diff --git a/ironic/api/__init__.py b/ironic/api/__init__.py
index 1d6743d2e6..b9f95230b1 100644
--- a/ironic/api/__init__.py
+++ b/ironic/api/__init__.py
@@ -15,12 +15,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import flask.helpers
 from oslo.config import cfg
 
-from ironic.openstack.common import jsonutils
-
-flask.helpers.json = jsonutils
 
 API_SERVICE_OPTS = [
         cfg.StrOpt('ironic_api_bind_ip',
diff --git a/requirements.txt b/requirements.txt
index 2e5d470ca2..5f1faa780f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,6 +22,5 @@ python-keystoneclient>=0.2.0
 stevedore>=0.7
 websockify<0.4
 oslo.config>=1.1.0
-Flask==0.9
 pecan>=0.2.0
 wsme>=0.5b1