diff --git a/src/main/java/notifir/NotificationRequest.java b/src/main/java/notifir/NotificationRequest.java
index de26a5c..0913c59 100644
--- a/src/main/java/notifir/NotificationRequest.java
+++ b/src/main/java/notifir/NotificationRequest.java
@@ -5,13 +5,12 @@
 
 import java.io.Serializable;
 import java.util.Map;
-import java.util.Set;
 
 @Value
 @Builder(toBuilder = true)
 public class NotificationRequest implements Serializable {
   String type;
   String actionUrl;
-  Set<String> recipients;
+  String recipient;
   Map<String, Object> payload;
 }
diff --git a/src/test/java/notifir/NotifirTest.java b/src/test/java/notifir/NotifirTest.java
index 7a31a21..a9e1947 100644
--- a/src/test/java/notifir/NotifirTest.java
+++ b/src/test/java/notifir/NotifirTest.java
@@ -20,7 +20,6 @@
 import org.junit.rules.ExpectedException;
 
 import java.util.HashMap;
-import java.util.Set;
 
 
 public class NotifirTest {
@@ -37,7 +36,7 @@ public class NotifirTest {
   NotificationRequest testNotification = NotificationRequest
       .builder()
       .type("test")
-      .recipients(Set.of("user@test.com"))
+      .recipient("user@test.com")
       .payload(new HashMap<>())
       .build();
 
@@ -145,7 +144,7 @@ public void shouldThrowWhenUseWrongProjectId() throws Exception {
     NotificationRequest notification = NotificationRequest
         .builder()
         .type("test")
-        .recipients(Set.of("user@test.com"))
+        .recipient("user@test.com")
         .payload(new HashMap<>())
         .build();