diff --git a/Gemfile b/Gemfile
index a238970cc..e8fff7da6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -35,6 +35,7 @@ gem "webpacker", "~> 5.x"
 gem "cocoon", "~> 1.2"
 
 gem "sass-rails", "~> 6.0"
+gem "sprockets", "3.7.2"
 gem "normalize-rails", "~> 4.1"
 
 gem "rails-i18n", "~> 6.0.0"
diff --git a/Gemfile.lock b/Gemfile.lock
index bee4c54d7..cc62c6425 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -467,7 +467,7 @@ GEM
     spring-watcher-listen (2.0.1)
       listen (>= 2.7, < 4.0)
       spring (>= 1.2, < 3.0)
-    sprockets (4.0.2)
+    sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.2.2)
@@ -605,6 +605,7 @@ DEPENDENCIES
   simple_form (~> 5.0)
   spring (~> 2.0)
   spring-watcher-listen (~> 2.0)
+  sprockets (= 3.7.2)
   standard
   textacular (~> 5.1)
   timecop (~> 0.9)
diff --git a/app/assets/config/manifest.js b/app/assets/config/manifest.js
deleted file mode 100644
index 2ed7d4661..000000000
--- a/app/assets/config/manifest.js
+++ /dev/null
@@ -1,23 +0,0 @@
-//= link_tree ../images
-//= link _application.css
-//= link application.js
-
-//= link email.css
-
-//= link public.css
-//= link admin.css
-//= link chapter_ambassador.css
-//= link student.css
-//= link mentor.css
-//= link judge.css
-
-//= link printable_scores.css
-
-//= link public.js
-//= link admin.js
-//= link chapter_ambassador.js
-//= link student.js
-//= link mentor.js
-//= link judge.js
-
-//= link location-details.js
diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
index 872323803..a35a392f8 100644
--- a/config/initializers/assets.rb
+++ b/config/initializers/assets.rb
@@ -10,4 +10,29 @@
 # Rails.application.config.assets.paths << Emoji.images_path
 
 # Precompile additional assets.
-Rails.application.config.assets.precompile = ["manifest.js"]
+# application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
+Rails.application.config.assets.precompile += %w(
+  email.css
+
+  public.css
+  admin.css
+  chapter_ambassador.css
+  student.css
+  mentor.css
+  judge.css
+
+  printable_scores.css
+
+  public.js
+  admin.js
+  chapter_ambassador.js
+  student.js
+  mentor.js
+  judge.js
+
+  location-details.js
+
+  location-based-search.js
+  text-based-search.js
+  toggle-based-search.js
+)