diff --git a/crates/topola-egui/src/displayer.rs b/crates/topola-egui/src/displayer.rs
index 6023894..1874e24 100644
--- a/crates/topola-egui/src/displayer.rs
+++ b/crates/topola-egui/src/displayer.rs
@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2025 Topola contributors
 //
-// SPDX-License-Identifier: MIT OR Apache-2.0
+// SPDX-License-Identifier: MIT
 
 use petgraph::{
     data::DataMap,
diff --git a/src/autorouter/ratline.rs b/src/autorouter/ratline.rs
index 29386ad..def84b4 100644
--- a/src/autorouter/ratline.rs
+++ b/src/autorouter/ratline.rs
@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2025 Topola contributors
 //
-// SPDX-License-Identifier: MIT OR Apache-2.0
+// SPDX-License-Identifier: MIT
 
 use geo::{line_intersection::line_intersection, Distance, Euclidean, Line, LineIntersection};
 use petgraph::graph::{EdgeIndex, NodeIndex};
diff --git a/src/board/edit.rs b/src/board/edit.rs
index ba793d5..0c6c227 100644
--- a/src/board/edit.rs
+++ b/src/board/edit.rs
@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2025 Topola contributors
 //
-// SPDX-License-Identifier: MIT OR Apache-2.0
+// SPDX-License-Identifier: MIT
 
 use std::collections::BTreeMap;
 
diff --git a/src/math/circle.rs b/src/math/circle.rs
index ea5ed1b..04c7c5a 100644
--- a/src/math/circle.rs
+++ b/src/math/circle.rs
@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2025 Topola contributors
 //
-// SPDX-License-Identifier: MIT OR Apache-2.0
+// SPDX-License-Identifier: MIT
 
 use std::ops::Sub;
 
diff --git a/src/router/prenavmesh.rs b/src/router/prenavmesh.rs
index 8ed957e..5b07ad7 100644
--- a/src/router/prenavmesh.rs
+++ b/src/router/prenavmesh.rs
@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2025 Topola contributors
 //
-// SPDX-License-Identifier: MIT OR Apache-2.0
+// SPDX-License-Identifier: MIT
 
 use std::ops::{Index, IndexMut};