diff --git a/index.html b/index.html
index 3376ac5..824f7f7 100644
--- a/index.html
+++ b/index.html
@@ -167,11 +167,14 @@ document.addEventListener("keydown", function (e) {
   if (e.key === "ArrowLeft") go(-1);
 });
 function downloadPptx() {
-  // Динамически загружаем библиотеку
-  var script = document.createElement('script');
-  script.src = 'https://cdn.jsdelivr.net/npm/pptxgenjs@3.12.0/dist/pptxgen.min.js';
-  script.onload = function() {
-    var p = new PptxGenJS();
+  if (typeof PptxGenJS === 'undefined') {
+    alert('Загрузка библиотеки... Повторите нажатие через 3 секунды');
+    var script = document.createElement('script');
+    script.src = 'https://cdn.jsdelivr.net/npm/pptxgenjs@3.12.0/dist/pptxgen.min.js';
+    document.head.appendChild(script);
+    return;
+  }
+  var p = new PptxGenJS();
   p.defineLayout({ name: "W", width: 13.33, height: 7.5 });
   p.layout = "W";
   SLIDES.forEach(function (s) {
@@ -181,9 +184,7 @@ function downloadPptx() {
     sl.addText(s.bullets.map(function (b) { return { text: b, options: { bullet: true, breakLine: true } }; }),
       { x: 0.9, y: 1.8, w: 11.5, h: 5.2, fontSize: 16, color: "E4E4E7", lineSpacingMultiple: 1.3 });
   });
-    p.writeFile({ fileName: "Juniper_RE_Complete_Guide.pptx" });
-  };
-  document.head.appendChild(script);
+  p.writeFile({ fileName: "Juniper_RE_Complete_Guide.pptx" });
 }
 render();
 </script>