diff --git a/runtime/moonbase/src/lib.rs b/runtime/moonbase/src/lib.rs
index 6ca2ff7b240..7839ed512d0 100644
--- a/runtime/moonbase/src/lib.rs
+++ b/runtime/moonbase/src/lib.rs
@@ -118,7 +118,7 @@ pub mod currency {
 	pub const UNIT: Balance = 1_000_000_000_000_000_000;
 	pub const KILOUNIT: Balance = 1_000_000_000_000_000_000_000;
 
-	pub const TRANSACTION_BYTE_FEE: Balance = 10 * MICROUNIT * SUPPLY_FACTOR;
+	pub const TRANSACTION_BYTE_FEE: Balance = 1 * GIGAWEI * SUPPLY_FACTOR; // TODO: review
 	pub const STORAGE_BYTE_FEE: Balance = 100 * MICROUNIT * SUPPLY_FACTOR;
 	pub const WEIGHT_FEE: Balance = 50 * KILOWEI * SUPPLY_FACTOR;
 
@@ -327,11 +327,32 @@ impl WeightToFeePolynomial for WeightToFee {
 	}
 }
 
+pub struct LengthToFee;
+impl WeightToFeePolynomial for LengthToFee {
+	type Balance = Balance;
+
+	fn polynomial() -> WeightToFeeCoefficients<Self::Balance> {
+		smallvec![
+			WeightToFeeCoefficients {
+				degree: 1,
+				coeff_frac: Perbill::zero(),
+				coeff_integer: currency::TRANSACTION_BYTE_FEE,
+				negative: false,
+			},
+			WeightToFeeCoefficients {
+				degree: 3,
+				coeff_frac: Perbill::zero(),
+				coeff_integer: 1,
+				negative: false,
+			},
+	}
+};
+
 impl pallet_transaction_payment::Config for Runtime {
 	type OnChargeTransaction = CurrencyAdapter<Balances, DealWithFees<Runtime>>;
-	type TransactionByteFee = TransactionByteFee;
 	type OperationalFeeMultiplier = OperationalFeeMultiplier;
 	type WeightToFee = IdentityFee<Balance>;
+	type LengthToFee = LengthToFee;
 	type FeeMultiplierUpdate = SlowAdjustingFeeUpdate<Runtime>;
 }
 
diff --git a/runtime/moonbeam/src/lib.rs b/runtime/moonbeam/src/lib.rs
index 21f8f5f5850..3bdd53fee22 100644
--- a/runtime/moonbeam/src/lib.rs
+++ b/runtime/moonbeam/src/lib.rs
@@ -39,7 +39,7 @@ use frame_support::{
 	},
 	weights::{
 		constants::{RocksDbWeight, WEIGHT_PER_SECOND},
-		DispatchClass, GetDispatchInfo, IdentityFee, Weight,
+		DispatchClass, GetDispatchInfo, IdentityFee, ConstantModifierFee, Weight,
 	},
 	PalletId,
 };
@@ -304,9 +304,9 @@ parameter_types! {
 
 impl pallet_transaction_payment::Config for Runtime {
 	type OnChargeTransaction = CurrencyAdapter<Balances, DealWithFees<Runtime>>;
-	type TransactionByteFee = TransactionByteFee;
 	type OperationalFeeMultiplier = OperationalFeeMultiplier;
 	type WeightToFee = IdentityFee<Balance>;
+	type LengthToFee = ConstantModifierFee<Balance, TransactionByteFee>;
 	type FeeMultiplierUpdate = SlowAdjustingFeeUpdate<Runtime>;
 }
 
diff --git a/runtime/moonriver/src/lib.rs b/runtime/moonriver/src/lib.rs
index 8420624313d..383491544a4 100644
--- a/runtime/moonriver/src/lib.rs
+++ b/runtime/moonriver/src/lib.rs
@@ -39,7 +39,7 @@ use frame_support::{
 	},
 	weights::{
 		constants::{RocksDbWeight, WEIGHT_PER_SECOND},
-		DispatchClass, GetDispatchInfo, IdentityFee, Weight, WeightToFeeCoefficient,
+		DispatchClass, GetDispatchInfo, IdentityFee, ConstantModifierFee, Weight, WeightToFeeCoefficient,
 		WeightToFeeCoefficients, WeightToFeePolynomial,
 	},
 	PalletId,
@@ -325,9 +325,9 @@ impl WeightToFeePolynomial for WeightToFee {
 
 impl pallet_transaction_payment::Config for Runtime {
 	type OnChargeTransaction = CurrencyAdapter<Balances, DealWithFees<Runtime>>;
-	type TransactionByteFee = TransactionByteFee;
 	type OperationalFeeMultiplier = OperationalFeeMultiplier;
 	type WeightToFee = IdentityFee<Balance>;
+	type LengthToFee = ConstantModifierFee<Balance, TransactionByteFee>;
 	type FeeMultiplierUpdate = SlowAdjustingFeeUpdate<Runtime>;
 }