diff --git a/config/application.yml.sample b/config/application.yml.sample
index 3212d73d7..f837daaa8 100644
--- a/config/application.yml.sample
+++ b/config/application.yml.sample
@@ -22,6 +22,8 @@ smtp_enable_starttls_auto: 'true' # 'false'
 # If your mail server requires authentication, please change.
 smtp_authentication: 'plain' # 'plain', 'login', 'cram_md5'
 
+log_level: 'warn' # 'debug', 'info', 'warn', 'error', 'fatal', 'unknown
+
 #
 # ADMIN server
 #
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 2825185d0..3f43b0f1d 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -84,6 +84,9 @@ Rails.application.configure do
     config.logger = ActiveSupport::TaggedLogging.new(logger)
   end
 
+
+  config.log_level = ENV['log_level'] || :debug
+
   # Do not dump schema after migrations.
   config.active_record.dump_schema_after_migration = false
 end