diff --git a/metrics/gauge_info.go b/metrics/gauge_info.go
index f1b2075939..e622d596c1 100644
--- a/metrics/gauge_info.go
+++ b/metrics/gauge_info.go
@@ -1,3 +1,19 @@
+// Copyright 2023 The CortexTheseus Authors
+// This file is part of the CortexTheseus library.
+//
+// The CortexTheseus library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The CortexTheseus library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the CortexTheseus library. If not, see <http://www.gnu.org/licenses/>.
+
 package metrics
 
 import (
diff --git a/metrics/gauge_info_test.go b/metrics/gauge_info_test.go
index 4227a6a85f..ba9fcaef61 100644
--- a/metrics/gauge_info_test.go
+++ b/metrics/gauge_info_test.go
@@ -1,3 +1,19 @@
+// Copyright 2023 The CortexTheseus Authors
+// This file is part of the CortexTheseus library.
+//
+// The CortexTheseus library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The CortexTheseus library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the CortexTheseus library. If not, see <http://www.gnu.org/licenses/>.
+
 package metrics
 
 import (