diff --git a/letsencrypt/cli.py b/letsencrypt/cli.py
index d8b1a6039..024f53d0b 100644
--- a/letsencrypt/cli.py
+++ b/letsencrypt/cli.py
@@ -807,12 +807,18 @@ def _restore_required_config_elements(config, renewalparams):
     # int-valued items to add if they're present
     for config_item in INT_CONFIG_ITEMS:
         if config_item in renewalparams and not _set_by_cli(config_item):
-            try:
-                value = int(renewalparams[config_item])
-                setattr(config.namespace, config_item, value)
-            except ValueError:
-                raise errors.Error(
-                    "Expected a numeric value for {0}".format(config_item))
+            config_value = renewalparams[config_item]
+            # the default value for http01_port was None during private beta
+            if config_item == "http01_port" and config_value == "None":
+                logger.info("updating legacy http01_port value")
+                int_value = flag_default("http01_port")
+            else:
+                try:
+                    int_value = int(config_value)
+                except ValueError:
+                    raise errors.Error(
+                        "Expected a numeric value for {0}".format(config_item))
+            setattr(config.namespace, config_item, int_value)
 
 
 def _restore_plugin_configs(config, renewalparams):
diff --git a/letsencrypt/tests/cli_test.py b/letsencrypt/tests/cli_test.py
index 64d6beaae..bfd3818c1 100644
--- a/letsencrypt/tests/cli_test.py
+++ b/letsencrypt/tests/cli_test.py
@@ -713,6 +713,12 @@ class CLITest(unittest.TestCase):  # pylint: disable=too-many-public-methods
         self._test_renew_common(renewalparams=renewalparams, error_expected=True,
                                 assert_oc_called=False)
 
+    def test_renew_with_nonetype_http01(self):
+        renewalparams = {'authenticator': 'webroot',
+                         'http01_port': 'None'}
+        self._test_renew_common(renewalparams=renewalparams, error_expected=False,
+                                assert_oc_called=True)
+
     def test_renew_with_bad_domain(self):
         renewalparams = {'authenticator': 'webroot'}
         names = ['*.example.com']