diff --git a/src/apptask.js b/src/apptask.js
index 52332e475..32640a3cf 100644
--- a/src/apptask.js
+++ b/src/apptask.js
@@ -36,6 +36,7 @@ var addons = require('./addons.js'),
     ejs = require('ejs'),
     fs = require('fs'),
     manifestFormat = require('cloudron-manifestformat'),
+    mailer = require('./mailer.js'),
     mkdirp = require('mkdirp'),
     net = require('net'),
     os = require('os'),
@@ -47,6 +48,7 @@ var addons = require('./addons.js'),
     shell = require('./shell.js'),
     superagent = require('superagent'),
     sysinfo = require('./sysinfo.js'),
+    users = require('./users.js'),
     util = require('util'),
     _ = require('underscore');
 
@@ -780,6 +782,22 @@ function update(app, callback) {
         function (callback) {
             debugApp(app, 'updated');
             updateApp(app, { installationState: appdb.ISTATE_INSTALLED, installationProgress: '', health: null, updateConfig: null, updateTime: new Date() }, callback);
+        },
+
+        function notifyAdminsAboutUpdate(callback) {
+            if (app.installationState === appdb.ISTATE_PENDING_FORCE_UPDATE) return callback(null);
+
+            users.getAllAdmins(function (error, admins) {
+                if (error) {
+                    console.error('Failed to get admins to send update done notification:', error);
+                    return callback(); // this is not fatal
+                }
+
+                async.eachSeries(admins, (admin, done) => mailer.appUpdateDone(admin.email, app, done), function (error) {
+                    if (error) console.error('Failed to send update done notification:', error);
+                    callback();
+                });
+            });
         }
     ], function seriesDone(error) {
         if (error && error.backupError) {
diff --git a/src/mailer.js b/src/mailer.js
index 697c642c1..782e92262 100644
--- a/src/mailer.js
+++ b/src/mailer.js
@@ -6,6 +6,7 @@ exports = module.exports = {
     adminChanged: adminChanged,
     passwordReset: passwordReset,
     appUpdateAvailable: appUpdateAvailable,
+    appUpdateDone: appUpdateDone,
     sendDigest: sendDigest,
 
     sendInvite: sendInvite,
@@ -335,6 +336,35 @@ function appUpdateAvailable(mailTo, app, hasSubscription, info, callback) {
     });
 }
 
+function appUpdateDone(mailTo, app, callback) {
+    assert.strictEqual(typeof mailTo, 'string');
+    assert.strictEqual(typeof app, 'object');
+    assert.strictEqual(typeof callback, 'function');
+
+    getMailConfig(function (error, mailConfig) {
+        if (error) return debug('Error getting mail details:', error);
+
+        var templateData = {
+            webadminUrl: config.adminOrigin(),
+            app: app,
+            cloudronName: mailConfig.cloudronName,
+            cloudronAvatarUrl: config.adminOrigin() + '/api/v1/cloudron/avatar'
+        };
+
+        var templateDataText = JSON.parse(JSON.stringify(templateData));
+        templateDataText.format = 'text';
+
+        var mailOptions = {
+            from: mailConfig.notificationFrom,
+            to: mailTo,
+            subject: util.format('App %s was updated', app.fqdn),
+            text: render('app_update_done.ejs', templateDataText)
+        };
+
+        sendMail(mailOptions, callback);
+    });
+}
+
 function sendDigest(mailTo, info, callback) {
     assert.strictEqual(typeof mailTo, 'string');
     assert.strictEqual(typeof info, 'object');