diff --git a/src/authorizer.rs b/src/authorizer.rs
index 1f195bd..e71a5c2 100644
--- a/src/authorizer.rs
+++ b/src/authorizer.rs
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2021 Geoffroy Couprie <contact@geoffroycouprie.com>, Clément Delafargue <clement@delafargue.name>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 use std::collections::HashMap;
 
 use biscuit_auth as biscuit;
diff --git a/src/builder.rs b/src/builder.rs
index 2121fcf..28154d6 100644
--- a/src/builder.rs
+++ b/src/builder.rs
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2021 Geoffroy Couprie <contact@geoffroycouprie.com>, Clément Delafargue <clement@delafargue.name>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 use std::collections::{BTreeSet, HashMap};
 
 use biscuit_auth::{self as biscuit, builder::MapKey};
diff --git a/src/crypto.rs b/src/crypto.rs
index 1c9b443..6116820 100644
--- a/src/crypto.rs
+++ b/src/crypto.rs
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2021 Geoffroy Couprie <contact@geoffroycouprie.com>, Clément Delafargue <clement@delafargue.name>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 use std::str::FromStr;
 
 use biscuit_auth as biscuit;
diff --git a/src/lib.rs b/src/lib.rs
index 2db8463..02f1263 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2021 Geoffroy Couprie <contact@geoffroycouprie.com>, Clément Delafargue <clement@delafargue.name>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 // we need an explicitly defined `to_string`, and `from_str` methods
 // so that we can expose them to JS with a proper name.
 #![allow(clippy::inherent_to_string, clippy::should_implement_trait)]