diff --git a/cumulus/polkadot-parachain/src/service/mod.rs b/cumulus/polkadot-parachain/src/service/mod.rs
index 7dbb1d9e7317..7df3b7a037b0 100644
--- a/cumulus/polkadot-parachain/src/service/mod.rs
+++ b/cumulus/polkadot-parachain/src/service/mod.rs
@@ -27,17 +27,6 @@ use sc_service::{PartialComponents, TFullBackend, TFullClient};
 use sc_telemetry::{Telemetry, TelemetryWorkerHandle};
 use std::{sync::Arc};
 
-/// Module with common types.
-///
-/// The idea is to help downstream implementors who don't rely on `parachains_common` for types.
-/// Proxying the imports paths via this module makes it possible to only adjust imports here, as
-/// opposed to replacing `parachains_common` imports in every file.
-pub mod common_types {
- 	pub use parachains_common::{AuraId, AccountId, Balance, Block, Hash, Nonce, Header};
-}
-
-use common_types::Block;
-
 // Exports from the service module
 
 pub use start_nodes::{
@@ -55,6 +44,17 @@ pub use consensus::{
 pub use new_partial::new_partial;
 pub use rpc_extensions::{build_contracts_rpc_extensions, build_parachain_rpc_extensions};
 
+/// Module with common types.
+///
+/// The idea is to help downstream implementors who don't rely on `parachains_common` for types.
+/// Proxying the imports paths via this module makes it possible to only adjust imports here, as
+/// opposed to replacing `parachains_common` imports in every file.
+pub mod common_types {
+	pub use parachains_common::{AuraId, AccountId, Balance, Block, Hash, Nonce, Header};
+}
+
+use common_types::Block;
+
 #[cfg(not(feature = "runtime-benchmarks"))]
 type HostFunctions = cumulus_client_service::ParachainHostFunctions;
 
diff --git a/cumulus/polkadot-parachain/src/service/rpc_extensions.rs b/cumulus/polkadot-parachain/src/service/rpc_extensions.rs
index f949207212b2..d08946f266f8 100644
--- a/cumulus/polkadot-parachain/src/service/rpc_extensions.rs
+++ b/cumulus/polkadot-parachain/src/service/rpc_extensions.rs
@@ -1,3 +1,19 @@
+// Copyright (C) Parity Technologies (UK) Ltd.
+// This file is part of Cumulus.
+
+// Cumulus is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Cumulus is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
+
 use crate::service::{
 	common_types::{AccountId, Balance, Block, Nonce},
 	ParachainBackend, ParachainClient,
diff --git a/cumulus/polkadot-parachain/src/service/start_nodes/shell.rs b/cumulus/polkadot-parachain/src/service/start_nodes/shell.rs
index 6a57e3a2e313..06407228b51f 100644
--- a/cumulus/polkadot-parachain/src/service/start_nodes/shell.rs
+++ b/cumulus/polkadot-parachain/src/service/start_nodes/shell.rs
@@ -26,7 +26,6 @@ use jsonrpsee::RpcModule;
 use sc_network::NetworkBackend;
 use sc_service::{Configuration, TaskManager};
 use sc_telemetry::TelemetryHandle;
-
 use std::sync::Arc;
 
 /// Start a polkadot-shell parachain node.