diff --git a/upcloud_api/constants.py b/upcloud_api/constants.py
index 2c0cd14..c93d8a1 100644
--- a/upcloud_api/constants.py
+++ b/upcloud_api/constants.py
@@ -32,6 +32,7 @@ class OperatingSystems(object):
         'Ubuntu 12.04': '01000000-0000-4000-8000-000030030200',
         'Ubuntu 14.04': '01000000-0000-4000-8000-000030040200',
         'Ubuntu 16.04': '01000000-0000-4000-8000-000030060200',
+        'Ubuntu 18.04': '01000000-0000-4000-8000-000030080200',
         'CoreOS Stable 1068.8.0': '01000000-0000-4000-8000-000080010200',
         'Windows 2012': '01000000-0000-4000-8000-000010050200',
         'Windows 2016': '01000000-0000-4000-8000-000010060200',