diff --git a/app/views/announcement/edit.haml b/app/views/announcement/edit.haml
index f08ffdda..5843a674 100644
--- a/app/views/announcement/edit.haml
+++ b/app/views/announcement/edit.haml
@@ -2,7 +2,7 @@
 .container-lg.container--main
   .card
     .card-body
-      = bootstrap_form_for(@announcement, url: { action: 'update' }, method: 'PATCH') do |f|
+      = bootstrap_form_for(@announcement, url: { action: "update" }, method: "PATCH") do |f|
         .row
           .col-md-12
             = f.text_area :content
@@ -14,12 +14,10 @@
         .row
           .col-md-6
             = f.datetime_field :starts_at,
-              class: 'datetimepicker-input',
-              data: { toggle: 'datetimepicker', target: '#announcement_starts_at', 'date-format': 'YYYY-MM-DD hh:mm A' }
+              data: { target: "#announcement_starts_at", "date-format": "YYYY-MM-DD hh:mm A" }
           .col-md-6
             = f.datetime_field :ends_at,
-              class: 'datetimepicker-input',
-              data: { toggle: 'datetimepicker', target: '#announcement_ends_at', 'date-format': 'YYYY-MM-DD hh:mm A' }
+              data: { target: "#announcement_ends_at", "date-format": "YYYY-MM-DD hh:mm A" }
         .row
           .col-md-12.text-right
-            = f.submit class: 'btn btn-primary'
+            = f.submit class: "btn btn-primary"
diff --git a/app/views/announcement/index.haml b/app/views/announcement/index.haml
index deedb02a..e7c1ae42 100644
--- a/app/views/announcement/index.haml
+++ b/app/views/announcement/index.haml
@@ -8,13 +8,13 @@
           %small.text-muted= announcement.starts_at
 
         .d-flex.w-100
-          = link_to t("voc.edit"), announcement_edit_path(id: announcement.id), class: 'btn btn-link text-primary'
+          = link_to t("voc.edit"), announcement_edit_path(id: announcement.id), class: "btn btn-link text-primary"
           = button_to t("voc.delete"),
             announcement_destroy_path(id: announcement.id),
             method: :delete,
-            class: 'btn btn-link text-danger',
+            class: "btn btn-link text-danger",
             confirm: t(".confirm")
 
   .row
     .col-md-12
-      = link_to t(".new"), :announcement_new, class: 'btn btn-primary'
+      = link_to t(".new"), :announcement_new, class: "btn btn-primary"
diff --git a/app/views/announcement/new.haml b/app/views/announcement/new.haml
index 4ced1fce..0155a77b 100644
--- a/app/views/announcement/new.haml
+++ b/app/views/announcement/new.haml
@@ -2,7 +2,7 @@
 .container-lg.container--main
   .card
     .card-body
-      = bootstrap_form_for(@announcement, url: { action: 'create' }) do |f|
+      = bootstrap_form_for(@announcement, url: { action: "create" }) do |f|
         .row
           .col-md-12
             = f.text_area :content
@@ -14,12 +14,10 @@
         .row
           .col-md-6
             = f.datetime_field :starts_at,
-              class: 'datetimepicker-input',
-              data: { toggle: 'datetimepicker', target: '#announcement_starts_at', 'date-format': 'YYYY-MM-DD hh:mm A' }
+              data: { target: "#announcement_starts_at", "date-format": "YYYY-MM-DD hh:mm A" }
           .col-md-6
             = f.datetime_field :ends_at,
-              class: 'datetimepicker-input',
-              data: { toggle: 'datetimepicker', target: '#announcement_ends_at', 'date-format': 'YYYY-MM-DD hh:mm A' }
+              data: { target: "#announcement_ends_at", "date-format": "YYYY-MM-DD hh:mm A" }
         .row
           .col-md-12.text-right
-            = f.submit class: 'btn btn-primary'
+            = f.submit class: "btn btn-primary"