diff --git a/Gemfile b/Gemfile
index 34d07ffa6..b1c4b1f48 100644
--- a/Gemfile
+++ b/Gemfile
@@ -51,7 +51,7 @@ gem "sassc-rails", "~> 2.1.2"
 gem "savon", "~> 2.12.1"
 gem "sitemap_generator", "~> 6.1.2"
 gem "social-share-button", "~> 1.2.4"
-gem "sprockets", "~> 3.7.2"
+gem "sprockets", "~> 4.0.2"
 gem "translator-text", "~> 0.1.0"
 gem "turbolinks", "~> 5.2.1"
 gem "turnout", "~> 2.5.0"
diff --git a/Gemfile.lock b/Gemfile.lock
index ebd507269..e4a65487e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -249,7 +249,7 @@ GEM
     faraday-net_http_persistent (1.2.0)
     faraday-patron (1.0.0)
     faraday-rack (1.0.0)
-    ffi (1.13.1)
+    ffi (1.15.4)
     font-awesome-sass (5.15.1)
       sassc (>= 1.11)
     foundation-rails (6.6.2.0)
@@ -573,7 +573,7 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    sassc (2.1.0)
+    sassc (2.4.0)
       ffi (~> 1.9)
     sassc-rails (2.1.2)
       railties (>= 4.0.0)
@@ -611,7 +611,7 @@ GEM
     spring (2.1.1)
     spring-commands-rspec (1.0.4)
       spring (>= 0.9.1)
-    sprockets (3.7.2)
+    sprockets (4.0.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-es6 (0.9.2)
@@ -778,7 +778,7 @@ DEPENDENCIES
   social-share-button (~> 1.2.4)
   spring (~> 2.1.1)
   spring-commands-rspec (~> 1.0.4)
-  sprockets (~> 3.7.2)
+  sprockets (~> 4.0.2)
   translator-text (~> 0.1.0)
   turbolinks (~> 5.2.1)
   turnout (~> 2.5.0)
diff --git a/app/assets/config/manifest.js b/app/assets/config/manifest.js
new file mode 100644
index 000000000..c952cc97e
--- /dev/null
+++ b/app/assets/config/manifest.js
@@ -0,0 +1,14 @@
+//= link ckeditor/application.css
+//= link ckeditor/application.js
+//
+//= link_tree ../images
+//= link application.css
+//= link application-rtl.css
+//= link application.js
+//
+//= link ckeditor/config.js
+//= link stat_graphs.js
+//= link dashboard_graphs.js
+//= link print.css
+//= link pdf_fonts.css
+//= link_tree ../../../vendor/assets/images
diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
deleted file mode 100644
index 6904fc4d7..000000000
--- a/config/initializers/assets.rb
+++ /dev/null
@@ -1,22 +0,0 @@
-# Be sure to restart your server when you modify this file.
-
-# Version of your assets, change this if you want to expire all your assets.
-Rails.application.config.assets.version = "1.0"
-
-# Add additional assets to the asset load path
-# Rails.application.config.assets.paths << Emoji.images_path
-
-# Precompile additional assets.
-# application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
-# Rails.application.config.assets.precompile += %w( search.js )
-Rails.application.config.assets.precompile += %w[ckeditor/config.js]
-Rails.application.config.assets.precompile += %w[stat_graphs.js]
-Rails.application.config.assets.precompile += %w[dashboard_graphs.js]
-Rails.application.config.assets.precompile += %w[application-rtl.css]
-Rails.application.config.assets.precompile += %w[print.css]
-Rails.application.config.assets.precompile += %w[pdf_fonts.css]
-Rails.application.config.assets.precompile += %w[sdg/*.png]
-Rails.application.config.assets.precompile += %w[sdg/**/*.png]
-Rails.application.config.assets.precompile += %w[sdg/**/*.svg]
-
-# Loads custom images and custom fonts before app/assets/images and app/assets/fonts