diff --git a/changedetectionio/blueprint/tags/templates/edit-tag.html b/changedetectionio/blueprint/tags/templates/edit-tag.html
index 89bbf2c98..e527ea52e 100644
--- a/changedetectionio/blueprint/tags/templates/edit-tag.html
+++ b/changedetectionio/blueprint/tags/templates/edit-tag.html
@@ -6,7 +6,7 @@
     const notification_base_url="{{url_for('ajax_callback_send_notification_test', mode="group-settings")}}";
 </script>
 
-<script src="{{url_for('static_content', group='js', filename='tabs.js')}}" ></script>
+<script src="{{url_for('static_content', group='js', filename='tabs.js')}}" defer></script>
 <script>
 
 /*{% if emailprefix %}*/
diff --git a/changedetectionio/templates/diff.html b/changedetectionio/templates/diff.html
index 79e5915bd..ecf05accf 100644
--- a/changedetectionio/templates/diff.html
+++ b/changedetectionio/templates/diff.html
@@ -63,7 +63,7 @@
     <a id="jump-next-diff" title="Jump to next difference">Jump</a>
 </div>
 
-<script src="{{url_for('static_content', group='js', filename='tabs.js')}}" ></script>
+<script src="{{url_for('static_content', group='js', filename='tabs.js')}}" defer></script>
 <div class="tabs">
     <ul>
         {% if last_error_text %}<li class="tab" id="error-text-tab"><a href="#error-text">Error Text</a></li> {% endif %}
diff --git a/changedetectionio/templates/edit.html b/changedetectionio/templates/edit.html
index 71b93f915..3b3dbbe26 100644
--- a/changedetectionio/templates/edit.html
+++ b/changedetectionio/templates/edit.html
@@ -2,7 +2,7 @@
 {% block content %}
 {% from '_helpers.html' import render_field, render_checkbox_field, render_button, render_time_schedule_form %}
 {% from '_common_fields.html' import render_common_settings_form %}
-<script src="{{url_for('static_content', group='js', filename='tabs.js')}}" ></script>
+<script src="{{url_for('static_content', group='js', filename='tabs.js')}}" defer></script>
 <script src="{{url_for('static_content', group='js', filename='vis.js')}}" defer></script>
 <script src="{{url_for('static_content', group='js', filename='global-settings.js')}}" defer></script>
 <script src="{{url_for('static_content', group='js', filename='scheduler.js')}}" defer></script>
diff --git a/changedetectionio/templates/import.html b/changedetectionio/templates/import.html
index 04f417894..52d878de3 100644
--- a/changedetectionio/templates/import.html
+++ b/changedetectionio/templates/import.html
@@ -1,7 +1,7 @@
 {% extends 'base.html' %}
 {% block content %}
 {% from '_helpers.html' import render_field %}
-<script src="{{url_for('static_content', group='js', filename='tabs.js')}}" ></script>
+<script src="{{url_for('static_content', group='js', filename='tabs.js')}}" defer></script>
 <div class="edit-form monospaced-textarea">
 
     <div class="tabs collapsable">
diff --git a/changedetectionio/templates/preview.html b/changedetectionio/templates/preview.html
index cc9706e06..6915da332 100644
--- a/changedetectionio/templates/preview.html
+++ b/changedetectionio/templates/preview.html
@@ -12,7 +12,7 @@
     <script src="{{url_for('static_content', group='js', filename='plugins.js')}}"></script>
     <script src="{{ url_for('static_content', group='js', filename='diff-overview.js') }}" defer></script>
     <script src="{{ url_for('static_content', group='js', filename='preview.js') }}" defer></script>
-    <script src="{{ url_for('static_content', group='js', filename='tabs.js') }}" ></script>
+    <script src="{{ url_for('static_content', group='js', filename='tabs.js') }}" defer></script>
     {% if versions|length >= 2 %}
         <div id="settings" style="text-align: center;">
             <form class="pure-form " action="" method="POST">
diff --git a/changedetectionio/templates/settings.html b/changedetectionio/templates/settings.html
index f0e9af9f5..e13bbe60c 100644
--- a/changedetectionio/templates/settings.html
+++ b/changedetectionio/templates/settings.html
@@ -9,7 +9,7 @@
     const email_notification_prefix=JSON.parse('{{emailprefix|tojson}}');
 {% endif %}
 </script>
-<script src="{{url_for('static_content', group='js', filename='tabs.js')}}" ></script>
+<script src="{{url_for('static_content', group='js', filename='tabs.js')}}" defer></script>
 <script src="{{url_for('static_content', group='js', filename='plugins.js')}}" defer></script>
 <script src="{{url_for('static_content', group='js', filename='notifications.js')}}" defer></script>
 <script src="{{url_for('static_content', group='js', filename='vis.js')}}" defer></script>