diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index c1eccad..b3208d5 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -4,6 +4,8 @@ name: "Tests"
 
 on:
   push:
+    branch:
+      - "feat/improve-ci" ## TODO: Remove branch before PR.
   pull_request:
 
 jobs:
diff --git a/src/Attestation/AuthenticatorData.php b/src/Attestation/AuthenticatorData.php
index dcf7ca6..bef0f1e 100644
--- a/src/Attestation/AuthenticatorData.php
+++ b/src/Attestation/AuthenticatorData.php
@@ -18,7 +18,7 @@ use function unpack;
 /**
  * MIT License
  *
- * Copyright © 2021 Lukas Buchs
+ * Copyright (c) 2021 Lukas Buchs
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
diff --git a/src/ByteBuffer.php b/src/ByteBuffer.php
index abd948e..f386ede 100644
--- a/src/ByteBuffer.php
+++ b/src/ByteBuffer.php
@@ -49,8 +49,8 @@ use function unpack;
  * ---
  * MIT License
  *
- * Copyright © 2021 Lukas Buchs
- * Copyright © 2018 Thomas Bleeker (CBOR & ByteBuffer part)
+ * Copyright (c) 2021 Lukas Buchs
+ * Copyright (c) 2018 Thomas Bleeker (CBOR & ByteBuffer part)
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
diff --git a/src/CborDecoder.php b/src/CborDecoder.php
index 972a8f4..6e4459c 100644
--- a/src/CborDecoder.php
+++ b/src/CborDecoder.php
@@ -34,8 +34,8 @@ use function sprintf;
  * ---
  * MIT License
  *
- * Copyright © 2021 Lukas Buchs
- * Copyright © 2018 Thomas Bleeker (CBOR & ByteBuffer part)
+ * Copyright (c) 2021 Lukas Buchs
+ * Copyright (c) 2018 Thomas Bleeker (CBOR & ByteBuffer part)
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal