diff --git a/__fixtures__/output/swagger-client.merged.ts b/__fixtures__/output/swagger-client.merged.ts
index cb648c4..99a47ef 100644
--- a/__fixtures__/output/swagger-client.merged.ts
+++ b/__fixtures__/output/swagger-client.merged.ts
@@ -1,4 +1,4 @@
-import { APIClient, APIClientRequestOpts } from "@interweb/fetch-api-client";
+import { APIClient, APIClientRequestOpts, APIClientOptions } from "@interweb/fetch-api-client";
 export interface MutatingWebhook {
   admissionReviewVersions: string[];
   clientConfig: WebhookClientConfig;
@@ -10199,7 +10199,7 @@ export interface LogFileHandlerRequest {
 export interface GetServiceAccountIssuerOpenIDKeysetRequest {}
 export interface GetCodeVersionRequest {}
 export class KubernetesClient extends APIClient {
-  constructor(options) {
+  constructor(options: APIClientOptions) {
     super(options);
   }
   async getSwaggerJSON() {
diff --git a/__fixtures__/output/swagger-client.ts b/__fixtures__/output/swagger-client.ts
index a830150..881ed0e 100644
--- a/__fixtures__/output/swagger-client.ts
+++ b/__fixtures__/output/swagger-client.ts
@@ -1,4 +1,4 @@
-import { APIClient, APIClientRequestOpts } from "@interweb/fetch-api-client";
+import { APIClient, APIClientRequestOpts, APIClientOptions } from "@interweb/fetch-api-client";
 /* io.k8s.api.admissionregistration.v1.MutatingWebhook */
 /* MutatingWebhook describes an admission webhook and the resources and operations it applies to. */
 export interface MutatingWebhook {
@@ -11592,7 +11592,7 @@ export interface LogFileHandlerRequest {
 export interface GetServiceAccountIssuerOpenIDKeysetRequest {}
 export interface GetCodeVersionRequest {}
 export class KubernetesClient extends APIClient {
-  constructor(options) {
+  constructor(options: APIClientOptions) {
     super(options);
   }
   async getSwaggerJSON() {
diff --git a/__fixtures__/output/swagger-extended-client.merged.ts b/__fixtures__/output/swagger-extended-client.merged.ts
index 3ce5d3c..85de1ec 100644
--- a/__fixtures__/output/swagger-extended-client.merged.ts
+++ b/__fixtures__/output/swagger-extended-client.merged.ts
@@ -1,4 +1,4 @@
-import { APIClient, APIClientRequestOpts } from "@interweb/fetch-api-client";
+import { APIClient, APIClientRequestOpts, APIClientOptions } from "@interweb/fetch-api-client";
 export interface Alertmanager {
   apiVersion?: string;
   kind?: string;
@@ -33376,7 +33376,7 @@ export interface WatchStorageV1VolumeAttachmentRequest {
 export interface GetServiceAccountIssuerOpenIDKeysetRequest {}
 export interface GetCodeVersionRequest {}
 export class KubernetesClient extends APIClient {
-  constructor(options) {
+  constructor(options: APIClientOptions) {
     super(options);
   }
   async getSwaggerJSON() {
diff --git a/__fixtures__/output/swagger-extended-client.ts b/__fixtures__/output/swagger-extended-client.ts
index 9c09aa0..2b754b3 100644
--- a/__fixtures__/output/swagger-extended-client.ts
+++ b/__fixtures__/output/swagger-extended-client.ts
@@ -1,4 +1,4 @@
-import { APIClient, APIClientRequestOpts } from "@interweb/fetch-api-client";
+import { APIClient, APIClientRequestOpts, APIClientOptions } from "@interweb/fetch-api-client";
 /* com.coreos.monitoring.v1.Alertmanager */
 /* The `Alertmanager` custom resource definition (CRD) defines a desired [Alertmanager](https://prometheus.io/docs/alerting) setup to run in a Kubernetes cluster. It allows to specify many options such as the number of replicas, persistent storage and many more.
 
@@ -38192,7 +38192,7 @@ export interface WatchStorageV1VolumeAttachmentRequest {
 export interface GetServiceAccountIssuerOpenIDKeysetRequest {}
 export interface GetCodeVersionRequest {}
 export class KubernetesClient extends APIClient {
-  constructor(options) {
+  constructor(options: APIClientOptions) {
     super(options);
   }
   async getSwaggerJSON() {
diff --git a/packages/schema-sdk/__tests__/__snapshots__/openapi.extended.generate.test.ts.snap b/packages/schema-sdk/__tests__/__snapshots__/openapi.extended.generate.test.ts.snap
index bd735b5..b85b6b6 100644
--- a/packages/schema-sdk/__tests__/__snapshots__/openapi.extended.generate.test.ts.snap
+++ b/packages/schema-sdk/__tests__/__snapshots__/openapi.extended.generate.test.ts.snap
@@ -1,7 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`merged 1`] = `
-"import { APIClient, APIClientRequestOpts } from "@interweb/fetch-api-client";
+"import { APIClient, APIClientRequestOpts, APIClientOptions } from "@interweb/fetch-api-client";
 export interface Alertmanager {
   apiVersion?: string;
   kind?: string;
@@ -33379,7 +33379,7 @@ export interface WatchStorageV1VolumeAttachmentRequest {
 export interface GetServiceAccountIssuerOpenIDKeysetRequest {}
 export interface GetCodeVersionRequest {}
 export class KubernetesClient extends APIClient {
-  constructor(options) {
+  constructor(options: APIClientOptions) {
     super(options);
   }
   async getSwaggerJSON() {
@@ -37854,7 +37854,7 @@ export class KubernetesClient extends APIClient {
 `;
 
 exports[`swagger 1`] = `
-"import { APIClient, APIClientRequestOpts } from "@interweb/fetch-api-client";
+"import { APIClient, APIClientRequestOpts, APIClientOptions } from "@interweb/fetch-api-client";
 /* com.coreos.monitoring.v1.Alertmanager */
 /* The \`Alertmanager\` custom resource definition (CRD) defines a desired [Alertmanager](https://prometheus.io/docs/alerting) setup to run in a Kubernetes cluster. It allows to specify many options such as the number of replicas, persistent storage and many more.
 
@@ -76048,7 +76048,7 @@ export interface WatchStorageV1VolumeAttachmentRequest {
 export interface GetServiceAccountIssuerOpenIDKeysetRequest {}
 export interface GetCodeVersionRequest {}
 export class KubernetesClient extends APIClient {
-  constructor(options) {
+  constructor(options: APIClientOptions) {
     super(options);
   }
   async getSwaggerJSON() {
diff --git a/packages/schema-sdk/__tests__/__snapshots__/openapi.generate.test.ts.snap b/packages/schema-sdk/__tests__/__snapshots__/openapi.generate.test.ts.snap
index c68ddb7..9659525 100644
--- a/packages/schema-sdk/__tests__/__snapshots__/openapi.generate.test.ts.snap
+++ b/packages/schema-sdk/__tests__/__snapshots__/openapi.generate.test.ts.snap
@@ -1,7 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`merged 1`] = `
-"import { APIClient, APIClientRequestOpts } from "@interweb/fetch-api-client";
+"import { APIClient, APIClientRequestOpts, APIClientOptions } from "@interweb/fetch-api-client";
 export interface MutatingWebhook {
   admissionReviewVersions: string[];
   clientConfig: WebhookClientConfig;
@@ -10202,7 +10202,7 @@ export interface LogFileHandlerRequest {
 export interface GetServiceAccountIssuerOpenIDKeysetRequest {}
 export interface GetCodeVersionRequest {}
 export class KubernetesClient extends APIClient {
-  constructor(options) {
+  constructor(options: APIClientOptions) {
     super(options);
   }
   async getSwaggerJSON() {
@@ -13345,7 +13345,7 @@ export class KubernetesClient extends APIClient {
 `;
 
 exports[`swagger 1`] = `
-"import { APIClient, APIClientRequestOpts } from "@interweb/fetch-api-client";
+"import { APIClient, APIClientRequestOpts, APIClientOptions } from "@interweb/fetch-api-client";
 /* io.k8s.api.admissionregistration.v1.MutatingWebhook */
 /* MutatingWebhook describes an admission webhook and the resources and operations it applies to. */
 export interface MutatingWebhook {
@@ -24939,7 +24939,7 @@ export interface LogFileHandlerRequest {
 export interface GetServiceAccountIssuerOpenIDKeysetRequest {}
 export interface GetCodeVersionRequest {}
 export class KubernetesClient extends APIClient {
-  constructor(options) {
+  constructor(options: APIClientOptions) {
     super(options);
   }
   async getSwaggerJSON() {
diff --git a/packages/schema-sdk/src/openapi.ts b/packages/schema-sdk/src/openapi.ts
index 643b75b..a4c518a 100644
--- a/packages/schema-sdk/src/openapi.ts
+++ b/packages/schema-sdk/src/openapi.ts
@@ -608,11 +608,16 @@ export function generateOpenApiClient(
   }
   methods.push(...generateMethods(options, patchedSchema));
 
+  const constructorOptionsParam = t.identifier('options');
+  constructorOptionsParam.typeAnnotation = t.tsTypeAnnotation(
+    t.tsTypeReference(t.identifier('APIClientOptions'))
+  );
+
   const classBody = t.classBody([
     t.classMethod(
       'constructor',
       t.identifier('constructor'),
-      [t.identifier('options')],
+      [constructorOptionsParam],
       t.blockStatement([
         t.expressionStatement(
           t.callExpression(t.super(), [t.identifier('options')])
@@ -656,6 +661,10 @@ export function generateOpenApiClient(
               t.identifier('APIClientRequestOpts'),
               t.identifier('APIClientRequestOpts')
             ),
+            t.importSpecifier(
+              t.identifier('APIClientOptions'),
+              t.identifier('APIClientOptions')
+            ),
           ],
           t.stringLiteral(options.npmApiClient)
         ),