diff --git a/drupalbox/ubuntu.json b/drupalbox/ubuntu.json
index b20c9ff..68e2dcd 100644
--- a/drupalbox/ubuntu.json
+++ b/drupalbox/ubuntu.json
@@ -1,8 +1,8 @@
 {
   "boot_command_prefix": "<enter><wait><f6><esc><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs><bs>",
-  "iso_checksum": "a06cd926f5855d4f21fb4bc9978a35312f815fbda0d0ef7fdc846861f4fc4600",
+  "iso_checksum": "0a03608988cfd2e50567990dc8be96fb3c501e198e2e6efcb846d89efc7b89f2",
   "iso_checksum_type": "sha256",
-  "iso_name": "ubuntu-16.04.3-server-amd64.iso",
-  "iso_url": "http://releases.ubuntu.com/16.04/ubuntu-16.04.3-server-amd64.iso",
+  "iso_name": "ubuntu-16.04.4-server-amd64.iso",
+  "iso_url": "http://releases.ubuntu.com/16.04/ubuntu-16.04.4-server-amd64.iso",
   "iso_path": "iso"
 }