diff --git a/polkadot/runtime/kusama/src/lib.rs b/polkadot/runtime/kusama/src/lib.rs
index 39a532b475..0837d2caf1 100644
--- a/polkadot/runtime/kusama/src/lib.rs
+++ b/polkadot/runtime/kusama/src/lib.rs
@@ -1555,12 +1555,50 @@ pub type Executive = frame_executive::Executive<
 		TechnicalCommitteeStoragePrefixMigration,
 		TechnicalMembershipStoragePrefixMigration,
 		MigrateTipsPalletPrefix,
+		BountiesPrefixMigration,
 		StakingBagsListMigrationV8,
 	),
 >;
 /// The payload being signed in the transactions.
 pub type SignedPayload = generic::SignedPayload<Call, SignedExtra>;
 
+const BOUNTIES_OLD_PREFIX: &str = "Treasury";
+
+/// Migrate from 'Treasury' to the new prefix 'Bounties'
+pub struct BountiesPrefixMigration;
+
+impl OnRuntimeUpgrade for BountiesPrefixMigration {
+	fn on_runtime_upgrade() -> frame_support::weights::Weight {
+		use frame_support::traits::PalletInfo;
+		let name = <Runtime as frame_system::Config>::PalletInfo::name::<Bounties>()
+			.expect("Bounties is part of runtime, so it has a name; qed");
+		pallet_bounties::migrations::v4::migrate::<Runtime, Bounties, _>(BOUNTIES_OLD_PREFIX, name)
+	}
+	#[cfg(feature = "try-runtime")]
+	fn pre_upgrade() -> Result<(), &'static str> {
+		use frame_support::traits::PalletInfo;
+		let name = <Runtime as frame_system::Config>::PalletInfo::name::<Bounties>()
+			.expect("Bounties is part of runtime, so it has a name; qed");
+		pallet_bounties::migrations::v4::pre_migration::<Runtime, Bounties, _>(
+			BOUNTIES_OLD_PREFIX,
+			name,
+		);
+		Ok(())
+	}
+
+	#[cfg(feature = "try-runtime")]
+	fn post_upgrade() -> Result<(), &'static str> {
+		use frame_support::traits::PalletInfo;
+		let name = <Runtime as frame_system::Config>::PalletInfo::name::<Bounties>()
+			.expect("Bounties is part of runtime, so it has a name; qed");
+		pallet_bounties::migrations::v4::post_migration::<Runtime, Bounties, _>(
+			BOUNTIES_OLD_PREFIX,
+			name,
+		);
+		Ok(())
+	}
+}
+
 const COUNCIL_OLD_PREFIX: &str = "Instance1Collective";
 /// Migrate from `Instance1Collective` to the new pallet prefix `Council`
 pub struct CouncilStoragePrefixMigration;
diff --git a/polkadot/runtime/polkadot/src/lib.rs b/polkadot/runtime/polkadot/src/lib.rs
index 72a5c74884..a69e28554e 100644
--- a/polkadot/runtime/polkadot/src/lib.rs
+++ b/polkadot/runtime/polkadot/src/lib.rs
@@ -1156,6 +1156,7 @@ pub type Executive = frame_executive::Executive<
 	Runtime,
 	AllPallets,
 	(
+		BountiesPrefixMigration,
 		CouncilStoragePrefixMigration,
 		TechnicalCommitteeStoragePrefixMigration,
 		TechnicalMembershipStoragePrefixMigration,
@@ -1165,6 +1166,44 @@ pub type Executive = frame_executive::Executive<
 /// The payload being signed in transactions.
 pub type SignedPayload = generic::SignedPayload<Call, SignedExtra>;
 
+const BOUNTIES_OLD_PREFIX: &str = "Treasury";
+
+/// Migrate from 'Treasury' to the new prefix 'Bounties'
+pub struct BountiesPrefixMigration;
+
+impl OnRuntimeUpgrade for BountiesPrefixMigration {
+	fn on_runtime_upgrade() -> frame_support::weights::Weight {
+		use frame_support::traits::PalletInfo;
+		let name = <Runtime as frame_system::Config>::PalletInfo::name::<Bounties>()
+			.expect("Bounties is part of runtime, so it has a name; qed");
+		pallet_bounties::migrations::v4::migrate::<Runtime, Bounties, _>(BOUNTIES_OLD_PREFIX, name)
+	}
+
+	#[cfg(feature = "try-runtime")]
+	fn pre_upgrade() -> Result<(), &'static str> {
+		use frame_support::traits::PalletInfo;
+		let name = <Runtime as frame_system::Config>::PalletInfo::name::<Bounties>()
+			.expect("Bounties is part of runtime, so it has a name; qed");
+		pallet_bounties::migrations::v4::pre_migration::<Runtime, Bounties, _>(
+			BOUNTIES_OLD_PREFIX,
+			name,
+		);
+		Ok(())
+	}
+
+	#[cfg(feature = "try-runtime")]
+	fn post_upgrade() -> Result<(), &'static str> {
+		use frame_support::traits::PalletInfo;
+		let name = <Runtime as frame_system::Config>::PalletInfo::name::<Bounties>()
+			.expect("Bounties is part of runtime, so it has a name; qed");
+		pallet_bounties::migrations::v4::post_migration::<Runtime, Bounties, _>(
+			BOUNTIES_OLD_PREFIX,
+			name,
+		);
+		Ok(())
+	}
+}
+
 const COUNCIL_OLD_PREFIX: &str = "Instance1Collective";
 /// Migrate from `Instance1Collective` to the new pallet prefix `Council`
 pub struct CouncilStoragePrefixMigration;