diff --git a/toyasm/src/main.rs b/toyasm/src/main.rs
index 124d692..ddfdb6f 100644
--- a/toyasm/src/main.rs
+++ b/toyasm/src/main.rs
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// Copyright Murad Karammaev, Nikita Kuzmin
+
 use clap::Parser;
 use std::{
     error::Error,
diff --git a/toyvm/src/main.rs b/toyvm/src/main.rs
index cdae558..a4af7f3 100644
--- a/toyvm/src/main.rs
+++ b/toyvm/src/main.rs
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// Copyright Murad Karammaev, Nikita Kuzmin
+
 use clap::Parser;
 use std::{error::Error, fs::File, io::Read, path::PathBuf};
 use toy_cpu_4bit::cpu::Cpu;