diff --git a/assets/js/matomo-tracking.js b/assets/js/matomo-tracking.js
index d5eebc3..3f6cfdb 100644
--- a/assets/js/matomo-tracking.js
+++ b/assets/js/matomo-tracking.js
@@ -17,7 +17,6 @@ _paq.push(['enableLinkTracking']);
   var s = d.getElementsByTagName('script')[0];
 
   g.type = 'text/javascript';
-  g.async = true;
   g.defer = true;
   g.src = matomoUrl + '/piwik.js';
   s.parentNode.insertBefore(g, s);
diff --git a/layouts/partials/matomo-tracking.html b/layouts/partials/matomo-tracking.html
index 0231d43..7ff06ae 100644
--- a/layouts/partials/matomo-tracking.html
+++ b/layouts/partials/matomo-tracking.html
@@ -1,7 +1,7 @@
 {{- if .Site.IsServer -}}
 {{ $trackingScript := resources.Get "js/matomo-tracking.js" }}
-<script data-id="matomo-tracking" data-matomo-tracking-url='{{ $.Site.Params.matomo.url }}' data-matomo-tracking-id='{{ $.Site.Params.matomo.id }}' src="{{ $trackingScript.RelPermalink }}"></script>
+<script data-id="matomo-tracking" data-matomo-tracking-url='{{ $.Site.Params.matomo.url }}' data-matomo-tracking-id='{{ $.Site.Params.matomo.id }}' src="{{ $trackingScript.RelPermalink }}" defer></script>
 {{- else -}}
 {{ $trackingScript := resources.Get "js/matomo-tracking.js" | minify | fingerprint }}
-<script data-id="matomo-tracking" data-matomo-tracking-url='{{ $.Site.Params.matomo.url }}' data-matomo-tracking-id='{{ $.Site.Params.matomo.id }}' src="{{ $trackingScript.RelPermalink }}" {{ if not $.Site.Params.matomo.disableSRI }}integrity="{{ $trackingScript.Data.Integrity }}" crossorigin="anonymous"{{ end }}></script>
+<script data-id="matomo-tracking" data-matomo-tracking-url='{{ $.Site.Params.matomo.url }}' data-matomo-tracking-id='{{ $.Site.Params.matomo.id }}' src="{{ $trackingScript.RelPermalink }}" {{ if not $.Site.Params.matomo.disableSRI }}integrity="{{ $trackingScript.Data.Integrity }}" crossorigin="anonymous"{{ end }} defer></script>
 {{- end -}}
diff --git a/layouts/shortcodes/matomo-optout.html b/layouts/shortcodes/matomo-optout.html
index 5160f5f..1a40f78 100644
--- a/layouts/shortcodes/matomo-optout.html
+++ b/layouts/shortcodes/matomo-optout.html
@@ -3,17 +3,17 @@
 {{- $promisePolyfill := resources.Get "js/promise-polyfill.js" | minify | fingerprint -}}
 {{- $fetchJsonp := resources.Get "js/fetch-jsonp.js" -}}
 {{ $matomoOptout := resources.Get "js/matomo-optout.js" }}
-<script data-id="promise-polyfill" data-promise-polyfill-url="{{ $es6Promise.RelPermalink }}" src="{{ $promisePolyfill.RelPermalink }}" {{ if not $.Site.Params.matomo.disableSRI }}integrity="{{ $promisePolyfill.Data.Integrity }}" crossorigin="anonymous"{{ end }}></script>
+<script data-id="promise-polyfill" data-promise-polyfill-url="{{ $es6Promise.RelPermalink }}" src="{{ $promisePolyfill.RelPermalink }}" {{ if not $.Site.Params.matomo.disableSRI }}integrity="{{ $promisePolyfill.Data.Integrity }}" crossorigin="anonymous"{{ end }} defer></script>
 {{- if .Site.IsServer -}}
 {{ $matomoOptoutBundle := slice $fetchJsonp $matomoOptout | resources.Concat "js/matomo-optout.js" }}
-<script data-id="matomo-optout" data-matomo-optout-url="{{ $.Site.Params.matomo.url }}" src="{{ $matomoOptoutBundle.RelPermalink }}" async></script>
+<script data-id="matomo-optout" data-matomo-optout-url="{{ $.Site.Params.matomo.url }}" src="{{ $matomoOptoutBundle.RelPermalink }}" defer></script>
 {{- if ne $.Site.Params.matomo.stylefromassets false -}}
 {{ $matomoStyle := resources.Get "css/matomo-optout.css" }}
 <link rel="stylesheet" href="{{ $matomoStyle.RelPermalink }}">
 {{- end -}}
 {{- else -}}
 {{ $matomoOptoutBundle := slice $fetchJsonp $matomoOptout | resources.Concat "js/matomo-optout.js" | minify | fingerprint }}
-<script data-id="matomo-optout" data-matomo-optout-url="{{ $.Site.Params.matomo.url }}" src="{{ $matomoOptoutBundle.RelPermalink }}" {{ if not $.Site.Params.matomo.disableSRI }}integrity="{{ $matomoOptoutBundle.Data.Integrity }}" crossorigin="anonymous"{{ end }} async></script>
+<script data-id="matomo-optout" data-matomo-optout-url="{{ $.Site.Params.matomo.url }}" src="{{ $matomoOptoutBundle.RelPermalink }}" {{ if not $.Site.Params.matomo.disableSRI }}integrity="{{ $matomoOptoutBundle.Data.Integrity }}" crossorigin="anonymous"{{ end }} defer></script>
 {{- if ne $.Site.Params.matomo.stylefromassets false -}}
 {{ $matomoStyle := resources.Get "css/matomo-optout.css" | minify | fingerprint }}
 <link rel="stylesheet" href="{{ $matomoStyle.RelPermalink }}" {{ if not $.Site.Params.matomo.disableSRI }}integrity="{{ $matomoStyle.Data.Integrity }}" crossorigin="anonymous"{{ end }}>
diff --git a/src/js/matomo-tracking.js b/src/js/matomo-tracking.js
index 1896bff..2dfc934 100644
--- a/src/js/matomo-tracking.js
+++ b/src/js/matomo-tracking.js
@@ -19,7 +19,6 @@ _paq.push(['enableLinkTracking']);
   const s = d.getElementsByTagName('script')[0];
 
   g.type = 'text/javascript';
-  g.async = true;
   g.defer = true;
   g.src = `${matomoUrl}/piwik.js`;
   s.parentNode.insertBefore(g, s);