diff --git a/lib/puma/capistrano.rb b/lib/puma/capistrano.rb
index fbe01c03..dcbe92bc 100644
--- a/lib/puma/capistrano.rb
+++ b/lib/puma/capistrano.rb
@@ -22,7 +22,7 @@ Capistrano::Configuration.instance.load do
   namespace :puma do
     desc 'Start puma'
     task :start, :roles => lambda { puma_role }, :on_no_matching_servers => :continue do
-      run "cd #{current_path} && #{puma_cmd} #{start_options}", :pty => false
+      run "cd #{current_path} && #{deploy_additional_env} #{puma_cmd} #{start_options}", :pty => false
     end
 
     desc 'Stop puma'
@@ -33,7 +33,7 @@ Capistrano::Configuration.instance.load do
     desc 'Restart puma'
     task :restart, :roles => lambda { puma_role }, :on_no_matching_servers => :continue do
       begin
-        run "cd #{current_path} && #{pumactl_cmd} -S #{state_path} restart"
+        run "cd #{current_path} && #{deploy_additional_env} #{pumactl_cmd} -S #{state_path} restart"
       rescue Capistrano::CommandError => ex
         puts "Failed to restart puma: #{ex}\nAssuming not started."
         start
@@ -43,7 +43,7 @@ Capistrano::Configuration.instance.load do
     desc 'Restart puma (phased restart)'
     task :phased_restart, :roles => lambda { puma_role }, :on_no_matching_servers => :continue do
       begin
-        run "cd #{current_path} && #{pumactl_cmd} -S #{state_path} phased-restart"
+        run "cd #{current_path} && #{deploy_additional_env} #{pumactl_cmd} -S #{state_path} phased-restart"
       rescue Capistrano::CommandError => ex
         puts "Failed to restart puma: #{ex}\nAssuming not started."
         start
@@ -72,6 +72,11 @@ Capistrano::Configuration.instance.load do
     fetch(:rack_env, fetch(:rails_env, 'production'))
   end
 
+  #add additional env when start rails, such as : secret key, db username, db pwd or other what you want.
+  def deploy_additional_env
+    fetch(:deploy_additional_env, '')
+  end
+
   def state_path
     (config_file ? configuration.options[:state] : nil) || puma_state
   end