diff --git a/pkg/utilities/golang/assert.go b/pkg/utilities/golang/assert.go
index 128600d..220e3c0 100644
--- a/pkg/utilities/golang/assert.go
+++ b/pkg/utilities/golang/assert.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2023 Bartłomiej Święcki (byo)
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 package golang
 
 func Assert(b bool, message string) {
diff --git a/pkg/utilities/golang/assert_test.go b/pkg/utilities/golang/assert_test.go
index 23a4800..55b3879 100644
--- a/pkg/utilities/golang/assert_test.go
+++ b/pkg/utilities/golang/assert_test.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2023 Bartłomiej Święcki (byo)
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 package golang
 
 import (