diff --git a/setup.py b/setup.py
index 3b79f07..6df4f74 100644
--- a/setup.py
+++ b/setup.py
@@ -20,6 +20,7 @@
     install_requires.extend([
         'argparse',
         'mock<1.1.0',
+        'ordereddict',
     ])
 else:
     install_requires.extend([
diff --git a/simp_le.py b/simp_le.py
index 671c702..8b10842 100755
--- a/simp_le.py
+++ b/simp_le.py
@@ -21,6 +21,10 @@
 import abc
 import argparse
 import collections
+try:
+    from collections import OrderedDict  # pylint: disable=import-error
+except ImportError:
+    from ordereddict import OrderedDict  # pylint: disable=import-error
 import contextlib
 import datetime
 import doctest
@@ -1270,7 +1274,7 @@ def new_data(args, existing):
 
     client = registered_client(args, existing.account_key)
 
-    authorizations = dict(
+    authorizations = OrderedDict(
         (vhost.name, client.request_domain_challenges(
             vhost.name, new_authz_uri=client.directory.new_authz))
         for vhost in args.vhosts