diff --git a/src/api.rs b/src/api.rs
index 8472d0a..3b687b9 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -1,3 +1,19 @@
+/*
+ *    Copyright 2023 Anthony Oteri
+ *
+ *    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.
+ */
+
 use serde::Deserialize;
 
 use crate::config::Config;
diff --git a/src/cli.rs b/src/cli.rs
index 322d6bc..8e4ac4e 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -1,3 +1,19 @@
+/*
+ *    Copyright 2023 Anthony Oteri
+ *
+ *    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.
+ */
+
 #![allow(unused_imports)]
 
 use std::ffi::OsString;
diff --git a/src/commands.rs b/src/commands.rs
index 3060f6d..65f432c 100644
--- a/src/commands.rs
+++ b/src/commands.rs
@@ -1,3 +1,19 @@
+/*
+ *    Copyright 2023 Anthony Oteri
+ *
+ *    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.
+ */
+
 pub mod catalog;
 pub mod tags;
 pub mod version;
diff --git a/src/commands/catalog.rs b/src/commands/catalog.rs
index 4e757a6..fb59ed8 100644
--- a/src/commands/catalog.rs
+++ b/src/commands/catalog.rs
@@ -1,3 +1,19 @@
+/*
+ *    Copyright 2023 Anthony Oteri
+ *
+ *    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.
+ */
+
 //! Command module responsible for handling the "catalog" command.
 //!
 //! The "catalog" command works with the Docker Registry API's "catalog"
diff --git a/src/commands/tags.rs b/src/commands/tags.rs
index 4ffcf3d..96c6092 100644
--- a/src/commands/tags.rs
+++ b/src/commands/tags.rs
@@ -1,3 +1,19 @@
+/*
+ *    Copyright 2023 Anthony Oteri
+ *
+ *    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.
+ */
+
 //! Command module responsible for handling the "tags" command.
 //!
 //! The "tags" command works with the Docker Registry API's "tags"
diff --git a/src/commands/version.rs b/src/commands/version.rs
index 4b328bb..a8b77a5 100644
--- a/src/commands/version.rs
+++ b/src/commands/version.rs
@@ -1,3 +1,19 @@
+/*
+ *    Copyright 2023 Anthony Oteri
+ *
+ *    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.
+ */
+
 //! Command module responsible for handling the API Version check.
 //!
 //! This is a minimal endpoint suitable for ensuring that the configured
diff --git a/src/config.rs b/src/config.rs
index 0bd612f..30aa3b3 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,3 +1,19 @@
+/*
+ *    Copyright 2023 Anthony Oteri
+ *
+ *    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.
+ */
+
 use std::fs;
 use std::path::Path;
 
diff --git a/src/error.rs b/src/error.rs
index f9bc798..58638aa 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,3 +1,19 @@
+/*
+ *    Copyright 2023 Anthony Oteri
+ *
+ *    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.
+ */
+
 #![allow(clippy::enum_variant_names)]
 
 use thiserror::Error;
diff --git a/src/main.rs b/src/main.rs
index 83eb684..cf08f2a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,19 @@
+/*
+ *    Copyright 2023 Anthony Oteri
+ *
+ *    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.
+ */
+
 use std::ffi::OsString;
 use std::path::PathBuf;