diff --git a/README.md b/README.md
index 548e28cf..cb0cb397 100644
--- a/README.md
+++ b/README.md
@@ -339,6 +339,20 @@ import { OpenAPI } from './generated';
 OpenAPI.TOKEN = 'some-bearer-token';
 ```
 
+Alternatively, we also support an async method that provides the token for each request.
+You can simply assign this method to the same `TOKEN `property in the global OpenAPI object.
+
+```typescript
+import { OpenAPI } from './generated';
+
+const getToken = async () => {
+    // Some code that requests a token...
+    return 'SOME_TOKEN';
+}
+
+OpenAPI.TOKEN = getToken;
+```
+
 
 ### Compare to other generators
 Depending on which swagger generator you use, you will see different output.
diff --git a/package.json b/package.json
index 4ee3ddb3..5bd30858 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
-    "name": "@beatgig/openapi-typescript-codegen",
-    "version": "0.5.0-async-token.2",
+    "name": "openapi-typescript-codegen",
+    "version": "0.5.1",
     "description": "NodeJS library that generates Typescript or Javascript clients based on the OpenAPI specification.",
     "author": "Ferdi Koomen",
     "homepage": "https://github.com/ferdikoomen/openapi-typescript-codegen",
diff --git a/src/templates/core/fetch/getHeaders.hbs b/src/templates/core/fetch/getHeaders.hbs
index 9bf669f5..f49610d0 100644
--- a/src/templates/core/fetch/getHeaders.hbs
+++ b/src/templates/core/fetch/getHeaders.hbs
@@ -3,9 +3,8 @@ async function getHeaders(options: ApiRequestOptions): Promise<Headers> {
         Accept: 'application/json',
         ...options.headers,
     });
-        
-    const token = typeof OpenAPI.TOKEN === 'function' ? await OpenAPI.TOKEN() : OpenAPI.TOKEN;
 
+    const token = await getToken();
     if (isDefined(token) && token !== '') {
         headers.append('Authorization', `Bearer ${token}`);
     }
diff --git a/src/templates/core/fetch/request.hbs b/src/templates/core/fetch/request.hbs
index aefe8c6a..322ddb56 100644
--- a/src/templates/core/fetch/request.hbs
+++ b/src/templates/core/fetch/request.hbs
@@ -23,6 +23,9 @@ import { OpenAPI } from './OpenAPI';
 {{>functions/getFormData}}
 
 
+{{>functions/getToken}}
+
+
 {{>fetch/getHeaders}}
 
 
diff --git a/src/templates/core/functions/getToken.hbs b/src/templates/core/functions/getToken.hbs
new file mode 100644
index 00000000..7619004c
--- /dev/null
+++ b/src/templates/core/functions/getToken.hbs
@@ -0,0 +1,6 @@
+async function getToken(): Promise<string> {
+    if (typeof OpenAPI.TOKEN === 'function') {
+        return OpenAPI.TOKEN();
+    }
+    return OpenAPI.TOKEN;
+}
diff --git a/src/templates/core/node/getHeaders.hbs b/src/templates/core/node/getHeaders.hbs
index d7363845..b8d4dc77 100644
--- a/src/templates/core/node/getHeaders.hbs
+++ b/src/templates/core/node/getHeaders.hbs
@@ -1,11 +1,12 @@
-function getHeaders(options: ApiRequestOptions): Headers {
+async function getHeaders(options: ApiRequestOptions): Promise<Headers> {
     const headers = new Headers({
         Accept: 'application/json',
         ...options.headers,
     });
 
-    if (isDefined(OpenAPI.TOKEN) && OpenAPI.TOKEN !== '') {
-        headers.append('Authorization', `Bearer ${OpenAPI.TOKEN}`);
+    const token = await getToken();
+    if (isDefined(token) && token !== '') {
+        headers.append('Authorization', `Bearer ${token}`);
     }
 
     if (options.body) {
diff --git a/src/templates/core/node/request.hbs b/src/templates/core/node/request.hbs
index 73969e30..8d916521 100644
--- a/src/templates/core/node/request.hbs
+++ b/src/templates/core/node/request.hbs
@@ -27,6 +27,9 @@ import { OpenAPI } from './OpenAPI';
 {{>functions/getFormData}}
 
 
+{{>functions/getToken}}
+
+
 {{>node/getHeaders}}
 
 
diff --git a/src/templates/core/node/sendRequest.hbs b/src/templates/core/node/sendRequest.hbs
index 98424249..e0a296e0 100644
--- a/src/templates/core/node/sendRequest.hbs
+++ b/src/templates/core/node/sendRequest.hbs
@@ -1,7 +1,7 @@
 async function sendRequest(options: ApiRequestOptions, url: string): Promise<Response> {
     const request: RequestInit = {
         method: options.method,
-        headers: getHeaders(options),
+        headers: await getHeaders(options),
         body: getRequestBody(options),
     };
     return await fetch(url, request);
diff --git a/src/templates/core/xhr/getHeaders.hbs b/src/templates/core/xhr/getHeaders.hbs
index 3d65e35e..f49610d0 100644
--- a/src/templates/core/xhr/getHeaders.hbs
+++ b/src/templates/core/xhr/getHeaders.hbs
@@ -1,11 +1,12 @@
-function getHeaders(options: ApiRequestOptions): Headers {
+async function getHeaders(options: ApiRequestOptions): Promise<Headers> {
     const headers = new Headers({
         Accept: 'application/json',
         ...options.headers,
     });
 
-    if (isDefined(OpenAPI.TOKEN) && OpenAPI.TOKEN !== '') {
-        headers.append('Authorization', `Bearer ${OpenAPI.TOKEN}`);
+    const token = await getToken();
+    if (isDefined(token) && token !== '') {
+        headers.append('Authorization', `Bearer ${token}`);
     }
 
     if (options.body) {
diff --git a/src/templates/core/xhr/request.hbs b/src/templates/core/xhr/request.hbs
index bdbab10e..4d21325a 100644
--- a/src/templates/core/xhr/request.hbs
+++ b/src/templates/core/xhr/request.hbs
@@ -26,6 +26,9 @@ import { OpenAPI } from './OpenAPI';
 {{>functions/getFormData}}
 
 
+{{>functions/getToken}}
+
+
 {{>fetch/getHeaders}}
 
 
diff --git a/src/templates/core/xhr/sendRequest.hbs b/src/templates/core/xhr/sendRequest.hbs
index 9eef0b4f..a597407e 100644
--- a/src/templates/core/xhr/sendRequest.hbs
+++ b/src/templates/core/xhr/sendRequest.hbs
@@ -1,21 +1,21 @@
-function sendRequest(options: ApiRequestOptions, url: string): Promise<XMLHttpRequest> {
+async function sendRequest(options: ApiRequestOptions, url: string): Promise<XMLHttpRequest> {
+
+    const xhr = new XMLHttpRequest();
+    xhr.open(options.method, url, true);
+    xhr.withCredentials = OpenAPI.WITH_CREDENTIALS;
+
+    const headers = await getHeaders(options);
+    headers.forEach((value: string, key: string) => {
+        xhr.setRequestHeader(key, value);
+    });
+
     return new Promise<XMLHttpRequest>((resolve, reject) => {
         try {
-            const xhr = new XMLHttpRequest();
-            xhr.open(options.method, url, true);
-            xhr.withCredentials = OpenAPI.WITH_CREDENTIALS;
-
-            const headers = getHeaders(options);
-            headers.forEach((value: string, key: string) => {
-                xhr.setRequestHeader(key, value);
-            });
-
             xhr.onreadystatechange = () => {
                 if (xhr.readyState === XMLHttpRequest.DONE) {
                     resolve(xhr);
                 }
             };
-
             xhr.send(getRequestBody(options));
         } catch (error) {
             reject(error);
diff --git a/src/utils/registerHandlebarTemplates.ts b/src/utils/registerHandlebarTemplates.ts
index dcc4be20..e555eb1b 100644
--- a/src/utils/registerHandlebarTemplates.ts
+++ b/src/utils/registerHandlebarTemplates.ts
@@ -12,6 +12,7 @@ import fetchSendRequest from '../templates/core/fetch/sendRequest.hbs';
 import functionCatchErrors from '../templates/core/functions/catchErrors.hbs';
 import functionGetFormData from '../templates/core/functions/getFormData.hbs';
 import functionGetQueryString from '../templates/core/functions/getQueryString.hbs';
+import functionGetToken from '../templates/core/functions/getToken.hbs';
 import functionGetUrl from '../templates/core/functions/getUrl.hbs';
 import functionIsBinary from '../templates/core/functions/isBinary.hbs';
 import functionIsBlob from '../templates/core/functions/isBlob.hbs';
@@ -131,6 +132,7 @@ export function registerHandlebarTemplates(): Templates {
     // Generic functions used in 'request' file @see src/templates/core/request.hbs for more info
     Handlebars.registerPartial('functions/catchErrors', Handlebars.template(functionCatchErrors));
     Handlebars.registerPartial('functions/getFormData', Handlebars.template(functionGetFormData));
+    Handlebars.registerPartial('functions/getToken', Handlebars.template(functionGetToken));
     Handlebars.registerPartial('functions/getQueryString', Handlebars.template(functionGetQueryString));
     Handlebars.registerPartial('functions/getUrl', Handlebars.template(functionGetUrl));
     Handlebars.registerPartial('functions/isBinary', Handlebars.template(functionIsBinary));
diff --git a/test/__snapshots__/index.spec.js.snap b/test/__snapshots__/index.spec.js.snap
index 840010cd..7f3ade70 100644
--- a/test/__snapshots__/index.spec.js.snap
+++ b/test/__snapshots__/index.spec.js.snap
@@ -61,7 +61,7 @@ interface Config {
     BASE: string;
     VERSION: string;
     WITH_CREDENTIALS: boolean;
-    TOKEN: string;
+    TOKEN: string | (() => Promise<string>);
 }
 
 export const OpenAPI: Config = {
@@ -134,14 +134,22 @@ function getFormData(params: Record<string, any>): FormData {
     return formData;
 }
 
-function getHeaders(options: ApiRequestOptions): Headers {
+async function getToken(): Promise<string> {
+    if (typeof OpenAPI.TOKEN === 'function') {
+        return OpenAPI.TOKEN();
+    }
+    return OpenAPI.TOKEN;
+}
+
+async function getHeaders(options: ApiRequestOptions): Promise<Headers> {
     const headers = new Headers({
         Accept: 'application/json',
         ...options.headers,
     });
 
-    if (isDefined(OpenAPI.TOKEN) && OpenAPI.TOKEN !== '') {
-        headers.append('Authorization', \`Bearer \${OpenAPI.TOKEN}\`);
+    const token = await getToken();
+    if (isDefined(token) && token !== '') {
+        headers.append('Authorization', \`Bearer \${token}\`);
     }
 
     if (options.body) {
@@ -173,7 +181,7 @@ function getRequestBody(options: ApiRequestOptions): BodyInit | undefined {
 async function sendRequest(options: ApiRequestOptions, url: string): Promise<Response> {
     const request: RequestInit = {
         method: options.method,
-        headers: getHeaders(options),
+        headers: await getHeaders(options),
         body: getRequestBody(options),
     };
     return await fetch(url, request);
@@ -2096,7 +2104,7 @@ interface Config {
     BASE: string;
     VERSION: string;
     WITH_CREDENTIALS: boolean;
-    TOKEN: string;
+    TOKEN: string | (() => Promise<string>);
 }
 
 export const OpenAPI: Config = {
@@ -2169,14 +2177,22 @@ function getFormData(params: Record<string, any>): FormData {
     return formData;
 }
 
-function getHeaders(options: ApiRequestOptions): Headers {
+async function getToken(): Promise<string> {
+    if (typeof OpenAPI.TOKEN === 'function') {
+        return OpenAPI.TOKEN();
+    }
+    return OpenAPI.TOKEN;
+}
+
+async function getHeaders(options: ApiRequestOptions): Promise<Headers> {
     const headers = new Headers({
         Accept: 'application/json',
         ...options.headers,
     });
 
-    if (isDefined(OpenAPI.TOKEN) && OpenAPI.TOKEN !== '') {
-        headers.append('Authorization', \`Bearer \${OpenAPI.TOKEN}\`);
+    const token = await getToken();
+    if (isDefined(token) && token !== '') {
+        headers.append('Authorization', \`Bearer \${token}\`);
     }
 
     if (options.body) {
@@ -2208,7 +2224,7 @@ function getRequestBody(options: ApiRequestOptions): BodyInit | undefined {
 async function sendRequest(options: ApiRequestOptions, url: string): Promise<Response> {
     const request: RequestInit = {
         method: options.method,
-        headers: getHeaders(options),
+        headers: await getHeaders(options),
         body: getRequestBody(options),
     };
     return await fetch(url, request);
diff --git a/test/e2e/scripts/browser.js b/test/e2e/scripts/browser.js
index ca0dc6de..40b1d6e0 100644
--- a/test/e2e/scripts/browser.js
+++ b/test/e2e/scripts/browser.js
@@ -27,8 +27,8 @@ async function stop() {
     await browser.close();
 }
 
-async function evaluate(fn) {
-    return await page.evaluate(fn);
+async function evaluate(fn, ...args) {
+    return await page.evaluate(fn, args);
 }
 
 module.exports = {
diff --git a/test/e2e/v2.babel.spec.js b/test/e2e/v2.babel.spec.js
index c9f3a880..b133573b 100644
--- a/test/e2e/v2.babel.spec.js
+++ b/test/e2e/v2.babel.spec.js
@@ -21,6 +21,18 @@ describe('v2.fetch', () => {
         await browser.stop();
     });
 
+    it('requests token', async () => {
+        const result = await browser.evaluate(async () => {
+            window.api.OpenAPI.TOKEN = new Promise(resolve => {
+                setTimeout(() => {
+                    resolve('MY_TOKEN');
+                }, 500);
+            });
+            return await window.api.SimpleService.getCallWithoutParametersAndResponse();
+        });
+        expect(result.headers.authorization).toBe('Bearer MY_TOKEN');
+    });
+
     it('complexService', async () => {
         const result = await browser.evaluate(async () => {
             return await window.api.ComplexService.complexTypes({
diff --git a/test/e2e/v2.fetch.spec.js b/test/e2e/v2.fetch.spec.js
index eae92e03..e881e361 100644
--- a/test/e2e/v2.fetch.spec.js
+++ b/test/e2e/v2.fetch.spec.js
@@ -21,6 +21,18 @@ describe('v2.fetch', () => {
         await browser.stop();
     });
 
+    it('requests token', async () => {
+        const result = await browser.evaluate(async () => {
+            window.api.OpenAPI.TOKEN = new Promise(resolve => {
+                setTimeout(() => {
+                    resolve('MY_TOKEN');
+                }, 500);
+            });
+            return await window.api.SimpleService.getCallWithoutParametersAndResponse();
+        });
+        expect(result.headers.authorization).toBe('Bearer MY_TOKEN');
+    });
+
     it('complexService', async () => {
         const result = await browser.evaluate(async () => {
             return await window.api.ComplexService.complexTypes({
diff --git a/test/e2e/v2.node.spec.js b/test/e2e/v2.node.spec.js
index 5dc2ca6b..9b602e5c 100644
--- a/test/e2e/v2.node.spec.js
+++ b/test/e2e/v2.node.spec.js
@@ -17,8 +17,17 @@ describe('v2.node', () => {
         await server.stop();
     });
 
+    it('requests token', async () => {
+        const { OpenAPI, SimpleService } = require('./generated/v2/node/index.js');
+        const tokenRequest = jest.fn().mockResolvedValue('MY_TOKEN')
+        OpenAPI.TOKEN = tokenRequest;
+        const result = await SimpleService.getCallWithoutParametersAndResponse();
+        expect(tokenRequest.mock.calls.length).toBe(1);
+        expect(result.headers.authorization).toBe('Bearer MY_TOKEN');
+    });
+
     it('complexService', async () => {
-        const {ComplexService} = require('./generated/v2/node/index.js');
+        const { ComplexService } = require('./generated/v2/node/index.js');
         const result = await ComplexService.complexTypes({
             first: {
                 second: {
diff --git a/test/e2e/v2.xhr.spec.js b/test/e2e/v2.xhr.spec.js
index 595f411b..590b226f 100644
--- a/test/e2e/v2.xhr.spec.js
+++ b/test/e2e/v2.xhr.spec.js
@@ -21,6 +21,18 @@ describe('v2.xhr', () => {
         await browser.stop();
     });
 
+    it('requests token', async () => {
+        const result = await browser.evaluate(async () => {
+            window.api.OpenAPI.TOKEN = new Promise(resolve => {
+                setTimeout(() => {
+                    resolve('MY_TOKEN');
+                }, 500);
+            });
+            return await window.api.SimpleService.getCallWithoutParametersAndResponse();
+        });
+        expect(result.headers.authorization).toBe('Bearer MY_TOKEN');
+    });
+
     it('complexService', async () => {
         const result = await browser.evaluate(async () => {
             return await window.api.ComplexService.complexTypes({
diff --git a/test/e2e/v3.babel.spec.js b/test/e2e/v3.babel.spec.js
index 6c877cc5..dd378882 100644
--- a/test/e2e/v3.babel.spec.js
+++ b/test/e2e/v3.babel.spec.js
@@ -21,8 +21,16 @@ describe('v3.fetch', () => {
         await browser.stop();
     });
 
-    it('runs', async () => {
-        expect(true).toBeTruthy();
+    it('requests token', async () => {
+        const result = await browser.evaluate(async () => {
+            window.api.OpenAPI.TOKEN = new Promise(resolve => {
+                setTimeout(() => {
+                    resolve('MY_TOKEN');
+                }, 500);
+            });
+            return await window.api.SimpleService.getCallWithoutParametersAndResponse();
+        });
+        expect(result.headers.authorization).toBe('Bearer MY_TOKEN');
     });
 
     it('complexService', async () => {
diff --git a/test/e2e/v3.fetch.spec.js b/test/e2e/v3.fetch.spec.js
index b5d45ba6..e3df5a4b 100644
--- a/test/e2e/v3.fetch.spec.js
+++ b/test/e2e/v3.fetch.spec.js
@@ -21,8 +21,16 @@ describe('v3.fetch', () => {
         await browser.stop();
     });
 
-    it('runs', async () => {
-        expect(true).toBeTruthy();
+    it('requests token', async () => {
+        const result = await browser.evaluate(async () => {
+            window.api.OpenAPI.TOKEN = new Promise(resolve => {
+                setTimeout(() => {
+                    resolve('MY_TOKEN');
+                }, 500);
+            });
+            return await window.api.SimpleService.getCallWithoutParametersAndResponse();
+        });
+        expect(result.headers.authorization).toBe('Bearer MY_TOKEN');
     });
 
     it('complexService', async () => {
diff --git a/test/e2e/v3.node.spec.js b/test/e2e/v3.node.spec.js
index 7b026e65..26e2fbe8 100644
--- a/test/e2e/v3.node.spec.js
+++ b/test/e2e/v3.node.spec.js
@@ -17,8 +17,17 @@ describe('v3.node', () => {
         await server.stop();
     });
 
+    it('requests token', async () => {
+        const { OpenAPI, SimpleService } = require('./generated/v2/node/index.js');
+        const tokenRequest = jest.fn().mockResolvedValue('MY_TOKEN')
+        OpenAPI.TOKEN = tokenRequest;
+        const result = await SimpleService.getCallWithoutParametersAndResponse();
+        expect(tokenRequest.mock.calls.length).toBe(1);
+        expect(result.headers.authorization).toBe('Bearer MY_TOKEN');
+    });
+
     it('complexService', async () => {
-        const {ComplexService} = require('./generated/v3/node/index.js');
+        const { ComplexService } = require('./generated/v3/node/index.js');
         const result = await ComplexService.complexTypes({
             first: {
                 second: {
diff --git a/test/e2e/v3.xhr.spec.js b/test/e2e/v3.xhr.spec.js
index 1cad0068..3c1f4324 100644
--- a/test/e2e/v3.xhr.spec.js
+++ b/test/e2e/v3.xhr.spec.js
@@ -21,6 +21,18 @@ describe('v3.xhr', () => {
         await browser.stop();
     });
 
+    it('requests token', async () => {
+        const result = await browser.evaluate(async () => {
+            window.api.OpenAPI.TOKEN = new Promise(resolve => {
+                setTimeout(() => {
+                    resolve('MY_TOKEN');
+                }, 500);
+            });
+            return await window.api.SimpleService.getCallWithoutParametersAndResponse();
+        });
+        expect(result.headers.authorization).toBe('Bearer MY_TOKEN');
+    });
+
     it('complexService', async () => {
         const result = await browser.evaluate(async () => {
             return await window.api.ComplexService.complexTypes({