diff --git a/src/modules/pdf.ts b/src/modules/pdf.ts
index 27a05aa..43752a6 100644
--- a/src/modules/pdf.ts
+++ b/src/modules/pdf.ts
@@ -6,7 +6,7 @@ export default function Pdf(params: Params, type = "hertzschlag") {
   ret.classList.add("iframe");
 
   const iframe = document.createElement("iframe");
-  iframe.src = `${json.baseUrl}${type}/pdf/compressed/${params.id}.pdf`;
+  iframe.src = `https://mozilla.github.io/pdf.js/web/viewer.html?file=${json.baseUrl}${type}/pdf/compressed/${params.id}.pdf`;
 
   ret.appendChild(iframe);
   return ret;