diff --git a/project/ui/app.slint b/project/ui/app.slint
index 28d2a58..cf22fb0 100644
--- a/project/ui/app.slint
+++ b/project/ui/app.slint
@@ -67,17 +67,13 @@ export component Prorater inherits Window {
         }
 
         VerticalBox {
-            HorizontalBox {
-                last_billing_date := Button {
-                    text: "Last Billing Date";
-                    clicked => {
-                        date-picker.show();
-                    }
+            last_billing_date := Button {
+                text: "Last Billing Date";
+                clicked => {
+                    date-picker.show();
                 }
             }
-        }
 
-        VerticalBox {
             Button {
                 text: "Calculate";
                 clicked => {