diff --git a/polkadot/xcm/pallet-xcm/src/lib.rs b/polkadot/xcm/pallet-xcm/src/lib.rs
index 9021dc73cb..808c4210b0 100644
--- a/polkadot/xcm/pallet-xcm/src/lib.rs
+++ b/polkadot/xcm/pallet-xcm/src/lib.rs
@@ -1,18 +1,18 @@
// Copyright 2020-2021 Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// This file is part of Polkadot.
-// Cumulus is free software: you can redistribute it and/or modify
+// Polkadot 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,
+// Polkadot 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 .
+// along with Polkadot. If not, see .
//! Pallet to handle XCM messages.
diff --git a/polkadot/xcm/src/v0/junction.rs b/polkadot/xcm/src/v0/junction.rs
index ff08f43547..171327a5f2 100644
--- a/polkadot/xcm/src/v0/junction.rs
+++ b/polkadot/xcm/src/v0/junction.rs
@@ -1,18 +1,18 @@
// Copyright 2020 Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// This file is part of Polkadot.
-// Substrate is free software: you can redistribute it and/or modify
+// Polkadot 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.
-// Substrate is distributed in the hope that it will be useful,
+// Polkadot 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 .
+// along with Polkadot. If not, see .
//! Support data structures for `MultiLocation`, primarily the `Junction` datatype.
diff --git a/polkadot/xcm/src/v0/mod.rs b/polkadot/xcm/src/v0/mod.rs
index 3616a9258b..d58147c172 100644
--- a/polkadot/xcm/src/v0/mod.rs
+++ b/polkadot/xcm/src/v0/mod.rs
@@ -1,18 +1,18 @@
// Copyright 2020 Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// This file is part of Polkadot.
-// Substrate is free software: you can redistribute it and/or modify
+// Polkadot 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.
-// Substrate is distributed in the hope that it will be useful,
+// Polkadot 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 .
+// along with Polkadot. If not, see .
//! Version 0 of the Cross-Consensus Message format data structures.
diff --git a/polkadot/xcm/src/v0/multi_asset.rs b/polkadot/xcm/src/v0/multi_asset.rs
index f3bfb2b2c6..ee541c3c68 100644
--- a/polkadot/xcm/src/v0/multi_asset.rs
+++ b/polkadot/xcm/src/v0/multi_asset.rs
@@ -1,18 +1,18 @@
// Copyright 2020 Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// This file is part of Polkadot.
-// Substrate is free software: you can redistribute it and/or modify
+// Polkadot 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.
-// Substrate is distributed in the hope that it will be useful,
+// Polkadot 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 .
+// along with Polkadot. If not, see .
//! Cross-Consensus Message format data structures.
diff --git a/polkadot/xcm/src/v0/multi_location.rs b/polkadot/xcm/src/v0/multi_location.rs
index 2aa296a0de..89b1071864 100644
--- a/polkadot/xcm/src/v0/multi_location.rs
+++ b/polkadot/xcm/src/v0/multi_location.rs
@@ -1,18 +1,18 @@
// Copyright 2020-2021 Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// This file is part of Polkadot.
-// Substrate is free software: you can redistribute it and/or modify
+// Polkadot 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.
-// Substrate is distributed in the hope that it will be useful,
+// Polkadot 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 .
+// along with Polkadot. If not, see .
//! Cross-Consensus Message format data structures.
diff --git a/polkadot/xcm/src/v0/order.rs b/polkadot/xcm/src/v0/order.rs
index 08f7edf352..e51d89f521 100644
--- a/polkadot/xcm/src/v0/order.rs
+++ b/polkadot/xcm/src/v0/order.rs
@@ -1,18 +1,18 @@
// Copyright 2020 Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// This file is part of Polkadot.
-// Substrate is free software: you can redistribute it and/or modify
+// Polkadot 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.
-// Substrate is distributed in the hope that it will be useful,
+// Polkadot 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 .
+// along with Polkadot. If not, see .
//! Version 0 of the Cross-Consensus Message format data structures.
diff --git a/polkadot/xcm/src/v0/traits.rs b/polkadot/xcm/src/v0/traits.rs
index 58f395716f..5c9882f61d 100644
--- a/polkadot/xcm/src/v0/traits.rs
+++ b/polkadot/xcm/src/v0/traits.rs
@@ -1,18 +1,18 @@
// Copyright 2020 Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// This file is part of Polkadot.
-// Substrate is free software: you can redistribute it and/or modify
+// Polkadot 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.
-// Substrate is distributed in the hope that it will be useful,
+// Polkadot 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 .
+// along with Polkadot. If not, see .
//! Cross-Consensus Message format data structures.
diff --git a/polkadot/xcm/src/v1/junction.rs b/polkadot/xcm/src/v1/junction.rs
index df426c65ea..06e7308ad4 100644
--- a/polkadot/xcm/src/v1/junction.rs
+++ b/polkadot/xcm/src/v1/junction.rs
@@ -1,18 +1,18 @@
// Copyright 2020 Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// This file is part of Polkadot.
-// Substrate is free software: you can redistribute it and/or modify
+// Polkadot 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.
-// Substrate is distributed in the hope that it will be useful,
+// Polkadot 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 .
+// along with Polkadot. If not, see .
//! Support data structures for `MultiLocation`, primarily the `Junction` datatype.
diff --git a/polkadot/xcm/src/v1/mod.rs b/polkadot/xcm/src/v1/mod.rs
index 5eb9340881..f06472498e 100644
--- a/polkadot/xcm/src/v1/mod.rs
+++ b/polkadot/xcm/src/v1/mod.rs
@@ -1,18 +1,18 @@
// Copyright 2020 Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// This file is part of Polkadot.
-// Substrate is free software: you can redistribute it and/or modify
+// Polkadot 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.
-// Substrate is distributed in the hope that it will be useful,
+// Polkadot 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 .
+// along with Polkadot. If not, see .
//! Version 1 of the Cross-Consensus Message format data structures.
diff --git a/polkadot/xcm/src/v1/multilocation.rs b/polkadot/xcm/src/v1/multilocation.rs
index f1546b5099..b90c548927 100644
--- a/polkadot/xcm/src/v1/multilocation.rs
+++ b/polkadot/xcm/src/v1/multilocation.rs
@@ -1,18 +1,18 @@
// Copyright 2020-2021 Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// This file is part of Polkadot.
-// Substrate is free software: you can redistribute it and/or modify
+// Polkadot 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.
-// Substrate is distributed in the hope that it will be useful,
+// Polkadot 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 .
+// along with Polkadot. If not, see .
//! Cross-Consensus Message format data structures.
diff --git a/polkadot/xcm/src/v1/order.rs b/polkadot/xcm/src/v1/order.rs
index c29bff83c4..3f54cd8ec7 100644
--- a/polkadot/xcm/src/v1/order.rs
+++ b/polkadot/xcm/src/v1/order.rs
@@ -1,18 +1,18 @@
// Copyright 2020 Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// This file is part of Polkadot.
-// Substrate is free software: you can redistribute it and/or modify
+// Polkadot 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.
-// Substrate is distributed in the hope that it will be useful,
+// Polkadot 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 .
+// along with Polkadot. If not, see .
//! Version 1 of the Cross-Consensus Message format data structures.
diff --git a/polkadot/xcm/src/v1/traits.rs b/polkadot/xcm/src/v1/traits.rs
index 419c6ec434..892b6afea9 100644
--- a/polkadot/xcm/src/v1/traits.rs
+++ b/polkadot/xcm/src/v1/traits.rs
@@ -1,18 +1,18 @@
// Copyright 2020 Parity Technologies (UK) Ltd.
-// This file is part of Cumulus.
+// This file is part of Polkadot.
-// Substrate is free software: you can redistribute it and/or modify
+// Polkadot 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.
-// Substrate is distributed in the hope that it will be useful,
+// Polkadot 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 .
+// along with Polkadot. If not, see .
//! Cross-Consensus Message format data structures.