1 files changed, 2 insertions, 3 deletions
diff --git a/synapse/storage/group_server.py b/synapse/storage/group_server.py
index da05ccb027..592d1b4c2a 100644
--- a/synapse/storage/group_server.py
+++ b/synapse/storage/group_server.py
@@ -14,15 +14,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from canonicaljson import json
+
 from twisted.internet import defer
 
 from synapse.api.errors import SynapseError
 
 from ._base import SQLBaseStore
 
-import simplejson as json
-
-
 # The category ID for the "default" category. We don't store as null in the
 # database to avoid the fun of null != null
 _DEFAULT_CATEGORY_ID = ""