diff --git a/public/js/main.js b/public/js/main.js
index 30a49de..2a01c9b 100644
--- a/public/js/main.js
+++ b/public/js/main.js
@@ -207,16 +207,22 @@ function generatePDF(event) {
     const params = [];
     if (month) params.push(`month=${month}`);
     if (year) params.push(`year=${year}`);
-    
+
     if (params.length > 0) {
         url += params.join('&') + '&';
     }
-    
+
+    // loadPdfLibraries() is awaited here too (not only when the modal opens) so
+    // the autotable plugin is guaranteed to be attached before we build the doc.
+    // Without this, opening the modal and submitting before the plugin script
+    // finished loading would reach generatePdfDocument() with doc.autoTable
+    // still undefined ("doc.autoTable is not a function").
     Promise.all([
+        loadPdfLibraries(),
         fetch('/api/settings').then(res => res.json()),
         fetch(url).then(res => res.json())
     ])
-    .then(([settings, applications]) => {
+    .then(([_loaded, settings, applications]) => {
         generatePdfDocument(settings, applications, month, year);
         hideModal(pdfExportModal);
     })
@@ -603,7 +609,12 @@ function loadPdfLibraries() {
         // Check if already loading
         if (document.getElementById('jspdf-script')) {
             const checkLoaded = setInterval(() => {
-                if (window.jspdf && window.jspdf.jsPDF) {
+                // Wait for the autotable plugin too, not just jsPDF: jsPDF loads
+                // first (script1), the plugin second (script2). Resolving the
+                // moment jsPDF exists leaves doc.autoTable undefined if script2
+                // has not run yet.
+                if (window.jspdf && window.jspdf.jsPDF
+                    && typeof window.jspdf.jsPDF.API.autoTable === 'function') {
                     clearInterval(checkLoaded);
                     pdfLibrariesLoaded = true;
                     resolve();