diff --git a/app/models/order_cycle.rb b/app/models/order_cycle.rb
index 430612cd4d..95d6f691d6 100644
--- a/app/models/order_cycle.rb
+++ b/app/models/order_cycle.rb
@@ -28,6 +28,8 @@ class OrderCycle < ApplicationRecord
 
   attr_accessor :incoming_exchanges, :outgoing_exchanges
 
+  before_update :reset_processed_at, if: :will_save_change_to_orders_close_at?
+
   validates :name, :coordinator_id, presence: true
   validate :orders_close_at_after_orders_open_at?
 
@@ -276,4 +278,8 @@ class OrderCycle < ApplicationRecord
 
     errors.add(:orders_close_at, :after_orders_open_at)
   end
+
+  def reset_processed_at
+    self.processed_at = nil if orders_close_at > orders_close_at_was
+  end
 end
diff --git a/spec/models/order_cycle_spec.rb b/spec/models/order_cycle_spec.rb
index dcdcab423e..ebfe0c4f14 100644
--- a/spec/models/order_cycle_spec.rb
+++ b/spec/models/order_cycle_spec.rb
@@ -371,7 +371,7 @@ describe OrderCycle do
   it "clones itself" do
     coordinator = create(:enterprise);
     oc = create(:simple_order_cycle,
-                coordinator_fees: [create(:enterprise_fee, enterprise: coordinator)], 
+                coordinator_fees: [create(:enterprise_fee, enterprise: coordinator)],
                 preferred_product_selection_from_coordinator_inventory_only: true,
                 automatic_notifications: true)
     ex1 = create(:exchange, order_cycle: oc)
@@ -545,6 +545,30 @@ describe OrderCycle do
     end
   end
 
+  describe "processed_at " do
+    let!(:oc) {
+      create(:simple_order_cycle, orders_open_at: 1.week.ago, orders_close_at: 1.day.ago, processed_at: 1.hour.ago)
+    }
+
+    it "reset processed_at if close date change in future" do
+      expect(oc.processed_at).to_not be_nil
+      oc.update!(orders_close_at: 1.week.from_now)
+      expect(oc.processed_at).to be_nil
+    end
+
+    it "it does not reset processed_at if close date change in the past" do
+      expect(oc.processed_at).to_not be_nil
+      oc.update!(orders_close_at: 2.day.ago)
+      expect(oc.processed_at).to_not be_nil
+    end
+
+    it "it does not reset processed_at if close date do not change" do
+      expect(oc.processed_at).to_not be_nil
+      oc.update!(orders_open_at: 2.weeks.ago)
+      expect(oc.processed_at).to_not be_nil
+    end
+  end
+
   def core_exchange_attributes(exchange)
     exterior_attribute_keys = %w(id order_cycle_id created_at updated_at)
     exchange.attributes.