diff --git a/CHANGES b/CHANGES
index 40dd31768..b39b2ac47 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2274,3 +2274,5 @@
 * import all boxdata settings into the database
 * volumes: generate systemd mount configs based on type
 * postgresql: set max conn limit per db
+* ubuntu 16: add alert about EOL
+
diff --git a/src/cloudron.js b/src/cloudron.js
index 07e33d431..750fb6695 100644
--- a/src/cloudron.js
+++ b/src/cloudron.js
@@ -167,6 +167,10 @@ function runStartupTasks() {
 function getConfig(callback) {
     assert.strictEqual(typeof callback, 'function');
 
+    const release = safe.fs.readFileSync('/etc/lsb-release', 'utf-8');
+    if (release === null) return callback(new BoxError(BoxError.FS_ERROR, safe.error.message));
+    const ubuntuVersion = release.match(/DISTRIB_DESCRIPTION="(.*)"/)[1];
+
     settings.getAll(function (error, allSettings) {
         if (error) return callback(error);
 
@@ -178,6 +182,7 @@ function getConfig(callback) {
             adminFqdn: settings.dashboardFqdn(),
             mailFqdn: settings.mailFqdn(),
             version: constants.VERSION,
+            ubuntuVersion,
             isDemo: settings.isDemo(),
             cloudronName: allSettings[settings.CLOUDRON_NAME_KEY],
             footer: branding.renderFooter(allSettings[settings.FOOTER_KEY] || constants.FOOTER),
@@ -209,7 +214,8 @@ function runSystemChecks(callback) {
 
     async.parallel([
         checkMailStatus,
-        checkRebootRequired
+        checkRebootRequired,
+        checkUbuntuVersion
     ], callback);
 }
 
@@ -237,6 +243,14 @@ function checkRebootRequired(callback) {
     });
 }
 
+function checkUbuntuVersion(callback) {
+    assert.strictEqual(typeof callback, 'function');
+
+    const isXenial = fs.readFileSync('/etc/lsb-release', 'utf-8').includes('16.04');
+
+    if (isXenial) notifications.alert(notifications.ALERT_UPDATE_UBUNTU, 'Ubuntu Upgrade Required', 'Ubuntu 16.04 has reached end of life and will not receive security and maintenance updates. Please follow https://docs.cloudron.io/guides/upgrade-ubuntu-18/ to upgrade to Ubuntu 18 at the earliest.', callback);
+}
+
 function getLogs(unit, options, callback) {
     assert.strictEqual(typeof unit, 'string');
     assert(options && typeof options === 'object');
diff --git a/src/notifications.js b/src/notifications.js
index 86cafee1e..da2f34bb1 100644
--- a/src/notifications.js
+++ b/src/notifications.js
@@ -10,12 +10,12 @@ exports = module.exports = {
     appUpdatesAvailable,
     boxUpdateAvailable,
 
-    // NOTE: if you add an alert, be sure to add title below
     ALERT_BACKUP_CONFIG: 'backupConfig',
     ALERT_DISK_SPACE: 'diskSpace',
     ALERT_MAIL_STATUS: 'mailStatus',
     ALERT_REBOOT: 'reboot',
     ALERT_BOX_UPDATE: 'boxUpdate',
+    ALERT_UPDATE_UBUNTU: 'ubuntuUpdate',
 
     alert,
 
@@ -23,7 +23,7 @@ exports = module.exports = {
     _add: add
 };
 
-let apps = require('./apps.js'),
+const apps = require('./apps.js'),
     assert = require('assert'),
     async = require('async'),
     auditSource = require('./auditsource.js'),