diff --git a/index.ts b/index.ts
index e819d40..1c68ae0 100644
--- a/index.ts
+++ b/index.ts
@@ -13,7 +13,7 @@ app.post('/render', async (c) => {
 
     const body = await c.req.json().catch(() => null)
 
-    let extraArgs = ""
+    let extraArgs = "-b"
 
     let filename;
     let size;
@@ -35,7 +35,6 @@ app.post('/render', async (c) => {
 
         extraArgs += ` -W ${w} -H ${h}`;
     }   
-    extraArgs += " -b"
     if(body?.extraArgs) {
         if (typeof body.extraArgs !== 'string') {
             return c.text('extraArgs must be a string', 400)