diff --git a/main.ts b/main.ts
index 576eda9..79a8df9 100644
--- a/main.ts
+++ b/main.ts
@@ -158,6 +158,7 @@ interface RenderRequest {
       height: number;
     };
     scale?: number;
+    extraHTTPHeaders?: Record<string, string>;
   };
 
   input: string;
@@ -170,6 +171,7 @@ async function doRender(request: RenderRequest): Promise<Uint8Array> {
     ...devices["Desktop Chrome"],
     viewport: request.device.viewport,
     deviceScaleFactor: request.device.scale ?? 1,
+    extraHTTPHeaders: request.device.extraHTTPHeaders ?? {},
   });
 
   const page = await context.newPage();