diff --git a/src/templates/luneClient.hbs b/src/templates/luneClient.hbs
index 03c646585..228422cb8 100644
--- a/src/templates/luneClient.hbs
+++ b/src/templates/luneClient.hbs
@@ -1,3 +1,12 @@
+// =======================================================================
+//
+// DO NOT MODIFY THIS FILE BY HAND.
+//
+// Auto-generated by `@lune-climate/openapi-typescript-codegen`
+//
+// (You can modify this by hand if its extension is .hbs)
+//
+// =======================================================================
 import axios, { AxiosInstance, AxiosResponse, isAxiosError } from 'axios'
 import camelCaseKeys from 'camelcase-keys'