diff --git a/Gemfile b/Gemfile
index 43a5712..6287adb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ gem 'jbuilder', '~> 2.0'
 gem 'pg', '~> 0.21'
 gem 'puma'
 gem 'rails', '5.2.1'
-gem 'redis'
+gem 'redis', '~> 3.0'
 
 gem 'autoprefixer-rails'
 gem 'bootstrap-sass', '~> 3.3'
diff --git a/Gemfile.lock b/Gemfile.lock
index 1afadce..a0193ad 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -143,7 +143,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    redis (4.0.2)
+    redis (3.3.5)
     responders (2.4.0)
       actionpack (>= 4.2.0, < 5.3)
       railties (>= 4.2.0, < 5.3)
@@ -215,7 +215,7 @@ DEPENDENCIES
   pry-rails
   puma
   rails (= 5.2.1)
-  redis
+  redis (~> 3.0)
   sass-rails
   simple_form
   spring
diff --git a/config/cable.yml b/config/cable.yml
index 4ace22b..5427c66 100644
--- a/config/cable.yml
+++ b/config/cable.yml
@@ -6,5 +6,5 @@ test:
 
 production:
   adapter: redis
-  url: <%= ENV.fetch("REDIS_URL") { "redis://localhost:6379/1" } %>
+  url: ${REDISTOGO_URL}
   channel_prefix: polyglot_production
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 0fb7c9b..c90a719 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -46,8 +46,8 @@ Rails.application.configure do
 
   # Mount Action Cable outside main process or domain
   # config.action_cable.mount_path = nil
-  # config.action_cable.url = 'wss://example.com/cable'
-  # config.action_cable.allowed_request_origins = [ 'http://example.com', /http:\/\/example.*/ ]
+  config.action_cable.url = 'wss://polyglot-173.herokuapp.com/cable'
+  config.action_cable.allowed_request_origins = [ '*' ]
 
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   # config.force_ssl = true
@@ -94,4 +94,7 @@ Rails.application.configure do
 
   # Do not dump schema after migrations.
   config.active_record.dump_schema_after_migration = false
+
+  # Backwards compatibility
+  config.assets.js_compressor = Uglifier.new(harmony: true)
 end