diff --git a/polkadot/runtime/kusama/src/lib.rs b/polkadot/runtime/kusama/src/lib.rs
index d5b118824e..bb62b50299 100644
--- a/polkadot/runtime/kusama/src/lib.rs
+++ b/polkadot/runtime/kusama/src/lib.rs
@@ -55,6 +55,7 @@ use sp_staking::SessionIndex;
 use frame_support::{
 	parameter_types, construct_runtime, debug,
 	traits::{KeyOwnerProofSystem, SplitTwoWays, Randomness, LockIdentifier},
+  weights::RuntimeDbWeight,
 };
 use im_online::sr25519::AuthorityId as ImOnlineId;
 use authority_discovery_primitives::AuthorityId as AuthorityDiscoveryId;
@@ -131,6 +132,13 @@ parameter_types! {
 	pub const Version: RuntimeVersion = VERSION;
 }
 
+parameter_types! {
+	pub const DbWeight: RuntimeDbWeight = RuntimeDbWeight {
+		read: 60_000_000,
+		write: 200_000_000,
+	};
+}
+
 impl system::Trait for Runtime {
 	type Origin = Origin;
 	type Call = Call;
@@ -144,7 +152,7 @@ impl system::Trait for Runtime {
 	type Event = Event;
 	type BlockHashCount = BlockHashCount;
 	type MaximumBlockWeight = MaximumBlockWeight;
-	type DbWeight = ();
+	type DbWeight = DbWeight;
 	type BlockExecutionWeight = BlockExecutionWeight;
 	type ExtrinsicBaseWeight = ExtrinsicBaseWeight;
 	type MaximumBlockLength = MaximumBlockLength;
diff --git a/polkadot/runtime/polkadot/src/lib.rs b/polkadot/runtime/polkadot/src/lib.rs
index 8cfdebf1e9..4765809975 100644
--- a/polkadot/runtime/polkadot/src/lib.rs
+++ b/polkadot/runtime/polkadot/src/lib.rs
@@ -57,6 +57,7 @@ use sp_staking::SessionIndex;
 use frame_support::{
 	parameter_types, construct_runtime, debug,
 	traits::{KeyOwnerProofSystem, SplitTwoWays, Randomness, LockIdentifier},
+  weights::RuntimeDbWeight,
 };
 use im_online::sr25519::AuthorityId as ImOnlineId;
 use authority_discovery_primitives::AuthorityId as AuthorityDiscoveryId;
@@ -137,6 +138,13 @@ parameter_types! {
 	pub const Version: RuntimeVersion = VERSION;
 }
 
+parameter_types! {
+	pub const DbWeight: RuntimeDbWeight = RuntimeDbWeight {
+		read: 60_000_000,
+		write: 200_000_000,
+	};
+}
+
 impl system::Trait for Runtime {
 	type Origin = Origin;
 	type Call = Call;
@@ -150,7 +158,7 @@ impl system::Trait for Runtime {
 	type Event = Event;
 	type BlockHashCount = BlockHashCount;
 	type MaximumBlockWeight = MaximumBlockWeight;
-	type DbWeight = ();
+	type DbWeight = DbWeight;
 	type BlockExecutionWeight = BlockExecutionWeight;
 	type ExtrinsicBaseWeight = ExtrinsicBaseWeight;
 	type MaximumBlockLength = MaximumBlockLength;
diff --git a/polkadot/runtime/westend/src/lib.rs b/polkadot/runtime/westend/src/lib.rs
index 92ca41fed5..62680bb7b4 100644
--- a/polkadot/runtime/westend/src/lib.rs
+++ b/polkadot/runtime/westend/src/lib.rs
@@ -55,6 +55,7 @@ use sp_staking::SessionIndex;
 use frame_support::{
 	parameter_types, construct_runtime, debug,
 	traits::{KeyOwnerProofSystem, Randomness},
+	weights::RuntimeDbWeight,
 };
 use im_online::sr25519::AuthorityId as ImOnlineId;
 use authority_discovery_primitives::AuthorityId as AuthorityDiscoveryId;
@@ -131,6 +132,13 @@ parameter_types! {
 	pub const Version: RuntimeVersion = VERSION;
 }
 
+parameter_types! {
+	pub const DbWeight: RuntimeDbWeight = RuntimeDbWeight {
+		read: 60_000_000,
+		write: 200_000_000,
+	};
+}
+
 impl system::Trait for Runtime {
 	type Origin = Origin;
 	type Call = Call;
@@ -144,8 +152,8 @@ impl system::Trait for Runtime {
 	type Event = Event;
 	type BlockHashCount = BlockHashCount;
 	type MaximumBlockWeight = MaximumBlockWeight;
-	type DbWeight = ();
-	type BlockExecutionWeight = BlockExecutionWeight;
+	type DbWeight = DbWeight;
+  type BlockExecutionWeight = BlockExecutionWeight;
 	type ExtrinsicBaseWeight = ExtrinsicBaseWeight;
 	type MaximumBlockLength = MaximumBlockLength;
 	type AvailableBlockRatio = AvailableBlockRatio;