diff --git a/Gemfile b/Gemfile
index 963ba307..1e4dc89b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ gem 'rails'
 gem 'puma', '~> 5.3'
 gem 'puma-heroku'
 # gem 'bootsnap', require: false
-gem 'sprockets', '~> 4.0.2'
+gem 'sprockets', '~> 3.7.2'
 
 # Storage
 gem 'aws-sdk', '~> 3.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index f9696fae..018e77ee 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1484,7 +1484,7 @@ GEM
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
     slack-notifier (2.4.0)
-    sprockets (4.0.2)
+    sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-es6 (0.9.2)
@@ -1602,7 +1602,7 @@ DEPENDENCIES
   serendipitous!
   sidekiq
   slack-notifier
-  sprockets (~> 4.0.2)
+  sprockets (~> 3.7.2)
   sqlite3
   stackprof
   stripe