diff --git a/jodconverter-web/src/main/resources/static/pdfjs/web/viewer.js b/jodconverter-web/src/main/resources/static/pdfjs/web/viewer.js
index 6bd7cd94..71091f41 100644
--- a/jodconverter-web/src/main/resources/static/pdfjs/web/viewer.js
+++ b/jodconverter-web/src/main/resources/static/pdfjs/web/viewer.js
@@ -1897,7 +1897,7 @@ var validateFileURL = void 0;
       }
       var fileOrigin = new URL(file, window.location.href).origin;
       if (fileOrigin !== viewerOrigin) {
-        return base.endsWith('/') ? base : '/' + 'getCorsFile?urlPath=' + encodeURIComponent(file);
+        return (base.endsWith('/') ? base : base + '/') + 'getCorsFile?urlPath=' + encodeURIComponent(file);
       }
     } catch (ex) {
       var message = ex && ex.message;