Revert "Eliminate the EventMachine dependency"

1 files changed, 2 insertions, 2 deletions

diff --git a/actioncable/lib/action_cable/channel/periodic_timers.rb b/actioncable/lib/action_cable/channel/periodic_timers.rb
index 56597d02d7..7f0fb37afc 100644
--- a/actioncable/lib/action_cable/channel/periodic_timers.rb
+++ b/actioncable/lib/action_cable/channel/periodic_timers.rb
@@ -27,14 +27,14 @@ module ActionCable
 
         def start_periodic_timers
           self.class.periodic_timers.each do |callback, options|
-            active_periodic_timers << Concurrent::TimerTask.new(execution_interval: options[:every]) do
+            active_periodic_timers << EventMachine::PeriodicTimer.new(options[:every]) do
               connection.worker_pool.async_run_periodic_timer(self, callback)
             end
           end
         end
 
         def stop_periodic_timers
-          active_periodic_timers.each { |timer| timer.shutdown }
+          active_periodic_timers.each { |timer| timer.cancel }
         end
     end
   end