diff --git a/account_financial_report/static/src/css/report.css b/account_financial_report/static/src/less/report.less
similarity index 100%
rename from account_financial_report/static/src/css/report.css
rename to account_financial_report/static/src/less/report.less
diff --git a/account_financial_report/view/report_template.xml b/account_financial_report/view/report_template.xml
index 3eabdcd5..7ec26188 100644
--- a/account_financial_report/view/report_template.xml
+++ b/account_financial_report/view/report_template.xml
@@ -4,7 +4,7 @@
     <template id="account_financial_report_assets_backend"
               name="account_financial_report assets" inherit_id="web.assets_backend">
         <xpath expr="." position="inside">
-            <link href="/account_financial_report/static/src/css/report.css" rel="stylesheet"/>
+            <link href="/account_financial_report/static/src/less/report.less" rel="stylesheet"/>
             <script type="text/javascript"
                     src="/account_financial_report/static/src/js/account_financial_report_backend.js"/>        
             <script type="text/javascript"