diff --git a/src/attrs.rs b/src/attrs.rs
index 990ff84..be012ad 100644
--- a/src/attrs.rs
+++ b/src/attrs.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
 pub use fontdb::{Family, Stretch, Style, Weight};
 
 pub struct Attrs<'a> {
diff --git a/src/swash.rs b/src/swash.rs
index 41b07e0..09c5047 100644
--- a/src/swash.rs
+++ b/src/swash.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
 use std::collections::HashMap;
 use swash::scale::{ScaleContext, image::Content};
 use swash::scale::{Render, Source, StrikeWith};