diff --git a/app/controllers/admin/base_controller.rb b/app/controllers/admin/base_controller.rb
index 7fb69d5789..8593b582a6 100644
--- a/app/controllers/admin/base_controller.rb
+++ b/app/controllers/admin/base_controller.rb
@@ -5,8 +5,15 @@ module Admin
     include Authorization
     include AccountableConcern
 
-    before_action :require_staff!
-
     layout 'admin'
+
+    before_action :require_staff!
+    before_action :set_body_classes
+
+    private
+
+    def set_body_classes
+      @body_classes = 'admin'
+    end
   end
 end
diff --git a/app/controllers/filters_controller.rb b/app/controllers/filters_controller.rb
index 175dbab072..d2e0fb7390 100644
--- a/app/controllers/filters_controller.rb
+++ b/app/controllers/filters_controller.rb
@@ -7,6 +7,7 @@ class FiltersController < ApplicationController
 
   before_action :set_filters, only: :index
   before_action :set_filter, only: [:edit, :update, :destroy]
+  before_action :set_body_classes
 
   def index
     @filters = current_account.custom_filters
@@ -54,4 +55,8 @@ class FiltersController < ApplicationController
   def resource_params
     params.require(:custom_filter).permit(:phrase, :expires_in, :irreversible, :whole_word, context: [])
   end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end
diff --git a/app/controllers/invites_controller.rb b/app/controllers/invites_controller.rb
index 3aaa2776ff..fdb3a0962a 100644
--- a/app/controllers/invites_controller.rb
+++ b/app/controllers/invites_controller.rb
@@ -6,6 +6,7 @@ class InvitesController < ApplicationController
   layout 'admin'
 
   before_action :authenticate_user!
+  before_action :set_body_classes
 
   def index
     authorize :invite, :create?
@@ -44,4 +45,8 @@ class InvitesController < ApplicationController
   def resource_params
     params.require(:invite).permit(:max_uses, :expires_in, :autofollow)
   end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end
diff --git a/app/controllers/settings/applications_controller.rb b/app/controllers/settings/applications_controller.rb
index 2a49623115..a1a2c57fa0 100644
--- a/app/controllers/settings/applications_controller.rb
+++ b/app/controllers/settings/applications_controller.rb
@@ -6,6 +6,7 @@ class Settings::ApplicationsController < ApplicationController
   before_action :authenticate_user!
   before_action :set_application, only: [:show, :update, :destroy, :regenerate]
   before_action :prepare_scopes, only: [:create, :update]
+  before_action :set_body_classes
 
   def index
     @applications = current_user.applications.order(id: :desc).page(params[:page])
@@ -69,4 +70,8 @@ class Settings::ApplicationsController < ApplicationController
     scopes = params.fetch(:doorkeeper_application, {}).fetch(:scopes, nil)
     params[:doorkeeper_application][:scopes] = scopes.join(' ') if scopes.is_a? Array
   end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end
diff --git a/app/controllers/settings/deletes_controller.rb b/app/controllers/settings/deletes_controller.rb
index 80002b995e..97f3946c87 100644
--- a/app/controllers/settings/deletes_controller.rb
+++ b/app/controllers/settings/deletes_controller.rb
@@ -5,6 +5,7 @@ class Settings::DeletesController < ApplicationController
 
   before_action :check_enabled_deletion
   before_action :authenticate_user!
+  before_action :set_body_classes
 
   def show
     @confirmation = Form::DeleteConfirmation.new
@@ -29,4 +30,8 @@ class Settings::DeletesController < ApplicationController
   def delete_params
     params.require(:form_delete_confirmation).permit(:password)
   end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end
diff --git a/app/controllers/settings/exports_controller.rb b/app/controllers/settings/exports_controller.rb
index 869e11d3bf..3a2334ef00 100644
--- a/app/controllers/settings/exports_controller.rb
+++ b/app/controllers/settings/exports_controller.rb
@@ -6,6 +6,7 @@ class Settings::ExportsController < ApplicationController
   layout 'admin'
 
   before_action :authenticate_user!
+  before_action :set_body_classes
 
   def show
     @export  = Export.new(current_account)
@@ -20,4 +21,10 @@ class Settings::ExportsController < ApplicationController
 
     redirect_to settings_export_path
   end
+
+  private
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end
diff --git a/app/controllers/settings/follower_domains_controller.rb b/app/controllers/settings/follower_domains_controller.rb
index a128bd1361..9c39e66bbb 100644
--- a/app/controllers/settings/follower_domains_controller.rb
+++ b/app/controllers/settings/follower_domains_controller.rb
@@ -4,6 +4,7 @@ class Settings::FollowerDomainsController < ApplicationController
   layout 'admin'
 
   before_action :authenticate_user!
+  before_action :set_body_classes
 
   def show
     @account = current_account
@@ -25,4 +26,8 @@ class Settings::FollowerDomainsController < ApplicationController
   def bulk_params
     params.permit(select: [])
   end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end
diff --git a/app/controllers/settings/imports_controller.rb b/app/controllers/settings/imports_controller.rb
index 0db13d1ca6..e9548ce629 100644
--- a/app/controllers/settings/imports_controller.rb
+++ b/app/controllers/settings/imports_controller.rb
@@ -5,6 +5,7 @@ class Settings::ImportsController < ApplicationController
 
   before_action :authenticate_user!
   before_action :set_account
+  before_action :set_body_classes
 
   def show
     @import = Import.new
@@ -31,4 +32,8 @@ class Settings::ImportsController < ApplicationController
   def import_params
     params.require(:import).permit(:data, :type)
   end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end
diff --git a/app/controllers/settings/migrations_controller.rb b/app/controllers/settings/migrations_controller.rb
index bc6436b87a..bd4f9c87af 100644
--- a/app/controllers/settings/migrations_controller.rb
+++ b/app/controllers/settings/migrations_controller.rb
@@ -4,6 +4,7 @@ class Settings::MigrationsController < ApplicationController
   layout 'admin'
 
   before_action :authenticate_user!
+  before_action :set_body_classes
 
   def show
     @migration = Form::Migration.new(account: current_account.moved_to_account)
@@ -31,4 +32,8 @@ class Settings::MigrationsController < ApplicationController
     current_account.moved_to_account_id != @migration.account&.id &&
       current_account.id != @migration.account&.id
   end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end
diff --git a/app/controllers/settings/notifications_controller.rb b/app/controllers/settings/notifications_controller.rb
index fe45c17b22..d0754296cc 100644
--- a/app/controllers/settings/notifications_controller.rb
+++ b/app/controllers/settings/notifications_controller.rb
@@ -4,6 +4,7 @@ class Settings::NotificationsController < ApplicationController
   layout 'admin'
 
   before_action :authenticate_user!
+  before_action :set_body_classes
 
   def show; end
 
@@ -29,4 +30,8 @@ class Settings::NotificationsController < ApplicationController
       interactions: %i(must_be_follower must_be_following must_be_following_dm)
     )
   end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end
diff --git a/app/controllers/settings/preferences_controller.rb b/app/controllers/settings/preferences_controller.rb
index b83900f07d..7bb5fb112a 100644
--- a/app/controllers/settings/preferences_controller.rb
+++ b/app/controllers/settings/preferences_controller.rb
@@ -4,6 +4,7 @@ class Settings::PreferencesController < ApplicationController
   layout 'admin'
 
   before_action :authenticate_user!
+  before_action :set_body_classes
 
   def show; end
 
@@ -51,4 +52,8 @@ class Settings::PreferencesController < ApplicationController
       interactions: %i(must_be_follower must_be_following)
     )
   end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end
diff --git a/app/controllers/settings/profiles_controller.rb b/app/controllers/settings/profiles_controller.rb
index fe265c81d2..5b3bfd71fe 100644
--- a/app/controllers/settings/profiles_controller.rb
+++ b/app/controllers/settings/profiles_controller.rb
@@ -7,6 +7,7 @@ class Settings::ProfilesController < ApplicationController
 
   before_action :authenticate_user!
   before_action :set_account
+  before_action :set_body_classes
 
   obfuscate_filename [:account, :avatar]
   obfuscate_filename [:account, :header]
@@ -34,4 +35,8 @@ class Settings::ProfilesController < ApplicationController
   def set_account
     @account = current_user.account
   end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end
diff --git a/app/controllers/settings/sessions_controller.rb b/app/controllers/settings/sessions_controller.rb
index 0da1b027b8..74cebc07b6 100644
--- a/app/controllers/settings/sessions_controller.rb
+++ b/app/controllers/settings/sessions_controller.rb
@@ -2,6 +2,7 @@
 
 class Settings::SessionsController < ApplicationController
   before_action :set_session, only: :destroy
+  before_action :set_body_classes
 
   def destroy
     @session.destroy!
@@ -14,4 +15,8 @@ class Settings::SessionsController < ApplicationController
   def set_session
     @session = current_user.session_activations.find(params[:id])
   end
+
+  def set_body_classes
+    @body_classes = 'admin'
+  end
 end
diff --git a/app/controllers/settings/two_factor_authentication/confirmations_controller.rb b/app/controllers/settings/two_factor_authentication/confirmations_controller.rb
index 8d534960d4..ee567c2a7c 100644
--- a/app/controllers/settings/two_factor_authentication/confirmations_controller.rb
+++ b/app/controllers/settings/two_factor_authentication/confirmations_controller.rb
@@ -7,6 +7,7 @@ module Settings
 
       before_action :authenticate_user!
       before_action :ensure_otp_secret
+      before_action :set_body_classes
 
       def new
         prepare_two_factor_form
@@ -43,6 +44,10 @@ module Settings
       def ensure_otp_secret
         redirect_to settings_two_factor_authentication_path unless current_user.otp_secret
       end
+
+      def set_body_classes
+        @body_classes = 'admin'
+      end
     end
   end
 end
diff --git a/app/controllers/settings/two_factor_authentication/recovery_codes_controller.rb b/app/controllers/settings/two_factor_authentication/recovery_codes_controller.rb
index e591e9502d..bfb103620b 100644
--- a/app/controllers/settings/two_factor_authentication/recovery_codes_controller.rb
+++ b/app/controllers/settings/two_factor_authentication/recovery_codes_controller.rb
@@ -6,6 +6,7 @@ module Settings
       layout 'admin'
 
       before_action :authenticate_user!
+      before_action :set_body_classes
 
       def create
         @recovery_codes = current_user.generate_otp_backup_codes!
@@ -13,6 +14,12 @@ module Settings
         flash[:notice] = I18n.t('two_factor_authentication.recovery_codes_regenerated')
         render :index
       end
+
+      private
+
+      def set_body_classes
+        @body_classes = 'admin'
+      end
     end
   end
 end
diff --git a/app/controllers/settings/two_factor_authentications_controller.rb b/app/controllers/settings/two_factor_authentications_controller.rb
index 863cc7351b..e4d8aed413 100644
--- a/app/controllers/settings/two_factor_authentications_controller.rb
+++ b/app/controllers/settings/two_factor_authentications_controller.rb
@@ -6,6 +6,7 @@ module Settings
 
     before_action :authenticate_user!
     before_action :verify_otp_required, only: [:create]
+    before_action :set_body_classes
 
     def show
       @confirmation = Form::TwoFactorConfirmation.new
@@ -43,5 +44,9 @@ module Settings
       current_user.validate_and_consume_otp!(confirmation_params[:code]) ||
         current_user.invalidate_otp_backup_code!(confirmation_params[:code])
     end
+
+    def set_body_classes
+      @body_classes = 'admin'
+    end
   end
 end
diff --git a/app/views/layouts/admin.html.haml b/app/views/layouts/admin.html.haml
index c98d85f7bf..6ce67d91e7 100644
--- a/app/views/layouts/admin.html.haml
+++ b/app/views/layouts/admin.html.haml
@@ -17,4 +17,4 @@
 
         = yield
 
-= render template: 'layouts/application', locals: { body_classes: 'admin' }
+= render template: 'layouts/application'