diff --git a/Cargo.lock b/Cargo.lock
index a7e9516b0b4b..b7bbe8786702 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -20,7 +20,7 @@ dependencies = [
  "ctrlc 3.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "exit-future 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "polkadot-collator 0.1.0",
  "polkadot-parachain 0.1.0",
  "polkadot-primitives 0.1.0",
@@ -1854,6 +1854,14 @@ dependencies = [
  "scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "lock_api"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "log"
 version = "0.3.9"
@@ -2288,6 +2296,16 @@ dependencies = [
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "parking_lot"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lock_api 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot_core 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "parking_lot_core"
 version = "0.2.14"
@@ -2338,6 +2356,20 @@ dependencies = [
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "parking_lot_core"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "paste"
 version = "0.1.5"
@@ -2406,7 +2438,7 @@ dependencies = [
  "kvdb-rocksdb 0.1.4 (git+https://github.com/paritytech/parity-common?rev=616b40150ded71f57f650067fcbc5c99d7c343e6)",
  "log 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "parity-codec 4.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "polkadot-primitives 0.1.0",
  "substrate-primitives 2.0.0 (git+https://github.com/paritytech/substrate?branch=polkadot-master)",
 ]
@@ -2474,7 +2506,7 @@ dependencies = [
  "futures 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "parity-codec 4.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "polkadot-availability-store 0.1.0",
  "polkadot-primitives 0.1.0",
  "polkadot-validation 0.1.0",
@@ -2576,7 +2608,7 @@ dependencies = [
  "hex-literal 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "polkadot-availability-store 0.1.0",
  "polkadot-executor 0.1.0",
  "polkadot-network 0.1.0",
@@ -2621,7 +2653,7 @@ dependencies = [
  "futures-timer 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "parity-codec 4.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "polkadot-availability-store 0.1.0",
  "polkadot-parachain 0.1.0",
  "polkadot-primitives 0.1.0",
@@ -5249,6 +5281,7 @@ dependencies = [
 "checksum linked_hash_set 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3c7c91c4c7bbeb4f2f7c4e5be11e6a05bd6830bc37249c47ce1ad86ad453ff9c"
 "checksum lock_api 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "62ebf1391f6acad60e5c8b43706dde4582df75c06698ab44511d15016bc2442c"
 "checksum lock_api 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ed946d4529956a20f2d63ebe1b69996d5a2137c91913fe3ebbeff957f5bca7ff"
+"checksum lock_api 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f8912e782533a93a167888781b836336a6ca5da6175c05944c86cf28c31104dc"
 "checksum log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "e19e8d5c34a3e0e2223db8e060f9e8264aeeb5c5fc64a4ee9965c062211c024b"
 "checksum log 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)" = "c275b6ad54070ac2d665eef9197db647b32239c9d244bfb6f041a766d00da5b3"
 "checksum lru-cache 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "31e24f1ad8321ca0e8a1e0ac13f23cb668e6f5466c2c57319f6a5cf1cc8e3b1c"
@@ -5297,10 +5330,12 @@ dependencies = [
 "checksum parking_lot 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "f0802bff09003b291ba756dc7e79313e51cc31667e94afbe847def490424cde5"
 "checksum parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ab41b4aed082705d1056416ae4468b6ea99d52599ecf3169b00088d43113e337"
 "checksum parking_lot 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fa7767817701cce701d5585b9c4db3cdd02086398322c1d7e8bf5094a96a2ce7"
+"checksum parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f842b1982eb6c2fe34036a4fbfb06dd185a3f5c8edfaacdf7d1ea10b07de6252"
 "checksum parking_lot_core 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)" = "4db1a8ccf734a7bce794cc19b3df06ed87ab2f3907036b693c68f56b4d4537fa"
 "checksum parking_lot_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ad7f7e6ebdc79edff6fdcb87a55b620174f7a989e3eb31b65231f4af57f00b8c"
 "checksum parking_lot_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "94c8c7923936b28d546dfd14d4472eaf34c99b14e1c973a32b3e6d4eb04298c9"
 "checksum parking_lot_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "cb88cb1cb3790baa6776844f968fea3be44956cf184fa1be5a03341f5491278c"
+"checksum parking_lot_core 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b876b1b9e7ac6e1a74a6da34d25c42e17e8862aa409cbbbdcfc8d86c6f3bc62b"
 "checksum paste 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "1f4a4a1c555c6505821f9d58b8779d0f630a6b7e4e1be24ba718610acf01fa79"
 "checksum paste-impl 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "26e796e623b8b257215f27e6c80a5478856cae305f5b59810ff9acdaa34570e6"
 "checksum pbkdf2 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "006c038a43a45995a9670da19e67600114740e8511d4333bf97a56e66a7542d9"
diff --git a/availability-store/Cargo.toml b/availability-store/Cargo.toml
index 839d6eb3d5eb..fe69a0acf929 100644
--- a/availability-store/Cargo.toml
+++ b/availability-store/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2018"
 
 [dependencies]
 polkadot-primitives = { path = "../primitives" }
-parking_lot = "0.7.1"
+parking_lot = "0.9.0"
 log = "0.4.6"
 parity-codec = "4.1"
 substrate-primitives = { git = "https://github.com/paritytech/substrate", branch = "polkadot-master" }
diff --git a/network/Cargo.toml b/network/Cargo.toml
index 692638cb7378..9979172a3574 100644
--- a/network/Cargo.toml
+++ b/network/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2018"
 
 [dependencies]
 arrayvec = "0.4"
-parking_lot = "0.7.1"
+parking_lot = "0.9.0"
 av_store = { package = "polkadot-availability-store", path = "../availability-store" }
 polkadot-validation = { path = "../validation" }
 polkadot-primitives = { path = "../primitives" }
diff --git a/runtime/src/claims.rs b/runtime/src/claims.rs
index a659682b1c82..54eeff63373a 100644
--- a/runtime/src/claims.rs
+++ b/runtime/src/claims.rs
@@ -68,11 +68,11 @@ impl EcdsaSignature {
 
 decl_event!(
 	pub enum Event<T> where
-		B = BalanceOf<T>,
-		A = <T as system::Trait>::AccountId
+		Balance = BalanceOf<T>,
+		AccountId = <T as system::Trait>::AccountId
 	{
 		/// Someone claimed some DOTs.
-		Claimed(A, EthereumAddress, B),
+		Claimed(AccountId, EthereumAddress, Balance),
 	}
 );
 
@@ -96,6 +96,9 @@ decl_storage! {
 
 decl_module! {
 	pub struct Module<T: Trait> for enum Call where origin: T::Origin {
+		/// The Prefix that is used in signed Ethereum messages for this network
+		const Prefix: &[u8] = T::Prefix::get();
+
 		/// Deposit one of this module's events by using the default implementation.
 		fn deposit_event<T>() = default;
 
diff --git a/runtime/src/lib.rs b/runtime/src/lib.rs
index 2e90f3f22a04..7872520fe92b 100644
--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -142,7 +142,7 @@ parameter_types! {
 pub type DealWithFees = SplitTwoWays<
 	Balance,
 	NegativeImbalance,
-	_4, Treasury,   // 4 parts (80%) goes to the treasury.
+	_4, Treasury,     // 4 parts (80%) goes to the treasury.
 	_1, ToAuthor,     // 1 part (20%) goes to the block author.
 >;
 
@@ -364,6 +364,16 @@ impl slots::Trait for Runtime {
 
 impl curated_grandpa::Trait for Runtime { }
 
+parameter_types!{
+	pub const Prefix: &'static [u8] = b"Pay KSMs to the Kusama account:";
+}
+
+impl claims::Trait for Runtime {
+	type Event = Event;
+	type Currency = Balances;
+	type Prefix = Prefix;
+}
+
 impl sudo::Trait for Runtime {
 	type Event = Event;
 	type Proposal = Call;
@@ -393,6 +403,7 @@ construct_runtime!(
 		Treasury: treasury::{Module, Call, Storage, Event<T>},
 		Parachains: parachains::{Module, Call, Storage, Config<T>, Inherent, Origin},
 		Slots: slots::{Module, Call, Storage, Event<T>},
+		Claims: claims::{Module, Call, Storage, Event<T>, Config<T>, ValidateUnsigned},
 		Sudo: sudo,
 	}
 );
diff --git a/service/Cargo.toml b/service/Cargo.toml
index 5a801a23e20e..2c0e6053b603 100644
--- a/service/Cargo.toml
+++ b/service/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2018"
 
 [dependencies]
-parking_lot = "0.7.1"
+parking_lot = "0.9.0"
 lazy_static = "1.0"
 log = "0.4.6"
 slog = "^2"
diff --git a/service/src/chain_spec.rs b/service/src/chain_spec.rs
index 9ba279760dd5..fa59d218c6c4 100644
--- a/service/src/chain_spec.rs
+++ b/service/src/chain_spec.rs
@@ -22,6 +22,7 @@ use polkadot_runtime::{
 	GenesisConfig, CouncilConfig, ElectionsConfig, DemocracyConfig, SystemConfig, AuraConfig,
 	SessionConfig, StakingConfig, BalancesConfig, Perbill, SessionKeys, TechnicalCommitteeConfig,
 	GrandpaConfig, SudoConfig, IndicesConfig, CuratedGrandpaConfig, StakerStatus, WASM_BINARY,
+	ClaimsConfig,
 };
 use polkadot_runtime::constants::{currency::DOTS, time::*};
 use telemetry::TelemetryEndpoints;
@@ -126,6 +127,9 @@ fn staging_testnet_config_genesis() -> GenesisConfig {
 		curated_grandpa: Some(CuratedGrandpaConfig {
 			shuffle_period: 1024,
 		}),
+		claims: Some(ClaimsConfig {
+			claims: vec![],
+		})
 	}
 }
 
@@ -256,6 +260,9 @@ pub fn testnet_genesis(
 		curated_grandpa: Some(CuratedGrandpaConfig {
 			shuffle_period: 1024,
 		}),
+		claims: Some(ClaimsConfig {
+			claims: vec![],
+		})
 	}
 }
 
diff --git a/test-parachains/adder/collator/Cargo.toml b/test-parachains/adder/collator/Cargo.toml
index 6e98ddae2064..4c4412f3db84 100644
--- a/test-parachains/adder/collator/Cargo.toml
+++ b/test-parachains/adder/collator/Cargo.toml
@@ -10,7 +10,7 @@ parachain = { package = "polkadot-parachain", path = "../../../parachain" }
 collator = { package = "polkadot-collator", path = "../../../collator" }
 primitives = { package = "polkadot-primitives", path = "../../../primitives" }
 substrate-primitives = { git = "https://github.com/paritytech/substrate", branch = "polkadot-master" }
-parking_lot = "0.7.1"
+parking_lot = "0.9.0"
 ctrlc = { version = "3.0", features = ["termination"] }
 futures = "0.1"
 exit-future = "0.1.2"
diff --git a/validation/Cargo.toml b/validation/Cargo.toml
index e50438f6b505..f3e71c3220d7 100644
--- a/validation/Cargo.toml
+++ b/validation/Cargo.toml
@@ -8,7 +8,7 @@ edition = "2018"
 futures = "0.1.17"
 futures03 = { package = "futures-preview", version = "0.3.0-alpha.17", features = ["compat"] }
 futures-timer = "0.2.1"
-parking_lot = "0.7.1"
+parking_lot = "0.9.0"
 tokio = "0.1.7"
 derive_more = "0.14.0"
 log = "0.4.6"