diff --git a/app/jobs/solidus_bactracs/api/sync_shipments_job.rb b/app/jobs/solidus_bactracs/api/sync_shipments_job.rb
index 6d5e358..756170c 100644
--- a/app/jobs/solidus_bactracs/api/sync_shipments_job.rb
+++ b/app/jobs/solidus_bactracs/api/sync_shipments_job.rb
@@ -30,10 +30,7 @@ def select_shipments(shipments)
           if ThresholdVerifier.call(shipment)
             true
           else
-            ::Spree::Event.fire(
-              'solidus_bactracs.api.sync_skipped',
-              shipment: shipment,
-            )
+            ::Spree::Bus.publish(:'solidus_bactracs.api.sync_skipped', shipment: shipment)
 
             false
           end
diff --git a/lib/solidus_bactracs/api/batch_syncer.rb b/lib/solidus_bactracs/api/batch_syncer.rb
index 6150916..ffb71b7 100644
--- a/lib/solidus_bactracs/api/batch_syncer.rb
+++ b/lib/solidus_bactracs/api/batch_syncer.rb
@@ -23,19 +23,11 @@ def call(shipments)
         begin
           response = client.bulk_create_orders(shipments)
         rescue RateLimitedError => e
-          ::Spree::Event.fire(
-            'solidus_bactracs.api.rate_limited',
-            shipments: shipments,
-            error: e,
-          )
+          ::Spree::Bus.publish(:'solidus_bactracs.api.rate_limited', shipments: shipments, error: e)
 
           raise e
         rescue RequestError => e
-          ::Spree::Event.fire(
-            'solidus_bactracs.api.sync_errored',
-            shipments: shipments,
-            error: e,
-          )
+          ::Spree::Bus.publish(:'solidus_bactracs.api.sync_errored', shipments: shipments, error: e)
 
           raise e
         end
diff --git a/lib/solidus_bactracs/api/request_runner.rb b/lib/solidus_bactracs/api/request_runner.rb
index 0e0f56a..8bc9981 100644
--- a/lib/solidus_bactracs/api/request_runner.rb
+++ b/lib/solidus_bactracs/api/request_runner.rb
@@ -127,17 +127,11 @@ def rma_fail?(response)
       def shipment_synced(shipment)
         shipment.update_attribute(:bactracs_synced_at, Time.zone.now)
 
-        ::Spree::Event.fire(
-          'solidus_bactracs.api.sync_completed',
-          shipment: shipment
-        )
+        ::Spree::Bus.publish(:'solidus_bactracs.api.sync_completed', shipment: shipment)
       end
 
       def shipment_sync_failed(shipment)
-        ::Spree::Event.fire(
-          'solidus_bactracs.api.sync_failed',
-          shipment: shipment
-        )
+        ::Spree::Bus.publish(:'solidus_bactracs.api.sync_failed', shipment:)
       end
     end
   end