diff --git a/substrate/Cargo.lock b/substrate/Cargo.lock
index 61890f0510..eadfdd27c4 100644
--- a/substrate/Cargo.lock
+++ b/substrate/Cargo.lock
@@ -1005,6 +1005,7 @@ dependencies = [
  "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "native-runtime 0.1.0",
  "parking_lot 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "polkadot-primitives 0.1.0",
  "substrate-codec 0.1.0",
  "substrate-executor 0.1.0",
  "substrate-primitives 0.1.0",
@@ -1035,6 +1036,7 @@ dependencies = [
  "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "polkadot-client 0.1.0",
+ "polkadot-primitives 0.1.0",
  "rand 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
  "semver 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/substrate/client/Cargo.toml b/substrate/client/Cargo.toml
index 1239525530..b5ee065dbb 100644
--- a/substrate/client/Cargo.toml
+++ b/substrate/client/Cargo.toml
@@ -7,6 +7,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 error-chain = "0.11"
 log = "0.3"
 parking_lot = "0.4"
+polkadot-primitives = { path = "../polkadot-primitives", version = "0.1" }
 substrate-primitives = { path = "../primitives", version = "0.1" }
 substrate-state-machine = { path = "../state-machine", version = "0.1" }
 substrate-serializer = { path = "../serializer" }
diff --git a/substrate/client/src/backend.rs b/substrate/client/src/backend.rs
index 2af11f3254..563dd03699 100644
--- a/substrate/client/src/backend.rs
+++ b/substrate/client/src/backend.rs
@@ -18,7 +18,7 @@
 
 use state_machine;
 use error;
-use primitives::relay::block;
+use primitives::block;
 use blockchain::{self, BlockId};
 
 /// Block insertion transction. Keeps hold if the inseted block state and data.
@@ -50,4 +50,3 @@ pub trait Backend {
 	/// Returns state backend for specified block.
 	fn state_at(&self, block: BlockId) -> error::Result<Self::State>;
 }
-
diff --git a/substrate/client/src/blockchain.rs b/substrate/client/src/blockchain.rs
index 0b5e715731..6eb9061eb7 100644
--- a/substrate/client/src/blockchain.rs
+++ b/substrate/client/src/blockchain.rs
@@ -17,7 +17,7 @@
 //! Polkadot blockchain trait
 
 use std::fmt::{Display, Formatter, Error as FmtError};
-use primitives::relay::block;
+use primitives::block;
 use error::Result;
 
 /// Block indentification.
@@ -83,4 +83,3 @@ pub enum BlockStatus {
 	/// Not in the queue or the blockchain.
 	Unknown,
 }
-
diff --git a/substrate/client/src/genesis.rs b/substrate/client/src/genesis.rs
index 6815f6b2b5..5a48f947dd 100644
--- a/substrate/client/src/genesis.rs
+++ b/substrate/client/src/genesis.rs
@@ -17,7 +17,7 @@
 //! Tool for creating the genesis block.
 
 use std::collections::HashMap;
-use primitives::relay::{Block, Header};
+use primitives::{Block, Header};
 use triehash::trie_root;
 
 /// Create a genesis block, given the initial storage.
@@ -46,7 +46,7 @@ mod tests {
 	use state_machine::OverlayedChanges;
 	use state_machine::backend::InMemory;
 	use substrate_executor::executor;
-	use primitives::relay::{AccountId, Hash, BlockNumber, Header, Digest, UncheckedTransaction,
+	use polkadot_primitives::{AccountId, Hash, BlockNumber, Header, Digest, UncheckedTransaction,
 		Transaction, Function};
 	use ed25519::Pair;
 
diff --git a/substrate/client/src/in_mem.rs b/substrate/client/src/in_mem.rs
index c1f9d113a4..34475886c4 100644
--- a/substrate/client/src/in_mem.rs
+++ b/substrate/client/src/in_mem.rs
@@ -23,7 +23,7 @@ use error;
 use backend;
 use primitives;
 use ser;
-use primitives::relay::block::{self, HeaderHash};
+use primitives::block::{self, HeaderHash};
 use blockchain::{self, BlockId, BlockStatus};
 
 fn header_hash(header: &block::Header) -> block::HeaderHash {
@@ -201,4 +201,3 @@ impl backend::Backend for Backend {
 		}
 	}
 }
-
diff --git a/substrate/client/src/lib.rs b/substrate/client/src/lib.rs
index edf4d22c3e..f0d1fd1a63 100644
--- a/substrate/client/src/lib.rs
+++ b/substrate/client/src/lib.rs
@@ -18,6 +18,7 @@
 
 #![warn(missing_docs)]
 
+extern crate polkadot_primitives;
 extern crate substrate_primitives as primitives;
 extern crate substrate_state_machine as state_machine;
 extern crate substrate_serializer as ser;
@@ -47,8 +48,8 @@ pub use genesis::construct_genesis_block;
 pub use blockchain::Info as ChainInfo;
 pub use blockchain::BlockId;
 
-use primitives::relay::block;
-use primitives::contract::{StorageKey, StorageData};
+use primitives::block;
+use primitives::storage::{StorageKey, StorageData};
 
 use blockchain::Backend as BlockchainBackend;
 use backend::BlockImportOperation;
diff --git a/substrate/codec/src/joiner.rs b/substrate/codec/src/joiner.rs
index ac85331012..7df97e5705 100644
--- a/substrate/codec/src/joiner.rs
+++ b/substrate/codec/src/joiner.rs
@@ -16,7 +16,7 @@
 
 //! Trait
 
-use std::iter::Extend;
+use rstd::iter::Extend;
 use super::slicable::Slicable;
 
 /// Trait to allow itself to be serialised into a value which can be extended
diff --git a/substrate/codec/src/keyedvec.rs b/substrate/codec/src/keyedvec.rs
index 535a616e14..aac1df0f17 100644
--- a/substrate/codec/src/keyedvec.rs
+++ b/substrate/codec/src/keyedvec.rs
@@ -17,8 +17,8 @@
 //! Serialiser and prepender.
 
 use slicable::Slicable;
-use std::iter::Extend;
-use std::vec::Vec;
+use rstd::iter::Extend;
+use rstd::vec::Vec;
 
 /// Trait to allow itselg to be serialised and prepended by a given slice.
 pub trait KeyedVec {
diff --git a/substrate/codec/src/lib.rs b/substrate/codec/src/lib.rs
index 805c786bc4..0a672161e9 100644
--- a/substrate/codec/src/lib.rs
+++ b/substrate/codec/src/lib.rs
@@ -20,6 +20,8 @@
 #![cfg_attr(not(feature = "std"), no_std)]
 #![cfg_attr(not(feature = "std"), feature(alloc))]
 
+extern crate substrate_runtime_std as rstd;
+
 mod endiansensitive;
 mod slicable;
 mod joiner;
@@ -29,12 +31,3 @@ pub use self::endiansensitive::EndianSensitive;
 pub use self::slicable::{Slicable, NonTrivialSlicable};
 pub use self::joiner::Joiner;
 pub use self::keyedvec::KeyedVec;
-
-// TODO: move these into runtime-std and `extern crate runtime_std as std;`
-#[cfg(not(feature = "std"))]
-mod std {
-	extern crate alloc;
-
-	pub use core::*;
-	pub use self::alloc::vec;
-}
diff --git a/substrate/codec/src/slicable.rs b/substrate/codec/src/slicable.rs
index 6baa2ebaad..653bbb7b16 100644
--- a/substrate/codec/src/slicable.rs
+++ b/substrate/codec/src/slicable.rs
@@ -16,8 +16,8 @@
 
 //! Serialisation.
 
-use std::{mem, slice};
-use std::vec::Vec;
+use rstd::{mem, slice};
+use rstd::vec::Vec;
 use super::joiner::Joiner;
 use super::endiansensitive::EndianSensitive;
 
@@ -44,7 +44,7 @@ impl<T: EndianSensitive> Slicable for T {
 		let size = mem::size_of::<T>();
 		assert!(size > 0, "EndianSensitive can never be implemented for a zero-sized type.");
 		if value.len() >= size {
-			let x: T = unsafe { ::std::ptr::read(value.as_ptr() as *const T) };
+			let x: T = unsafe { ::rstd::ptr::read(value.as_ptr() as *const T) };
 			*value = &value[size..];
 			Some(x.from_le())
 		} else {
@@ -115,7 +115,7 @@ impl<T: NonTrivialSlicable> Slicable for Vec<T> {
 	}
 
 	fn to_vec(&self) -> Vec<u8> {
-		use std::iter::Extend;
+		use rstd::iter::Extend;
 
 		let len = self.len();
 		assert!(len <= u32::max_value() as usize, "Attempted to serialize vec with too many elements.");
diff --git a/substrate/collator/src/lib.rs b/substrate/collator/src/lib.rs
index da16e7520e..dfc617717f 100644
--- a/substrate/collator/src/lib.rs
+++ b/substrate/collator/src/lib.rs
@@ -60,7 +60,7 @@ pub trait ParachainContext {
 	fn produce_candidate<I: IntoIterator<Item=(ParaId, Message)>>(
 		&self,
 		ingress: I,
-	) -> (parachain::BlockData, primitives::relay::Signature);
+	) -> (parachain::BlockData, ::Signature);
 }
 
 /// Relay chain context needed to collate.
diff --git a/substrate/executor/src/native_executor.rs b/substrate/executor/src/native_executor.rs
index a89b436402..37a3a18999 100644
--- a/substrate/executor/src/native_executor.rs
+++ b/substrate/executor/src/native_executor.rs
@@ -63,7 +63,7 @@ mod tests {
 	use native_runtime::runtime::staking::balance;
 	use state_machine::TestExternalities;
 	use primitives::twox_128;
-	use primitives::relay::{Hash, Header, BlockNumber, Block, Digest, Transaction,
+	use polkadot_primitives::{Hash, Header, BlockNumber, Block, Digest, Transaction,
 		UncheckedTransaction, Function, AccountId};
 	use ed25519::Pair;
 
diff --git a/substrate/executor/src/wasm_executor.rs b/substrate/executor/src/wasm_executor.rs
index 76f9d851ff..e46991c2c3 100644
--- a/substrate/executor/src/wasm_executor.rs
+++ b/substrate/executor/src/wasm_executor.rs
@@ -293,7 +293,7 @@ mod tests {
 	use native_runtime::runtime::staking::balance;
 	use state_machine::TestExternalities;
 	use primitives::twox_128;
-	use primitives::relay::{Header, Transaction, UncheckedTransaction, Function, AccountId};
+	use polkadot_primitives::{Header, Transaction, UncheckedTransaction, Function, AccountId};
 	use runtime_io;
 	use ed25519::Pair;
 
diff --git a/substrate/network/Cargo.toml b/substrate/network/Cargo.toml
index 6591ebf919..e1e8310d33 100644
--- a/substrate/network/Cargo.toml
+++ b/substrate/network/Cargo.toml
@@ -11,6 +11,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 ethcore-network = { git = "https://github.com/paritytech/parity.git" }
 ethcore-io = { git = "https://github.com/paritytech/parity.git" }
 substrate-primitives = { path = "../primitives" }
+polkadot-primitives = { path = "../polkadot-primitives" }
 polkadot-client = { path = "../client" }
 substrate-state-machine = { path = "../state-machine" }
 substrate-serializer = { path = "../serializer" }
diff --git a/substrate/network/src/blocks.rs b/substrate/network/src/blocks.rs
index e79aff2c65..5b9ca9f6a5 100644
--- a/substrate/network/src/blocks.rs
+++ b/substrate/network/src/blocks.rs
@@ -20,7 +20,7 @@ use std::ops::Range;
 use std::collections::{HashMap, BTreeMap};
 use std::collections::hash_map::Entry;
 use network::PeerId;
-use primitives::relay::BlockNumber;
+use primitives::block::Number as BlockNumber;
 use message;
 
 const MAX_PARALLEL_DOWNLOADS: u32 = 1;
@@ -190,7 +190,7 @@ impl BlockCollection {
 mod test {
 	use super::{BlockCollection, BlockData};
 	use message;
-	use primitives::relay::{HeaderHash};
+	use primitives::HeaderHash;
 
 	fn is_empty(bc: &BlockCollection) -> bool {
 		bc.blocks.is_empty() &&
@@ -260,4 +260,3 @@ mod test {
 		assert_eq!(drained[40..], blocks[121..150].iter().map(|b| BlockData { block: b.clone(), origin: 1 }).collect::<Vec<_>>()[..]);
 	}
 }
-
diff --git a/substrate/network/src/chain.rs b/substrate/network/src/chain.rs
index cd6ebb8563..9390b727ec 100644
--- a/substrate/network/src/chain.rs
+++ b/substrate/network/src/chain.rs
@@ -19,7 +19,7 @@
 use client::{self, Client as PolkadotClient, ImportResult, ClientInfo, BlockStatus};
 use client::error::Error;
 use state_machine;
-use primitives::relay::block;
+use primitives::block;
 
 pub trait Client : Send + Sync {
 	/// Given a hash return a header
@@ -55,5 +55,3 @@ impl<B, E> Client for PolkadotClient<B, E> where
 		(self as &Client).block_hash(block_number)
 	}
 }
-
-
diff --git a/substrate/network/src/lib.rs b/substrate/network/src/lib.rs
index f1bd64d63f..6feabb0b46 100644
--- a/substrate/network/src/lib.rs
+++ b/substrate/network/src/lib.rs
@@ -28,11 +28,14 @@ extern crate parking_lot;
 extern crate smallvec;
 extern crate ipnetwork;
 extern crate substrate_primitives as primitives;
-extern crate polkadot_client as client;
 extern crate substrate_state_machine as state_machine;
 extern crate substrate_serializer as ser;
 extern crate serde;
 extern crate serde_json;
+// TODO: remove these two; split off dependent logic into polkadot-network and rename this crate
+// to substrate-network.
+extern crate polkadot_primitives as polkadot_primitives;
+extern crate polkadot_client as client;
 #[macro_use] extern crate serde_derive;
 #[macro_use] extern crate log;
 #[macro_use] extern crate bitflags;
@@ -56,7 +59,6 @@ pub use protocol::{ProtocolStatus};
 pub use network::{NonReservedPeerMode, ConnectionFilter, ConnectionDirection, NetworkConfiguration};
 
 // TODO: move it elsewhere
-fn header_hash(header: &primitives::relay::Header) -> primitives::relay::HeaderHash {
+fn header_hash(header: &primitives::Header) -> primitives::block::HeaderHash {
 	primitives::hashing::blake2_256(&ser::to_vec(header)).into()
 }
-
diff --git a/substrate/network/src/message.rs b/substrate/network/src/message.rs
index e3dce5b0f2..feefb56595 100644
--- a/substrate/network/src/message.rs
+++ b/substrate/network/src/message.rs
@@ -17,9 +17,10 @@
 //! Network packet message types. These get serialized and put into the lower level protocol payload.
 
 use std::borrow::Borrow;
-use primitives::parachain::Id as ParachainId;
-use primitives::relay::{AccountId, BlockNumber, HeaderHash, Header, Body};
+use primitives::AuthorityId;
+use primitives::block::{Number as BlockNumber, HeaderHash, Header, Body};
 use service::Role as RoleFlags;
+use polkadot_primitives::parachain::Id as ParachainId;
 
 pub type RequestId = u64;
 type Bytes = Vec<u8>;
@@ -149,7 +150,7 @@ pub struct Status {
 	/// Signatue of `best_hash` made with validator address. Required for the validator role.
 	pub validator_signature: Option<Signature>,
 	/// Validator address. Required for the validator role.
-	pub validator_id: Option<AccountId>,
+	pub validator_id: Option<AuthorityId>,
 	/// Parachain id. Required for the collator role.
 	pub parachain_id: Option<ParachainId>,
 }
diff --git a/substrate/network/src/protocol.rs b/substrate/network/src/protocol.rs
index 3d5d14dbdd..bd9dd614fe 100644
--- a/substrate/network/src/protocol.rs
+++ b/substrate/network/src/protocol.rs
@@ -20,7 +20,7 @@ use std::sync::Arc;
 use parking_lot::RwLock;
 use serde_json;
 use std::time;
-use primitives::relay::{HeaderHash, TransactionHash, BlockNumber, Header};
+use primitives::block::{HeaderHash, TransactionHash, Number as BlockNumber, Header};
 use network::{PeerId, NodeId};
 
 use message::{self, Message};
@@ -342,6 +342,3 @@ impl Protocol {
 		&*self.chain
 	}
 }
-
-
-
diff --git a/substrate/network/src/service.rs b/substrate/network/src/service.rs
index 565f7f5249..e3832249db 100644
--- a/substrate/network/src/service.rs
+++ b/substrate/network/src/service.rs
@@ -19,7 +19,7 @@ use std::collections::{BTreeMap};
 use std::io;
 use network::{NetworkProtocolHandler, NetworkService, NetworkContext, HostInfo, PeerId, ProtocolId,
 NetworkConfiguration , NonReservedPeerMode, ErrorKind};
-use primitives::relay::{TransactionHash, Header};
+use primitives::block::{TransactionHash, Header};
 use core_io::{TimerToken};
 use io::NetSyncIo;
 use protocol::{Protocol, ProtocolStatus, PeerInfo as ProtocolPeerInfo, TransactionStats};
diff --git a/substrate/network/src/sync.rs b/substrate/network/src/sync.rs
index 6bed7ec6a2..e7d2847b83 100644
--- a/substrate/network/src/sync.rs
+++ b/substrate/network/src/sync.rs
@@ -19,7 +19,7 @@ use io::SyncIo;
 use protocol::Protocol;
 use network::PeerId;
 use client::{ImportResult, BlockStatus, ClientInfo};
-use primitives::relay::{HeaderHash, BlockNumber, Header};
+use primitives::block::{HeaderHash, Number as BlockNumber, Header};
 use blocks::{self, BlockCollection};
 use message::{self, Message};
 use super::header_hash;
@@ -366,7 +366,3 @@ impl ChainSync {
 		protocol.send_message(io, peer_id, Message::BlockRequest(request));
 	}
 }
-
-
-
-
diff --git a/substrate/polkadot-primitives/src/block.rs b/substrate/polkadot-primitives/src/block.rs
index 2cfa7578e1..a5d76bf930 100644
--- a/substrate/polkadot-primitives/src/block.rs
+++ b/substrate/polkadot-primitives/src/block.rs
@@ -21,7 +21,6 @@ use primitives::bytes;
 use primitives::H256;
 use rstd::vec::Vec;
 use codec::Slicable;
-use parachain;
 use transaction::UncheckedTransaction;
 
 /// Used to refer to a block number.
@@ -161,24 +160,12 @@ impl Slicable for Header {
 	}
 }
 
-/// A relay chain block body.
-///
-/// Included candidates should be sorted by parachain ID, and without duplicate
-/// IDs.
-#[derive(PartialEq, Eq, Clone)]
-#[cfg_attr(feature = "std", derive(Serialize, Deserialize, Debug))]
-#[cfg_attr(feature = "std", serde(rename_all = "camelCase"))]
-#[cfg_attr(feature = "std", serde(deny_unknown_fields))]
-pub struct Body {
-	/// Parachain proposal blocks.
-	pub candidates: Vec<parachain::Candidate>,
-}
-
 #[cfg(test)]
 mod tests {
 	use super::*;
 	use codec::Slicable;
 	use substrate_serializer as ser;
+	use parachain;
 
 	#[test]
 	fn test_header_serialization() {
diff --git a/substrate/primitives/src/block.rs b/substrate/primitives/src/block.rs
index 057c3c9a56..4ac11f9c46 100644
--- a/substrate/primitives/src/block.rs
+++ b/substrate/primitives/src/block.rs
@@ -83,6 +83,9 @@ impl Slicable for Digest {
 	}
 }
 
+/// The body of a block is just a bunch of transactions.
+pub type Body = Vec<Transaction>;
+
 /// A Substrate relay chain block.
 #[derive(PartialEq, Eq, Clone)]
 #[cfg_attr(feature = "std", derive(Serialize, Deserialize, Debug))]
@@ -90,7 +93,7 @@ pub struct Block {
 	/// The block header.
 	pub header: Header,
 	/// All relay-chain transactions.
-	pub transactions: Vec<Transaction>,
+	pub transactions: Body,
 }
 
 impl Slicable for Block {
diff --git a/substrate/rpc/src/chain/mod.rs b/substrate/rpc/src/chain/mod.rs
index b69c2af8a0..519bdefb4a 100644
--- a/substrate/rpc/src/chain/mod.rs
+++ b/substrate/rpc/src/chain/mod.rs
@@ -16,7 +16,7 @@
 
 //! Polkadot blockchain API.
 
-use primitives::relay::block;
+use primitives::block;
 use client;
 use state_machine;
 
diff --git a/substrate/rpc/src/state/mod.rs b/substrate/rpc/src/state/mod.rs
index dd5ba7d7cb..b21b859435 100644
--- a/substrate/rpc/src/state/mod.rs
+++ b/substrate/rpc/src/state/mod.rs
@@ -22,8 +22,8 @@ mod error;
 mod tests;
 
 use client::{self, Client};
-use primitives::relay::block;
-use primitives::contract::{StorageKey, StorageData};
+use primitives::block;
+use primitives::storage::{StorageKey, StorageData};
 use state_machine;
 
 use self::error::Result;
diff --git a/substrate/runtime-std/with_std.rs b/substrate/runtime-std/with_std.rs
index 1d5b779a03..01212679fc 100644
--- a/substrate/runtime-std/with_std.rs
+++ b/substrate/runtime-std/with_std.rs
@@ -21,3 +21,5 @@ pub use std::boxed;
 pub use std::slice;
 pub use std::mem;
 pub use std::ops;
+pub use std::iter;
+pub use std::ptr;
diff --git a/substrate/runtime-std/without_std.rs b/substrate/runtime-std/without_std.rs
index 203ee02e82..ea0f278d37 100644
--- a/substrate/runtime-std/without_std.rs
+++ b/substrate/runtime-std/without_std.rs
@@ -24,3 +24,5 @@ pub use core::mem;
 pub use core::slice;
 pub use core::cell;
 pub use core::ops;
+pub use core::iter;
+pub use core::ptr;
diff --git a/substrate/wasm-runtime/polkadot/src/runtime/governance.rs b/substrate/wasm-runtime/polkadot/src/runtime/governance.rs
index 53c4369ffd..4b62d11a95 100644
--- a/substrate/wasm-runtime/polkadot/src/runtime/governance.rs
+++ b/substrate/wasm-runtime/polkadot/src/runtime/governance.rs
@@ -148,7 +148,7 @@ mod tests {
 	use runtime_io::{with_externalities, twox_128, TestExternalities};
 	use codec::{KeyedVec, Joiner};
 	use support::{one, two, with_env};
-	use primitives::relay::{AccountId, InternalFunction};
+	use polkadot_primitives::{AccountId, Proposal};
 	use runtime::{staking, session};
 
 	fn new_test_ext() -> TestExternalities {
diff --git a/substrate/wasm-runtime/polkadot/src/runtime/session.rs b/substrate/wasm-runtime/polkadot/src/runtime/session.rs
index 302919ac2a..2e3f81b645 100644
--- a/substrate/wasm-runtime/polkadot/src/runtime/session.rs
+++ b/substrate/wasm-runtime/polkadot/src/runtime/session.rs
@@ -140,7 +140,7 @@ mod tests {
 	use runtime_io::{with_externalities, twox_128, TestExternalities};
 	use codec::{KeyedVec, Joiner};
 	use support::{one, two, with_env};
-	use primitives::relay::AccountId;
+	use polkadot_primitives::AccountId;
 	use runtime::{consensus, session};
 
 	fn simple_setup() -> TestExternalities {
diff --git a/substrate/wasm-runtime/polkadot/src/runtime/staking.rs b/substrate/wasm-runtime/polkadot/src/runtime/staking.rs
index 356d778733..d6d4065dc9 100644
--- a/substrate/wasm-runtime/polkadot/src/runtime/staking.rs
+++ b/substrate/wasm-runtime/polkadot/src/runtime/staking.rs
@@ -216,7 +216,7 @@ mod tests {
 	use runtime_io::{with_externalities, twox_128, TestExternalities};
 	use codec::{KeyedVec, Joiner};
 	use support::{one, two, with_env};
-	use primitives::relay::AccountId;
+	use polkadot_primitives::AccountId;
 	use runtime::{staking, session};
 
 	#[test]
diff --git a/substrate/wasm-runtime/polkadot/src/runtime/system.rs b/substrate/wasm-runtime/polkadot/src/runtime/system.rs
index aa66c47152..269a9bc31e 100644
--- a/substrate/wasm-runtime/polkadot/src/runtime/system.rs
+++ b/substrate/wasm-runtime/polkadot/src/runtime/system.rs
@@ -221,7 +221,7 @@ mod tests {
 	use runtime_io::{with_externalities, twox_128, TestExternalities};
 	use codec::{Joiner, KeyedVec, Slicable};
 	use support::{StaticHexInto, HexDisplay, one, two};
-	use primitives::relay::{Header, Digest, UncheckedTransaction, Transaction, Function};
+	use polkadot_primitives::{Header, Digest, UncheckedTransaction, Transaction, Function};
 	use runtime::staking;
 
 	#[test]
diff --git a/substrate/wasm-runtime/polkadot/src/support/storage.rs b/substrate/wasm-runtime/polkadot/src/support/storage.rs
index e46d48cf1a..3332b7b4cd 100644
--- a/substrate/wasm-runtime/polkadot/src/support/storage.rs
+++ b/substrate/wasm-runtime/polkadot/src/support/storage.rs
@@ -338,7 +338,7 @@ mod tests {
 
 	#[test]
 	fn proposals_can_be_stored() {
-		use primitives::relay::{Proposal, InternalFunction};
+		use polkadot_primitives::{Proposal, InternalFunction};
 		let mut t = TestExternalities { storage: HashMap::new(), };
 		with_externalities(&mut t, || {
 			let x = Proposal {