diff --git a/src/net.rs b/src/net.rs
index 84d61ec..926d2f0 100644
--- a/src/net.rs
+++ b/src/net.rs
@@ -1,3 +1,7 @@
+// VpnCloud - Peer-to-Peer VPN
+// Copyright (C) 2015-2020  Dennis Schwerdel
+// This software is licensed under GPL-3 or newer (see LICENSE.md)
+
 use std::{
     collections::{HashMap, VecDeque},
     io::{self, ErrorKind},
diff --git a/src/tests/helper.rs b/src/tests/helper.rs
index 9c46d76..0a6cb65 100644
--- a/src/tests/helper.rs
+++ b/src/tests/helper.rs
@@ -1,3 +1,7 @@
+// VpnCloud - Peer-to-Peer VPN
+// Copyright (C) 2015-2020  Dennis Schwerdel
+// This software is licensed under GPL-3 or newer (see LICENSE.md)
+
 macro_rules! assert_clean {
     ($($node: expr),*) => {
         $(