diff --git a/executor/src/lib.rs b/executor/src/lib.rs
index e30a0509b7a9..dae60088d57c 100644
--- a/executor/src/lib.rs
+++ b/executor/src/lib.rs
@@ -1,5 +1,5 @@
 // Copyright 2017 Parity Technologies (UK) Ltd.
-// This file is part of Substrate.
+// This file is part of Polkadot.
 
 // Substrate is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
diff --git a/runtime/build.rs b/runtime/build.rs
index 8aee2fb54292..571f1e972d54 100644
--- a/runtime/build.rs
+++ b/runtime/build.rs
@@ -1,5 +1,5 @@
 // Copyright 2019 Parity Technologies (UK) Ltd.
-// This file is part of Substrate.
+// This file is part of Polkadot.
 
 // Substrate is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
diff --git a/runtime/src/claims.rs b/runtime/src/claims.rs
index 2e40333717a9..6b43d7fab919 100644
--- a/runtime/src/claims.rs
+++ b/runtime/src/claims.rs
@@ -1,5 +1,5 @@
 // Copyright 2017-2018 Parity Technologies (UK) Ltd.
-// This file is part of Substrate.
+// This file is part of Polkadot.
 
 // Substrate is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
diff --git a/test-parachains/adder/build.rs b/test-parachains/adder/build.rs
index aac92f949b1b..2090e6d17bba 100644
--- a/test-parachains/adder/build.rs
+++ b/test-parachains/adder/build.rs
@@ -1,5 +1,5 @@
 // Copyright 2019 Parity Technologies (UK) Ltd.
-// This file is part of Substrate.
+// This file is part of Polkadot.
 
 // Substrate is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
diff --git a/test-parachains/halt/build.rs b/test-parachains/halt/build.rs
index aac92f949b1b..2090e6d17bba 100644
--- a/test-parachains/halt/build.rs
+++ b/test-parachains/halt/build.rs
@@ -1,5 +1,5 @@
 // Copyright 2019 Parity Technologies (UK) Ltd.
-// This file is part of Substrate.
+// This file is part of Polkadot.
 
 // Substrate is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by