diff --git a/util/vm/build.py b/util/vm/build.py
index e8cfd92..0bb56a8 100755
--- a/util/vm/build.py
+++ b/util/vm/build.py
@@ -70,10 +70,10 @@ isoURLs = {
     'ubuntu-12.04.5-server-amd64.iso',
     'trusty32server':
     'http://mirrors.kernel.org/ubuntu-releases/14.04/'
-    'ubuntu-14.04.3-server-i386.iso',
+    'ubuntu-14.04.4-server-i386.iso',
     'trusty64server':
     'http://mirrors.kernel.org/ubuntu-releases/14.04/'
-    'ubuntu-14.04.3-server-amd64.iso',
+    'ubuntu-14.04.4-server-amd64.iso',
     'wily32server':
     'http://mirrors.kernel.org/ubuntu-releases/15.10/'
     'ubuntu-15.10-server-i386.iso',