diff --git a/app/views/managements/update_notice.html.erb b/app/views/managements/update_notice.html.erb
index adbfc43b..e7e076cf 100644
--- a/app/views/managements/update_notice.html.erb
+++ b/app/views/managements/update_notice.html.erb
@@ -41,7 +41,7 @@
             formatTime:'H:i',
             formatDate:'Y-m-d',
             validateOnBlur:false,
-            step:10
+            step:1
         });
         $('#notice_end_time').datetimepicker({
             allowBlank:true,
@@ -50,7 +50,7 @@
             formatTime:'H:i',
             formatDate:'Y-m-d',
             validateOnBlur:false,
-            step:10
+            step:1
         });
     });