diff --git a/src/openapi/types/resource-role-create.ts b/src/openapi/types/resource-role-create.ts
index a66bbad..1257d6a 100644
--- a/src/openapi/types/resource-role-create.ts
+++ b/src/openapi/types/resource-role-create.ts
@@ -52,6 +52,12 @@ export interface ResourceRoleCreate {
    * @memberof ResourceRoleCreate
    */
   attributes?: object;
+  /**
+   * list of role keys that define what roles this role extends. In other words: this role will automatically inherit all the permissions of the given roles in this list.
+   * @type {Array<string>}
+   * @memberof ResourceRoleCreate
+   */
+  extends?: Array<string>;
   /**
    *
    * @type {GrantedTo1}
diff --git a/src/openapi/types/resource-role-read.ts b/src/openapi/types/resource-role-read.ts
index f175f30..506459e 100644
--- a/src/openapi/types/resource-role-read.ts
+++ b/src/openapi/types/resource-role-read.ts
@@ -46,6 +46,12 @@ export interface ResourceRoleRead {
    * @memberof ResourceRoleRead
    */
   attributes?: object;
+  /**
+   * list of role keys that define what roles this role extends. In other words: this role will automatically inherit all the permissions of the given roles in this list.
+   * @type {Array<string>}
+   * @memberof ResourceRoleRead
+   */
+  extends?: Array<string>;
   /**
    *
    * @type {GrantedTo2}
diff --git a/src/openapi/types/resource-role-update.ts b/src/openapi/types/resource-role-update.ts
index 421c7aa..230be01 100644
--- a/src/openapi/types/resource-role-update.ts
+++ b/src/openapi/types/resource-role-update.ts
@@ -46,6 +46,12 @@ export interface ResourceRoleUpdate {
    * @memberof ResourceRoleUpdate
    */
   attributes?: object;
+  /**
+   * list of role keys that define what roles this role extends. In other words: this role will automatically inherit all the permissions of the given roles in this list.
+   * @type {Array<string>}
+   * @memberof ResourceRoleUpdate
+   */
+  extends?: Array<string>;
   /**
    *
    * @type {GrantedTo1}
diff --git a/src/openapi/types/role-create.ts b/src/openapi/types/role-create.ts
index 2e5fbc7..0f9bbca 100644
--- a/src/openapi/types/role-create.ts
+++ b/src/openapi/types/role-create.ts
@@ -52,6 +52,12 @@ export interface RoleCreate {
    * @memberof RoleCreate
    */
   attributes?: object;
+  /**
+   * list of role keys that define what roles this role extends. In other words: this role will automatically inherit all the permissions of the given roles in this list.
+   * @type {Array<string>}
+   * @memberof RoleCreate
+   */
+  extends?: Array<string>;
   /**
    *
    * @type {GrantedTo1}
diff --git a/src/openapi/types/role-read.ts b/src/openapi/types/role-read.ts
index dd47e7c..26863df 100644
--- a/src/openapi/types/role-read.ts
+++ b/src/openapi/types/role-read.ts
@@ -46,6 +46,12 @@ export interface RoleRead {
    * @memberof RoleRead
    */
   attributes?: object;
+  /**
+   * list of role keys that define what roles this role extends. In other words: this role will automatically inherit all the permissions of the given roles in this list.
+   * @type {Array<string>}
+   * @memberof RoleRead
+   */
+  extends?: Array<string>;
   /**
    *
    * @type {GrantedTo}
diff --git a/src/openapi/types/role-update.ts b/src/openapi/types/role-update.ts
index eea11de..23ca51d 100644
--- a/src/openapi/types/role-update.ts
+++ b/src/openapi/types/role-update.ts
@@ -46,6 +46,12 @@ export interface RoleUpdate {
    * @memberof RoleUpdate
    */
   attributes?: object;
+  /**
+   * list of role keys that define what roles this role extends. In other words: this role will automatically inherit all the permissions of the given roles in this list.
+   * @type {Array<string>}
+   * @memberof RoleUpdate
+   */
+  extends?: Array<string>;
   /**
    *
    * @type {GrantedTo1}
diff --git a/src/tests/unit/role-extends.spec.ts b/src/tests/unit/role-extends.spec.ts
new file mode 100644
index 0000000..7faabac
--- /dev/null
+++ b/src/tests/unit/role-extends.spec.ts
@@ -0,0 +1,36 @@
+import test from 'ava';
+
+import {
+  ResourceRoleCreate,
+  ResourceRoleRead,
+  ResourceRoleUpdate,
+  RoleCreate,
+  RoleRead,
+  RoleUpdate,
+} from '../../openapi/types';
+
+// Compile-time guard for the `extends` role-inheritance field on the six generated role types.
+// Removing `extends?: Array<string>` from any of them makes this file fail to compile under
+// `yarn build` (build:types -> tsc): TS2322 on the create/update object literals (excess property)
+// and TS2339 on the read member access. The runtime assertions below exist only so the test:unit
+// ava glob exercises the file; the substantive check is that it type-checks.
+const roleCreate: RoleCreate = { key: 'editor', name: 'Editor', extends: ['viewer'] };
+const roleUpdate: RoleUpdate = { extends: ['viewer'] };
+const roleReadExtends: Array<string> | undefined = ({} as RoleRead).extends;
+
+const resourceRoleCreate: ResourceRoleCreate = {
+  key: 'editor',
+  name: 'Editor',
+  extends: ['viewer'],
+};
+const resourceRoleUpdate: ResourceRoleUpdate = { extends: ['viewer'] };
+const resourceRoleReadExtends: Array<string> | undefined = ({} as ResourceRoleRead).extends;
+
+test('Role and ResourceRole types expose the `extends` inheritance field', (t) => {
+  t.deepEqual(roleCreate.extends, ['viewer']);
+  t.deepEqual(roleUpdate.extends, ['viewer']);
+  t.is(roleReadExtends, undefined);
+  t.deepEqual(resourceRoleCreate.extends, ['viewer']);
+  t.deepEqual(resourceRoleUpdate.extends, ['viewer']);
+  t.is(resourceRoleReadExtends, undefined);
+});