exploitability of bandwidth amplification problems.
+		accountParams := keepers.AccountKeeper.GetParams(ctx)
+		accountParams.TxSizeCostPerByte = CostPerByte // increase from 20 to 30
+		err = keepers.AccountKeeper.Params.Set(ctx, accountParams)
+		if err != nil {
+			return nil, err
+		}
+
 		return migrations, nil
 	}
 }
diff --git a/app/upgrades/v26/upgrades_test.go b/app/upgrades/v26/upgrades_test.go
index 8589446ee3b..80a475be3fb 100644
--- a/app/upgrades/v26/upgrades_test.go
+++ b/app/upgrades/v26/upgrades_test.go
@@ -4,6 +4,7 @@ import (
 	"testing"
 	"time"
 
+	cmttypes "github.com/cometbft/cometbft/types"
 	"github.com/stretchr/testify/suite"
 
 	"cosmossdk.io/core/appmodule"
@@ -49,6 +50,8 @@ func (s *UpgradeTestSuite) TestUpgrade() {
 
 	s.PrepareTradingPairTakerFeeTest()
 	s.PrepareIncreaseUnauthenticatedGasTest()
+	s.PrepareChangeBlockParamsTest()
+	s.PrepareCostPerByteTest()
 
 	// Run the upgrade
 	dummyUpgrade(s)
@@ -59,6 +62,8 @@ func (s *UpgradeTestSuite) TestUpgrade() {
 
 	s.ExecuteTradingPairTakerFeeTest()
 	s.ExecuteIncreaseUnauthenticatedGasTest()
+	s.ExecuteChangeBlockParamsTest()
+	s.ExecuteCostPerByteTest()
 }
 
 func dummyUpgrade(s *UpgradeTestSuite) {
@@ -115,3 +120,28 @@ func (s *UpgradeTestSuite) ExecuteIncreaseUnauthenticatedGasTest() {
 	authenticatorParams := s.App.SmartAccountKeeper.GetParams(s.Ctx)
 	s.Require().Equal(authenticatorParams.MaximumUnauthenticatedGas, v26.MaximumUnauthenticatedGas)
 }
+
+func (s *UpgradeTestSuite) PrepareChangeBlockParamsTest() {
+	defaultConsensusParams := cmttypes.DefaultConsensusParams().ToProto()
+	defaultConsensusParams.Block.MaxBytes = 1
+	defaultConsensusParams.Block.MaxGas = 1
+	s.App.ConsensusParamsKeeper.ParamsStore.Set(s.Ctx, defaultConsensusParams)
+}
+
+func (s *UpgradeTestSuite) ExecuteChangeBlockParamsTest() {
+	consParams, err := s.App.ConsensusParamsKeeper.ParamsStore.Get(s.Ctx)
+	s.Require().NoError(err)
+	s.Require().Equal(consParams.Block.MaxBytes, v26.BlockMaxBytes)
+	s.Require().Equal(consParams.Block.MaxGas, v26.BlockMaxGas)
+}
+
+func (s *UpgradeTestSuite) PrepareCostPerByteTest() {
+	accountParams := s.App.AccountKeeper.GetParams(s.Ctx)
+	accountParams.TxSizeCostPerByte = 0
+	s.App.AccountKeeper.Params.Set(s.Ctx, accountParams)
+}
+
+func (s *UpgradeTestSuite) ExecuteCostPerByteTest() {
+	accountParams := s.App.AccountKeeper.GetParams(s.Ctx)
+	s.Require().Equal(accountParams.TxSizeCostPerByte, v26.CostPerByte)
+}