diff --git a/charts/perses/templates/_helpers.tpl b/charts/perses/templates/_helpers.tpl
index 3ba77b1..34d0d00 100644
--- a/charts/perses/templates/_helpers.tpl
+++ b/charts/perses/templates/_helpers.tpl
@@ -1,3 +1,9 @@
+{{/*
+SPDX-License-Identifier: APACHE-2.0
+*/}}
+
+{{/* vim: set filetype=mustache: */}}
+
 {{/*
 Expand the name of the chart.
 */}}