diff --git a/packer.atlas.json b/packer.atlas.json
index 72a5519..46a0667 100644
--- a/packer.atlas.json
+++ b/packer.atlas.json
@@ -89,9 +89,9 @@
       "guest_os_type": "Ubuntu_64",
       "headless": true,
       "http_directory": "preseeds",
-      "iso_urls": "http://releases.ubuntu.com/16.04/ubuntu-16.04.2-server-amd64.iso",
+      "iso_urls": "http://releases.ubuntu.com/16.04/ubuntu-16.04.3-server-amd64.iso",
       "iso_checksum_type": "sha256",
-      "iso_checksum": "737ae7041212c628de5751d15c3016058b0e833fdc32e7420209b76ca3d0a535",
+      "iso_checksum": "a06cd926f5855d4f21fb4bc9978a35312f815fbda0d0ef7fdc846861f4fc4600",
       "ssh_username": "{{user `user`}}",
       "ssh_password": "{{user `user`}}",
       "ssh_wait_timeout": "20m",
diff --git a/packer.local.json b/packer.local.json
index c1091b2..fa04b8f 100644
--- a/packer.local.json
+++ b/packer.local.json
@@ -73,9 +73,9 @@
       "guest_os_type": "Ubuntu_64",
       "headless": true,
       "http_directory": "preseeds",
-      "iso_urls": "http://releases.ubuntu.com/16.04/ubuntu-16.04.2-server-amd64.iso",
+      "iso_urls": "http://releases.ubuntu.com/16.04/ubuntu-16.04.3-server-amd64.iso",
       "iso_checksum_type": "sha256",
-      "iso_checksum": "737ae7041212c628de5751d15c3016058b0e833fdc32e7420209b76ca3d0a535",
+      "iso_checksum": "a06cd926f5855d4f21fb4bc9978a35312f815fbda0d0ef7fdc846861f4fc4600",
       "ssh_username": "{{user `user`}}",
       "ssh_password": "{{user `user`}}",
       "ssh_wait_timeout": "20m",