diff --git a/sedos_dashboard/static/css/project.css b/sedos_dashboard/static/css/project.css
index f1d543d..f0bedd5 100644
--- a/sedos_dashboard/static/css/project.css
+++ b/sedos_dashboard/static/css/project.css
@@ -11,3 +11,7 @@
   background-color: #f2dede;
   border-color: #eed3d7;
 }
+
+input:invalid {
+  border: 2px dashed red;
+}