diff --git a/ceilometer/publisher/gnocchi.py b/ceilometer/publisher/gnocchi.py
index c635388a76..446e127eac 100644
--- a/ceilometer/publisher/gnocchi.py
+++ b/ceilometer/publisher/gnocchi.py
@@ -23,12 +23,12 @@ import uuid
 from gnocchiclient import exceptions as gnocchi_exc
 from keystoneauth1 import exceptions as ka_exceptions
 from oslo_log import log
-from oslo_serialization import jsonutils
 from oslo_utils import fnmatch
 from oslo_utils import timeutils
 import six
 import six.moves.urllib.parse as urlparse
 from stevedore import extension
+import ujson
 
 from ceilometer import declarative
 from ceilometer import gnocchi_client
@@ -502,7 +502,7 @@ class GnocchiPublisher(publisher.ConfigPublisherBase):
     def _search_resource(self, resource_type, query):
         try:
             return self._gnocchi.resource.search(
-                resource_type, jsonutils.loads(query))
+                resource_type, ujson.loads(query))
         except Exception:
             LOG.error("Fail to search resource type %{resource_type}s "
                       "with '%{query}s'",
diff --git a/ceilometer/publisher/http.py b/ceilometer/publisher/http.py
index 200f216c25..3ae93fa52a 100644
--- a/ceilometer/publisher/http.py
+++ b/ceilometer/publisher/http.py
@@ -14,11 +14,11 @@
 # under the License.
 
 from oslo_log import log
-from oslo_serialization import jsonutils
 from oslo_utils import strutils
 import requests
 from requests import adapters
 from six.moves.urllib import parse as urlparse
+import ujson
 
 from ceilometer import publisher
 
@@ -154,7 +154,7 @@ class HttpPublisher(publisher.ConfigPublisherBase):
         if not data:
             LOG.debug('Data set is empty!')
             return
-        data = jsonutils.dumps(data)
+        data = ujson.dumps(data)
         LOG.trace('Message: %s', data)
         try:
             res = self.session.post(self.target, data=data,
diff --git a/ceilometer/tests/unit/publisher/test_http.py b/ceilometer/tests/unit/publisher/test_http.py
index a5a53067d3..9226644cfb 100644
--- a/ceilometer/tests/unit/publisher/test_http.py
+++ b/ceilometer/tests/unit/publisher/test_http.py
@@ -260,5 +260,5 @@ class TestHttpPublisher(base.BaseTestCase):
         with mock.patch.object(requests.Session, 'post') as post:
             publisher.publish_events(self.event_data)
             self.assertEqual(
-                '[{"some": "aa"}, {"some": "aa"}, {"some": "aa"}]',
+                '[{"some":"aa"},{"some":"aa"},{"some":"aa"}]',
                 post.call_args[1]['data'])
diff --git a/ceilometer/tests/unit/publisher/test_utils.py b/ceilometer/tests/unit/publisher/test_utils.py
index 767dd5416b..ca9ee8ab2a 100644
--- a/ceilometer/tests/unit/publisher/test_utils.py
+++ b/ceilometer/tests/unit/publisher/test_utils.py
@@ -14,8 +14,8 @@
 # under the License.
 """Tests for ceilometer/publisher/utils.py
 """
-from oslo_serialization import jsonutils
 from oslotest import base
+import ujson
 
 from ceilometer.publisher import utils
 
@@ -104,7 +104,7 @@ class TestSignature(base.BaseTestCase):
         data['message_signature'] = utils.compute_signature(
             data,
             'not-so-secret')
-        jsondata = jsonutils.loads(jsonutils.dumps(data))
+        jsondata = ujson.loads(ujson.dumps(data))
         self.assertTrue(utils.verify_signature(jsondata, 'not-so-secret'))
 
     def test_verify_unicode_symbols(self):
@@ -114,7 +114,7 @@ class TestSignature(base.BaseTestCase):
         data['message_signature'] = utils.compute_signature(
             data,
             'not-so-secret')
-        jsondata = jsonutils.loads(jsonutils.dumps(data))
+        jsondata = ujson.loads(ujson.dumps(data))
         self.assertTrue(utils.verify_signature(jsondata, 'not-so-secret'))
 
     def test_verify_no_secret(self):
diff --git a/requirements.txt b/requirements.txt
index adaf1a32d5..a77b0e4e7d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ oslo.reports>=0.6.0 # Apache-2.0
 oslo.rootwrap>=2.0.0 # Apache-2.0
 pbr>=1.6 # Apache-2.0
 oslo.messaging>=5.12.0 # Apache-2.0
-oslo.serialization>=1.10.0 # Apache-2.0
+ujson
 oslo.utils>=3.5.0 # Apache-2.0
 pysnmp<5.0.0,>=4.2.3 # BSD
 python-glanceclient>=2.0.0 # Apache-2.0