diff --git a/middleware.ts b/middleware.ts
index 867b6fb..afb06a9 100644
--- a/middleware.ts
+++ b/middleware.ts
@@ -43,7 +43,8 @@ export default async function middleware(req: NextRequest) {
 
 export const config = {
   // for these paths middleware will not be called
+  // `pdf.worker.min.mjs` is a web worker code used by pdf.js
   matcher: [
-    '/((?!api|_next/static|_next/image|.*\\.png$|.*\\.webm$).*)',
+    '/((?!api|_next/static|_next/image|.*\\.png$|pdf.worker.min.mjs$|.*\\.webm$).*)',
   ],
 };
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