diff --git a/Makefile b/Makefile
index ffe5acb..0439bf7 100644
--- a/Makefile
+++ b/Makefile
@@ -20,8 +20,7 @@ format: # format code.
 
 .PHONY: add-copyright
 add-copyright: # add license to file headers.
-	@addlicense -v -f $(ROOT_DIR)/LICENSE $(ROOT_DIR) -ignore third_party/** -ignore vendor/** -ignore $(OUTPUT_DIR)
-
+	@addlicense -v -f $(ROOT_DIR)/LICENSE  -ignore third_party/** -ignore vendor/** -ignore $(OUTPUT_DIR) $(ROOT_DIR)
 .PHONY: swagger
 swagger: # Run swagger.
 	@swagger serve -F=swagger --no-open --port 65534 $(ROOT_DIR)/api/openapi/openapi.yaml