diff --git a/config/environments/development.rb b/config/environments/development.rb
index 14f3377f7..32a81aad6 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -6,6 +6,9 @@ Zammad::Application.configure do
   # since you don't have to restart the web server when you make code changes.
   config.cache_classes = false
 
+  # Do not eager load code on boot.
+  config.eager_load = false
+
   # Show full error reports and disable caching
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = false
@@ -16,8 +19,8 @@ Zammad::Application.configure do
   # Print deprecation notices to the Rails logger
   config.active_support.deprecation = :log
 
-  # Only use best-standards-support built into browsers
-  config.action_dispatch.best_standards_support = :builtin
+  # Raise an error on page load if there are pending migrations
+  config.active_record.migration_error = :page_load
 
   # Do not compress assets
   config.assets.compress = false
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 4c418a760..e57a56520 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -4,6 +4,12 @@ Zammad::Application.configure do
   # Code is not reloaded between requests
   config.cache_classes = true
 
+  # Eager load code on boot. This eager loads most of Rails and
+  # your application in memory, allowing both thread web servers
+  # and those relying on copy on write to perform better.
+  # Rake tasks automatically ignore this option for performance.
+  config.eager_load = true
+
   # Full error reports are disabled and caching is turned on
   config.consider_all_requests_local       = false
   config.action_controller.perform_caching = true
@@ -14,14 +20,18 @@ Zammad::Application.configure do
   # Compress JavaScripts and CSS
   config.assets.compress = true
 
+  # Compress JavaScripts and CSS.
+  config.assets.js_compressor = :uglifier
+  # config.assets.css_compressor = :sass
+
   # Don't fallback to assets pipeline if a precompiled asset is missed
   config.assets.compile = false
 
   # Generate digests for assets URLs
   config.assets.digest = true
 
-  # Defaults to Rails.root.join("public/assets")
-  # config.assets.manifest = YOUR_PATH
+  # Version of your assets, change this if you want to expire all your assets.
+  config.assets.version = '1.0'
 
   # Specifies the header that your server uses for sending files
   # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
@@ -32,6 +42,7 @@ Zammad::Application.configure do
 
   # See everything in the log (default is :info)
   # config.log_level = :debug
+  config.log_level = :info
 
   # Prepend all log lines with the following tags
   # config.log_tags = [ :subdomain, :uuid ]
@@ -51,9 +62,6 @@ Zammad::Application.configure do
   # Disable delivery errors, bad email addresses will be ignored
   # config.action_mailer.raise_delivery_errors = false
 
-  # Enable threaded mode
-  # config.threadsafe!
-
   # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
   # the I18n.default_locale when a translation can not be found)
   config.i18n.fallbacks = true
@@ -61,6 +69,12 @@ Zammad::Application.configure do
   # Send deprecation notices to registered listeners
   config.active_support.deprecation = :notify
 
+  # Disable automatic flushing of the log to improve performance.
+  # config.autoflush_log = false
+
   # autoload on
   config.dependency_loading = true
+
+  # Use default logging formatter so that PID and timestamp are not suppressed.
+  config.log_formatter = ::Logger::Formatter.new
 end
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 37bab79d2..970488c3b 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -7,6 +7,11 @@ Zammad::Application.configure do
   # and recreated between test runs. Don't rely on the data there!
   config.cache_classes = true
 
+  # Do not eager load code on boot. This avoids loading your whole application
+  # just for the purpose of running a single test. If you are using a tool that
+  # preloads Rails for running tests, you may have to set it to true.
+  config.eager_load = false
+
   # Configure static asset server for tests with Cache-Control for performance
   config.serve_static_assets = true
   config.static_cache_control = "public, max-age=3600"