diff --git a/Makefile b/Makefile
index e1271c2..52ae8e5 100644
--- a/Makefile
+++ b/Makefile
@@ -42,7 +42,7 @@ format: # format code.
 
 .PHONY: add-copyright
 add-copyright: # add license to file headers.
-	addlicense -v -f $(ROOT_DIR)/LICENSE -ignore deployment/** -ignore migrations/** .
+	@addlicense -v -f $(ROOT_DIR)/LICENSE $(ROOT_DIR) --skip-files=database.yml --skip-dirs=$(OUTPUT_DIR),deployment,migrations,configs
 
 .PHONY: swagger
 swagger: # Run swagger.
diff --git a/configs/howmuch.yml b/configs/howmuch.yml
index 4fa3b29..2c9f210 100644
--- a/configs/howmuch.yml
+++ b/configs/howmuch.yml
@@ -1,25 +1,3 @@
-# MIT License
-#
-# Copyright (c) 2024 vinchent <vinchent@vinchent.xyz>
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in all
-# copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-# SOFTWARE.
-
 dev-mode: true
 
 web: