diff --git a/src/main/resources/static/js/multitool/PdfContainer.js b/src/main/resources/static/js/multitool/PdfContainer.js
index f1cc1061..5cb240d7 100644
--- a/src/main/resources/static/js/multitool/PdfContainer.js
+++ b/src/main/resources/static/js/multitool/PdfContainer.js
@@ -62,7 +62,7 @@ class PdfContainer {
             const files = e.target.files;
             this.fileName = files[0].name;
             for (var i=0; i < files.length; i++) {
-                this.addPdfFile(files[i], nextSiblingElement);
+                await this.addPdfFile(files[i], nextSiblingElement);
             }
 
             document.querySelectorAll(".enable-on-file").forEach(element => {