diff --git a/senders/pagerduty/send.go b/senders/pagerduty/send.go
index f2ad0025c..9567541c5 100644
--- a/senders/pagerduty/send.go
+++ b/senders/pagerduty/send.go
@@ -21,6 +21,7 @@ func (sender *Sender) SendEvents(events moira.NotificationEvents, contact moira.
 	if err != nil {
 		return fmt.Errorf("failed to post the event to the pagerduty contact %s : %s. ", contact.Value, err)
 	}
+
 	return nil
 }
 
@@ -61,10 +62,16 @@ func (sender *Sender) buildEvent(events moira.NotificationEvents, contact moira.
 		Details:   details,
 	}
 
+	action := "trigger"
+	if events.GetSubjectState() == moira.StateOK {
+		action = "resolve"
+	}
+
 	event := pagerduty.V2Event{
 		RoutingKey: contact.Value,
-		Action:     "trigger",
+		Action:     action,
 		Payload:    payload,
+		DedupKey:   trigger.ID,
 	}
 
 	if len(plot) > 0 && sender.imageStoreConfigured {
diff --git a/senders/pagerduty/send_test.go b/senders/pagerduty/send_test.go
index 126fc3e16..594d5ef65 100644
--- a/senders/pagerduty/send_test.go
+++ b/senders/pagerduty/send_test.go
@@ -43,6 +43,7 @@ func TestBuildEvent(t *testing.T) {
 		baseExpected := pagerduty.V2Event{
 			RoutingKey: contact.Value,
 			Action:     "trigger",
+			DedupKey:   "TriggerID",
 			Payload: &pagerduty.V2Payload{
 				Summary:   "NODATA Trigger Name [tag1][tag2]",
 				Severity:  "warning",