diff --git a/src/types.ts b/src/types.ts
index 4d3ffc1..61916d8 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -290,3 +290,33 @@ export type PagerDutyEntityMappingsResponse = {
 export type PagerDutyEntityMappingResponse = {
     mapping: PagerDutyEntityMapping;
 };
+
+/** @public */
+export type PagerDutyServiceDependencyReference = {
+    id: string;
+    type: string;
+}
+
+/** @public */
+export type PagerDutyServiceDependency = {
+    id?: string,
+    type?: string,
+    supporting_service: PagerDutyServiceDependencyReference,
+    dependent_service: PagerDutyServiceDependencyReference,
+}
+
+/** @public */
+export type PagerDutyServiceDependencyResponse = {
+    relationships: PagerDutyServiceDependency[];
+}
+
+/** @public */
+export type PagerDutySetting = {
+    id: string;
+    value: "backstage" | "pagerduty" | "both" | "disabled";
+}
+
+/** @public */
+export type PagerDutySettings = {
+    settings: PagerDutySetting[];
+}
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