diff --git a/Gemfile b/Gemfile
index f5beb48c..23d1aa5a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem "bootsnap", require: false
 gem "cloudinary", require: false
 gem "factory_bot_rails"
 gem "friendly_id"
-gem "graphiql-rails"
+gem "graphiql-rails", "~> 1.4.11"
 gem "graphql"
 gem "httparty"
 gem "icalendar"
diff --git a/Gemfile.lock b/Gemfile.lock
index 016756b7..c4468abd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -119,7 +119,7 @@ GEM
       activerecord (>= 4.0.0)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
-    graphiql-rails (1.7.0)
+    graphiql-rails (1.4.11)
       railties
       sprockets-rails
     graphql (1.9.4)
@@ -368,7 +368,7 @@ DEPENDENCIES
   erb_lint
   factory_bot_rails
   friendly_id
-  graphiql-rails
+  graphiql-rails (~> 1.4.11)
   graphql
   httparty
   icalendar
diff --git a/config/environments/production.rb b/config/environments/production.rb
index bf109eac..266a1215 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -23,7 +23,10 @@
   config.public_file_server.enabled = ENV["RAILS_SERVE_STATIC_FILES"].present?
 
   # Compress JavaScripts and CSS.
-  config.assets.js_compressor = :uglifier
+  # config.assets.js_compressor = :uglifier
+  # In the future, this next line should be removed.
+  # https://github.com/rmosolgo/graphiql-rails/issues/58
+  config.assets.js_compressor = Uglifier.new(harmony: true)
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.