diff --git a/services/web/frontend/js/features/pdf-preview/util/pdf-js-versions.js b/services/web/frontend/js/features/pdf-preview/util/pdf-js-versions.js
index a8dbdd89f1..61831eb1d4 100644
--- a/services/web/frontend/js/features/pdf-preview/util/pdf-js-versions.js
+++ b/services/web/frontend/js/features/pdf-preview/util/pdf-js-versions.js
@@ -9,7 +9,7 @@ import { createWorker } from '../../../utils/worker'
 async function importPDFJS31() {
   const cMapUrl = '/js/pdfjs-dist31/cmaps/'
   const standardFontDataUrl = '/fonts/pdfjs-dist31/'
-  const imageResourcesPath = '/images/pdfjs-dist31'
+  const imageResourcesPath = '/images/pdfjs-dist31/'
 
   const [PDFJS, PDFJSViewer] = await Promise.all([
     import('pdfjs-dist31/legacy/build/pdf'),
@@ -35,7 +35,7 @@ async function importPDFJS31() {
 async function importPDFJS213() {
   const cMapUrl = '/js/pdfjs-dist213/cmaps/'
   const standardFontDataUrl = '/fonts/pdfjs-dist213/'
-  const imageResourcesPath = '/images/pdfjs-dist213'
+  const imageResourcesPath = '/images/pdfjs-dist213/'
 
   const [PDFJS, PDFJSViewer] = await Promise.all([
     import('pdfjs-dist213/legacy/build/pdf'),