diff --git a/raystack/frontier/v1beta1/frontier.proto b/raystack/frontier/v1beta1/frontier.proto
index d582a59d..1908dfb8 100644
--- a/raystack/frontier/v1beta1/frontier.proto
+++ b/raystack/frontier/v1beta1/frontier.proto
@@ -1742,7 +1742,7 @@ message CreateOrganizationInvitationRequest {
     (google.api.field_behavior) = REQUIRED,
     (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_field) = {description: "unique id of the organization to which user is invited"}
   ];
-  string user_id = 2 [
+  repeated string user_ids = 2 [
     (google.api.field_behavior) = REQUIRED,
     (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_field) = {description: "user_id is email id of user who are invited inside the organization. If user is not registered on the platform, it will be notified"}
   ];
@@ -1750,7 +1750,7 @@ message CreateOrganizationInvitationRequest {
 }
 
 message CreateOrganizationInvitationResponse {
-  Invitation invitation = 1;
+  repeated Invitation invitations = 1;
 }
 
 message GetOrganizationInvitationRequest {