diff --git a/www/calendar/app-calendar.less b/www/calendar/app-calendar.less
index fcaf44a53..2c4cdf081 100644
--- a/www/calendar/app-calendar.less
+++ b/www/calendar/app-calendar.less
@@ -126,12 +126,16 @@
             }
             .tui-full-calendar-section-button {
                 border: 0;
+                display: flex;
+                align-items: center;
                 button {
+                    flex: 1;
                     margin: 0;
                 }
             }
             .tui-full-calendar-popup-vertical-line {
-                display: none;
+                visibility: hidden;
+                width: 10px;
             }
         }