diff --git a/letsencrypt/renewer.py b/letsencrypt/renewer.py
index 1c9cddc95..e00fe5532 100644
--- a/letsencrypt/renewer.py
+++ b/letsencrypt/renewer.py
@@ -70,6 +70,7 @@ def renew(cert, old_version):
     #      was an int, not a str)
     config.rsa_key_size = int(config.rsa_key_size)
     config.dvsni_port = int(config.dvsni_port)
+    config.namespace.simple_http_port = int(config.namespace.simple_http_port)
     zope.component.provideUtility(config)
     try:
         authenticator = plugins[renewalparams["authenticator"]]
diff --git a/letsencrypt/tests/renewer_test.py b/letsencrypt/tests/renewer_test.py
index 6941e084c..518332a94 100644
--- a/letsencrypt/tests/renewer_test.py
+++ b/letsencrypt/tests/renewer_test.py
@@ -625,6 +625,7 @@ class RenewableCertTests(BaseRenewableCertTest):
         self.test_rc.configfile["renewalparams"]["server"] = "acme.example.com"
         self.test_rc.configfile["renewalparams"]["authenticator"] = "fake"
         self.test_rc.configfile["renewalparams"]["dvsni_port"] = "4430"
+        self.test_rc.configfile["renewalparams"]["simple_http_port"] = "1234"
         self.test_rc.configfile["renewalparams"]["account"] = "abcde"
         mock_auth = mock.MagicMock()
         mock_pd.PluginsRegistry.find_all.return_value = {"apache": mock_auth}