diff --git a/src/Sage.ts b/src/Sage.ts
index b41ddf4..1b62caf 100644
--- a/src/Sage.ts
+++ b/src/Sage.ts
@@ -30,6 +30,7 @@ import { createReadStream } from 'node:fs';
 import { SageConfig } from './SageConfig.js';
 import { SageServer } from './SageServer.js';
 import { SageAssertException } from './SageAssertException.js';
+import { IncomingHttpHeaders } from 'undici/types/header.js';
 
 /**
  * Greetings, I'm Sage - a chainable HTTP Testing Assistant.
@@ -123,13 +124,26 @@ export class Sage<T> {
    * Sets a header for the request.
    * Consider using this at the end of the chain if you want to override any of the defaults.
    * @param key
-   * @param value
    */
-  set(key: string, value: string | string[]): this {
+  set(key: IncomingHttpHeaders): this;
+  set(key: string, value: string | string[]): this;
+  set(key: string, value: string): this;
+  set(key: string | IncomingHttpHeaders, value?: string | string[]): this {
     if (!this.request.headers) {
       this.request.headers = {};
     }
 
+    if (typeof key === 'object' && value === undefined) {
+      this.request.headers = key;
+      return this;
+    }
+
+    if (value === undefined || typeof key === 'object') {
+      throw new SageException(
+        'When setting headers one by one, both key and value are required'
+      );
+    }
+
     value = wrapArray(value);
 
     // If already an array
diff --git a/test/request.spec.ts b/test/request.spec.ts
index d07ce1c..b811767 100644
--- a/test/request.spec.ts
+++ b/test/request.spec.ts
@@ -432,6 +432,7 @@ describe('request', () => {
         } as SageHttpResponse);
       });
     });
+
     describe('application/json', () => {
       it('should properly call sage assistant and respond in expected format', async () => {
         const res = await request(expressApp)
@@ -484,6 +485,7 @@ describe('request', () => {
         });
       });
     });
+
     describe('redirects', () => {
       it('should properly operate with redirects', async () => {
         const res = await request(expressApp).get('/redirect');
@@ -512,6 +514,7 @@ describe('request', () => {
         });
       });
     });
+
     describe('header', () => {
       it('should set and pass a single header', async () => {
         const res = await request(expressApp)
@@ -575,7 +578,24 @@ describe('request', () => {
           }
         } as SageHttpResponse);
       });
+
+      it('should accept objects', async () => {
+        const res = await request(expressApp).post('/ping-pong').set({
+          'x-custom-header': 'custom-value1',
+          'x-custom-header2': 'custom-value2'
+        });
+
+        expect(res).toMatchObject({
+          body: {
+            reqHeaders: {
+              'x-custom-header': 'custom-value1',
+              'x-custom-header2': 'custom-value2'
+            }
+          }
+        } as SageHttpResponse);
+      });
     });
+
     describe('cookies', () => {
       it('should parse cookies properly for response', async () => {
         const res = await request(expressApp).get('/cookie');
@@ -1005,6 +1025,22 @@ describe('request', () => {
           }
         } as SageHttpResponse);
       });
+
+      it('should accept objects', async () => {
+        const res = await request(expressApp).post('/ping-pong').set({
+          'x-custom-header': 'custom-value1',
+          'x-custom-header2': 'custom-value2'
+        });
+
+        expect(res).toMatchObject({
+          body: {
+            reqHeaders: {
+              'x-custom-header': 'custom-value1',
+              'x-custom-header2': 'custom-value2'
+            }
+          }
+        } as SageHttpResponse);
+      });
     });
 
     describe('cookies', () => {