diff --git a/Gemfile b/Gemfile
index bb7ba51d..8fd13faa 100644
--- a/Gemfile
+++ b/Gemfile
@@ -70,15 +70,12 @@ gem 'awesome_nested_set'
 # as templating language
 gem 'haml-rails'
 
-# for stylesheets
-gem 'sass-rails', '>= 4.0.2'
-
 # as compressor for JavaScript assets
 gem 'uglifier', '>= 1.3.0'
 
 # as the front-end framework
-gem 'autoprefixer-rails'
-gem 'bootstrap-sass', '~> 3.4.0'
+gem 'sassc-rails'
+gem 'bootstrap', '~> 5'
 gem 'cocoon'
 
 # as the JavaScript library
@@ -149,9 +146,6 @@ gem 'money-rails'
 # for lists
 gem 'acts_as_list'
 
-# for switch checkboxes
-gem 'bootstrap-switch-rails', '3.3.3' # Locked pending Bttstrp/bootstrap-switch#707
-
 # for parsing OEmbed data
 gem 'ruby-oembed'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 92367775..5b66dd05 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -95,10 +95,9 @@ GEM
     bcrypt (3.1.20)
     bigdecimal (3.1.8)
     bindex (0.8.1)
-    bootstrap-sass (3.4.1)
-      autoprefixer-rails (>= 5.2.1)
-      sassc (>= 2.0.0)
-    bootstrap-switch-rails (3.3.3)
+    bootstrap (5.3.3)
+      autoprefixer-rails (>= 9.1.0)
+      popper_js (>= 2.11.8, < 3)
     builder (3.2.4)
     byebug (11.1.3)
     cancancan (3.6.1)
@@ -368,6 +367,7 @@ GEM
       ruby-rc4
       ttfunk
     pg (1.5.6)
+    popper_js (2.11.8)
     prawn (2.5.0)
       matrix (~> 0.4)
       pdf-core (~> 0.10.0)
@@ -610,10 +610,8 @@ DEPENDENCIES
   acts_as_commentable_with_threading
   acts_as_list
   ajax-datatables-rails
-  autoprefixer-rails
   awesome_nested_set
-  bootstrap-sass (~> 3.4.0)
-  bootstrap-switch-rails (= 3.3.3)
+  bootstrap (~> 5)
   byebug
   cancancan
   capybara
@@ -685,7 +683,7 @@ DEPENDENCIES
   rubocop-rails
   rubocop-rspec
   ruby-oembed
-  sass-rails (>= 4.0.2)
+  sassc-rails
   selectize-rails
   sentry-rails
   shoulda-matchers
diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index 9a3b692a..6ab5b14b 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -33,7 +33,6 @@
 //= require holderjs
 //= require osem-datatables
 //= require osem-tickets
-//= require bootstrap-switch
 //= require osem-schedule
 //= require osem-switch
 //= require osem-bootstrap
diff --git a/app/assets/stylesheets/application.css b/app/assets/stylesheets/application.css
index 02dbfc64..8788d984 100644
--- a/app/assets/stylesheets/application.css
+++ b/app/assets/stylesheets/application.css
@@ -10,7 +10,6 @@
  *= require osem-fonts
  *= require bootstrap-markdown
  *= require leaflet
- *= require bootstrap3-switch
  *= require osem-payments
  *= require osem-navbar
  *= require selectize
diff --git a/app/assets/stylesheets/strap-on.scss b/app/assets/stylesheets/strap-on.scss
index feeecb29..1762fcbb 100644
--- a/app/assets/stylesheets/strap-on.scss
+++ b/app/assets/stylesheets/strap-on.scss
@@ -5,61 +5,8 @@ $navbar-default-color: #ffffff;
 $navbar-default-link-color: #ffffff;
 $navbar-default-link-hover-color: #000000;
 
-@import "bootstrap-sprockets";
-
 //
 // Bootstrap components
 //
 // Core variables and mixins
-@import "bootstrap/variables";
-@import "bootstrap/mixins";
-
-// Reset and dependencies
-@import "bootstrap/normalize";
-@import "bootstrap/print";
-@import "bootstrap/glyphicons";
-
-// Core CSS
-@import "bootstrap/scaffolding";
-@import "bootstrap/type";
-@import "bootstrap/code";
-@import "bootstrap/grid";
-@import "bootstrap/tables";
-@import "bootstrap/forms";
-@import "bootstrap/buttons";
-
-// Components
-@import "bootstrap/component-animations";
-@import "bootstrap/dropdowns";
-@import "bootstrap/button-groups";
-@import "bootstrap/input-groups";
-@import "bootstrap/navs";
-@import "bootstrap/navbar";
-@import "bootstrap/breadcrumbs";
-@import "bootstrap/pagination";
-@import "bootstrap/pager";
-@import "bootstrap/labels";
-@import "bootstrap/badges";
-@import "bootstrap/jumbotron";
-@import "bootstrap/thumbnails";
-@import "bootstrap/alerts";
-@import "bootstrap/progress-bars";
-@import "bootstrap/media";
-@import "bootstrap/list-group";
-@import "bootstrap/panels";
-@import "bootstrap/responsive-embed";
-@import "bootstrap/wells";
-@import "bootstrap/close";
-
-// Components w/ JavaScript
-@import "bootstrap/modals";
-@import "bootstrap/tooltip";
-@import "bootstrap/popovers";
-@import "bootstrap/carousel";
-
-// Utility classes
-@import "bootstrap/utilities";
-@import "bootstrap/responsive-utilities";
-
-// semantic classes
-@import "osem-datatables";
+@import "bootstrap";