diff --git a/manuels/templates/manuels/add_book.html b/manuels/templates/manuels/add_book.html
index c311a95..e3d6f7e 100644
--- a/manuels/templates/manuels/add_book.html
+++ b/manuels/templates/manuels/add_book.html
@@ -109,6 +109,6 @@
 {% endblock %}
 
 {% block end_js %}
-    <script src="{% static 'manuels/no_book.js' %}"></script>
-    <script src="{% static 'manuels/fetch-isbn.js' %}"></script>
+    <script defer src="{% static 'manuels/no_book.js' %}"></script>
+    <script defer src="{% static 'manuels/fetch-isbn.js' %}"></script>
 {% endblock %}
\ No newline at end of file
diff --git a/manuels/templates/manuels/base.html b/manuels/templates/manuels/base.html
index 869fd3c..357360f 100644
--- a/manuels/templates/manuels/base.html
+++ b/manuels/templates/manuels/base.html
@@ -7,10 +7,6 @@
     <link rel="icon" type="image/png" href="data:;base64,iVBORw0KGgo=">
     <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
           integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
-
-    <script src="https://kit.fontawesome.com/350c07ee78.js"
-            integrity="sha384-IwFbZvLB3nqmwJikzn6JZAqNDTwjFfauT4djixzjaxmR030Fd2gx05kWWwBLwRYZ"
-            crossorigin="anonymous"></script>
 </head>
 <body>
 <nav class="navbar navbar-expand-lg navbar-light bg-light">
@@ -42,13 +38,17 @@
     {% endblock %}
 </div>
 
-<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"
+
+<script defer src="https://kit.fontawesome.com/350c07ee78.js"
+        integrity="sha384-IwFbZvLB3nqmwJikzn6JZAqNDTwjFfauT4djixzjaxmR030Fd2gx05kWWwBLwRYZ"
+        crossorigin="anonymous"></script>
+<script defer src="https://code.jquery.com/jquery-3.3.1.slim.min.js"
         integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
         crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"
+<script defer src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"
         integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"
         crossorigin="anonymous"></script>
-<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"
+<script defer src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"
         integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
         crossorigin="anonymous"></script>
 {% block end_js %}
