diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
--- a/config/initializers/assets.rb
+++ b/config/initializers/assets.rb
@@ -3,12 +3,15 @@
 # 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
+# Add additional assets to the asset load path.
 # Rails.application.config.assets.paths << Emoji.images_path
+# Add Yarn node_modules folder to the asset load path.
+Rails.application.config.assets.paths << Rails.root.join('node_modules')
 
 # 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 )
+# application.js, application.css, and all non-JS/CSS in the app/assets
+# folder are already added.
+# Rails.application.config.assets.precompile += %w( admin.js admin.css )
 Rails.application.config.assets.precompile += ['announcement_refresh.js','effects.js','site_update.js']
 Rails.application.config.assets.precompile += ['local_jquery.js','tablesorter-theme.cafe.css']
 %w( announcements submissions configurations contests contest_management graders heartbeat
@@ -16,3 +19,4 @@
     test user_admin users tags testcases).each do |controller|
   Rails.application.config.assets.precompile += ["#{controller}.js", "#{controller}.css"]
 end
+