diff --git a/lib/url.js b/lib/url.js
index e29243fb..0eb4a04a 100644
--- a/lib/url.js
+++ b/lib/url.js
@@ -1,11 +1,11 @@
 export function removeTrailingSlash(url) {
-  return url.length > 1 && url.endsWith('/') ? url.slice(0, -1) : url;
+  return url && url.length > 1 && url.endsWith('/') ? url.slice(0, -1) : url;
 }
 
 export function getDomainName(str) {
   try {
     return new URL(str).hostname;
-  } catch {
+  } catch (e) {
     return str;
   }
 }
diff --git a/package.json b/package.json
index 80bf5f9c..a6cca6bb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "umami",
-  "version": "0.19.0",
+  "version": "0.20.0",
   "description": "A simple, fast, website analytics alternative to Google Analytics. ",
   "author": "Mike Cao <mike@mikecao.com>",
   "license": "MIT",
diff --git a/tracker/index.js b/tracker/index.js
index a30a0220..f0ad78cd 100644
--- a/tracker/index.js
+++ b/tracker/index.js
@@ -1,6 +1,7 @@
 import 'promise-polyfill/src/polyfill';
 import 'unfetch/polyfill';
 import { post, hook, doNotTrack } from '../lib/web';
+import { removeTrailingSlash } from '../lib/url';
 
 (window => {
   const {
@@ -17,7 +18,10 @@ import { post, hook, doNotTrack } from '../lib/web';
   if (!script || (__DNT__ && doNotTrack())) return;
 
   const website = script.getAttribute('data-website-id');
-  const hostUrl = new URL(script.src).href.split('/').slice(0, -1).join('/');
+  const hostUrl = script.getAttribute('data-host-url');
+  const root = hostUrl
+    ? removeTrailingSlash(hostUrl)
+    : new URL(script.src).href.split('/').slice(0, -1).join('/');
   const screen = `${width}x${height}`;
   const listeners = [];
 
@@ -42,7 +46,7 @@ import { post, hook, doNotTrack } from '../lib/web';
       });
     }
 
-    return post(`${hostUrl}/api/collect`, {
+    return post(`${root}/api/collect`, {
       type,
       payload,
     });