diff --git a/osbase/pki/ca.go b/osbase/pki/ca.go
index b8c2aed..ff6d639 100644
--- a/osbase/pki/ca.go
+++ b/osbase/pki/ca.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package pki
 
diff --git a/osbase/pki/certificate.go b/osbase/pki/certificate.go
index 93e6ed9..e999003 100644
--- a/osbase/pki/certificate.go
+++ b/osbase/pki/certificate.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // package pki implements an x509 PKI (Public Key Infrastructure) system backed
 // on etcd.
diff --git a/osbase/pki/certificate_test.go b/osbase/pki/certificate_test.go
index e751c54..10dce40 100644
--- a/osbase/pki/certificate_test.go
+++ b/osbase/pki/certificate_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package pki
 
 import (
diff --git a/osbase/pki/crl.go b/osbase/pki/crl.go
index 40118aa..c53054f 100644
--- a/osbase/pki/crl.go
+++ b/osbase/pki/crl.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package pki
 
 import (
diff --git a/osbase/pki/crl_test.go b/osbase/pki/crl_test.go
index e47eab9..d2becf7 100644
--- a/osbase/pki/crl_test.go
+++ b/osbase/pki/crl_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package pki
 
 import (
diff --git a/osbase/pki/x509.go b/osbase/pki/x509.go
index 40e7a08..2db1b19 100644
--- a/osbase/pki/x509.go
+++ b/osbase/pki/x509.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package pki