diff --git a/app/app.go b/app/app.go
index 2371d4f8..0dc928fb 100644
--- a/app/app.go
+++ b/app/app.go
@@ -57,7 +57,6 @@ import (
 	v8 "github.com/classic-terra/core/v3/app/upgrades/v8"
 	v8_1 "github.com/classic-terra/core/v3/app/upgrades/v8_1"
 	v8_2 "github.com/classic-terra/core/v3/app/upgrades/v8_2"
-	v9 "github.com/classic-terra/core/v3/app/upgrades/v9"
 	v9_1 "github.com/classic-terra/core/v3/app/upgrades/v9_1"
 
 	customante "github.com/classic-terra/core/v3/custom/auth/ante"
@@ -90,7 +89,6 @@ var (
 		v7_1.Upgrade,
 		v8.Upgrade,
 		v8_1.Upgrade,
-		v9.Upgrade,
 		v8_2.Upgrade,
 		v9_1.Upgrade,
 	}
diff --git a/app/upgrades/v9/constants.go b/app/upgrades/v9/constants.go
deleted file mode 100644
index 8bca8b61..00000000
--- a/app/upgrades/v9/constants.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package v9
-
-import (
-	"github.com/classic-terra/core/v3/app/upgrades"
-	store "github.com/cosmos/cosmos-sdk/store/types"
-
-	tax2gastypes "github.com/classic-terra/core/v3/x/tax2gas/types"
-)
-
-const UpgradeName = "v9"
-
-var Upgrade = upgrades.Upgrade{
-	UpgradeName:          UpgradeName,
-	CreateUpgradeHandler: CreateV9UpgradeHandler,
-	StoreUpgrades: store.StoreUpgrades{
-		Added: []string{
-			tax2gastypes.ModuleName,
-		},
-	},
-}
diff --git a/app/upgrades/v9/upgrades.go b/app/upgrades/v9/upgrades.go
deleted file mode 100644
index fb67fa7d..00000000
--- a/app/upgrades/v9/upgrades.go
+++ /dev/null
@@ -1,31 +0,0 @@
-package v9
-
-import (
-	"github.com/classic-terra/core/v3/app/keepers"
-	"github.com/classic-terra/core/v3/app/upgrades"
-	tax2gastypes "github.com/classic-terra/core/v3/x/tax2gas/types"
-	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/cosmos/cosmos-sdk/types/module"
-	upgradetypes "github.com/cosmos/cosmos-sdk/x/upgrade/types"
-)
-
-func CreateV9UpgradeHandler(
-	mm *module.Manager,
-	cfg module.Configurator,
-	_ upgrades.BaseAppParamManager,
-	keepers *keepers.AppKeepers,
-) upgradetypes.UpgradeHandler {
-	return func(ctx sdk.Context, _ upgradetypes.Plan, fromVM module.VersionMap) (module.VersionMap, error) {
-		// set default oracle split
-		keepers.TreasuryKeeper.SetTaxRate(ctx, sdk.ZeroDec())
-
-		tax2gasParams := tax2gastypes.DefaultParams()
-		tax2gasParams.GasPrices = sdk.NewDecCoins(
-			sdk.NewDecCoinFromDec("uluna", sdk.NewDecWithPrec(28325, 3)),
-			sdk.NewDecCoinFromDec("uusd", sdk.NewDecWithPrec(75, 2)),
-		)
-		tax2gasParams.MaxTotalBypassMinFeeMsgGasUsage = 200000
-		keepers.Tax2gasKeeper.SetParams(ctx, tax2gasParams)
-		return mm.RunMigrations(ctx, cfg, fromVM)
-	}
-}
diff --git a/app/upgrades/v9_1/constants.go b/app/upgrades/v9_1/constants.go
index 6b887852..3b5ca487 100644
--- a/app/upgrades/v9_1/constants.go
+++ b/app/upgrades/v9_1/constants.go
@@ -2,6 +2,9 @@ package v91
 
 import (
 	"github.com/classic-terra/core/v3/app/upgrades"
+	store "github.com/cosmos/cosmos-sdk/store/types"
+
+	tax2gastypes "github.com/classic-terra/core/v3/x/tax2gas/types"
 )
 
 const UpgradeName = "v9_1"
@@ -9,4 +12,9 @@ const UpgradeName = "v9_1"
 var Upgrade = upgrades.Upgrade{
 	UpgradeName:          UpgradeName,
 	CreateUpgradeHandler: CreateV91UpgradeHandler,
+	StoreUpgrades: store.StoreUpgrades{
+		Added: []string{
+			tax2gastypes.ModuleName,
+		},
+	},
 }
diff --git a/x/tax2gas/types/keys.go b/x/tax2gas/types/keys.go
index ef679c3a..588980e9 100644
--- a/x/tax2gas/types/keys.go
+++ b/x/tax2gas/types/keys.go
@@ -1,7 +1,7 @@
 package types
 
 const (
-	ModuleName = "tax2gas"
+	ModuleName = "tax2gas_testnet"
 
 	StoreKey = ModuleName