diff --git a/common/head_tag.html b/common/head_tag.html
deleted file mode 100644
index c5ed128..0000000
--- a/common/head_tag.html
+++ /dev/null
@@ -1,49 +0,0 @@
-<script type="text/discourse-plugin" version="0.2">
-  api.onPageChange((url, title) => {
-    const currentUser = api.getCurrentUser();
-
-    if (settings.exclude_groups.trim() && currentUser) {
-      const excludedGroups = settings.exclude_groups.split(",").map(g => g.trim());
-      const currentUserGroups = currentUser.groups.map(g => g.name);
-      if (excludedGroups.filter(g => currentUserGroups.includes(g)).length) {
-        return;
-      }
-    }
-
-    window._paq = window._paq || [];
-    window._paq_loaded = window._paq_loaded || false;
-
-    if (!_paq_loaded) {
-      var u = `//${settings.host_url}/`;
-      _paq.push(['setTrackerUrl', u+'piwik.php']);
-      _paq.push(['setSiteId', settings.website_id]);
-      var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
-      g.type='text/javascript'; g.async=true; g.defer=true; g.src=u+'piwik.js'; s.parentNode.insertBefore(g,s);
-      _paq_loaded = true;
-    }
-
-    const userIdField = settings.user_id_tracking.trim();
-    if (userIdField && currentUser && currentUser[userIdField]) {
-      _paq.push(['setUserId', currentUser[userIdField]]);
-    }
-
-    if (settings.subdomain_tracking) {
-      const allDomains = "*" + document.domain.substring(document.domain.indexOf("."));
-      _paq.push(["setCookieDomain", allDomains]);
-      _paq.push(["setDomains", allDomains]);
-    }
-
-    if (settings.do_not_track) {
-        _paq.push(["setDoNotTrack", true]);
-    }
-
-    if (settings.disable_cookies) {
-        _paq.push(["disableCookies"]);
-    }
-
-    _paq.push(["setCustomUrl", url]);
-    _paq.push(["setDocumentTitle", title]);
-    _paq.push(["trackPageView"]);
-    _paq.push(['enableLinkTracking']);
-  });
-</script>
diff --git a/javascripts/discourse/api-initializers/init-theme.js b/javascripts/discourse/api-initializers/init-theme.js
new file mode 100644
index 0000000..afb183e
--- /dev/null
+++ b/javascripts/discourse/api-initializers/init-theme.js
@@ -0,0 +1,60 @@
+import { apiInitializer } from "discourse/lib/api";
+
+export default apiInitializer((api) => {
+  api.onPageChange((url, title) => {
+    const currentUser = api.getCurrentUser();
+
+    if (settings.exclude_groups.trim() && currentUser) {
+      const excludedGroups = settings.exclude_groups
+        .split(",")
+        .map((g) => g.trim());
+      const currentUserGroups = currentUser.groups.map((g) => g.name);
+      if (excludedGroups.filter((g) => currentUserGroups.includes(g)).length) {
+        return;
+      }
+    }
+
+    const _paq = (window._paq = window._paq || []);
+    window._paq_loaded = window._paq_loaded || false;
+
+    if (!window._paq_loaded) {
+      let u = `//${settings.host_url}/`;
+      _paq.push(["setTrackerUrl", u + "piwik.php"]);
+      _paq.push(["setSiteId", settings.website_id]);
+      let d = document,
+        g = d.createElement("script"),
+        s = d.getElementsByTagName("script")[0];
+      g.type = "text/javascript";
+      g.async = true;
+      g.defer = true;
+      g.src = u + "piwik.js";
+      s.parentNode.insertBefore(g, s);
+      window._paq_loaded = true;
+    }
+
+    const userIdField = settings.user_id_tracking.trim();
+    if (userIdField && currentUser && currentUser[userIdField]) {
+      _paq.push(["setUserId", currentUser[userIdField]]);
+    }
+
+    if (settings.subdomain_tracking) {
+      const allDomains =
+        "*" + document.domain.substring(document.domain.indexOf("."));
+      _paq.push(["setCookieDomain", allDomains]);
+      _paq.push(["setDomains", allDomains]);
+    }
+
+    if (settings.do_not_track) {
+      _paq.push(["setDoNotTrack", true]);
+    }
+
+    if (settings.disable_cookies) {
+      _paq.push(["disableCookies"]);
+    }
+
+    _paq.push(["setCustomUrl", url]);
+    _paq.push(["setDocumentTitle", title]);
+    _paq.push(["trackPageView"]);
+    _paq.push(["enableLinkTracking"]);
+  });
+});