diff --git a/synapse/rest/client/room_upgrade_rest_servlet.py b/synapse/rest/client/room_upgrade_rest_servlet.py
new file mode 100644
index 0000000000..6d1b083acb
--- /dev/null
+++ b/synapse/rest/client/room_upgrade_rest_servlet.py
@@ -0,0 +1,88 @@
+# Copyright 2016 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import logging
+
+from synapse.api.errors import Codes, ShadowBanError, SynapseError
+from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
+from synapse.http.servlet import (
+ RestServlet,
+ assert_params_in_dict,
+ parse_json_object_from_request,
+)
+from synapse.util import stringutils
+
+from ._base import client_patterns
+
+logger = logging.getLogger(__name__)
+
+
+class RoomUpgradeRestServlet(RestServlet):
+ """Handler for room upgrade requests.
+
+ Handles requests of the form:
+
+ POST /_matrix/client/r0/rooms/$roomid/upgrade HTTP/1.1
+ Content-Type: application/json
+
+ {
+ "new_version": "2",
+ }
+
+ Creates a new room and shuts down the old one. Returns the ID of the new room.
+
+ Args:
+ hs (synapse.server.HomeServer):
+ """
+
+ PATTERNS = client_patterns(
+ # /rooms/$roomid/upgrade
+ "/rooms/(?P<room_id>[^/]*)/upgrade$"
+ )
+
+ def __init__(self, hs):
+ super().__init__()
+ self._hs = hs
+ self._room_creation_handler = hs.get_room_creation_handler()
+ self._auth = hs.get_auth()
+
+ async def on_POST(self, request, room_id):
+ requester = await self._auth.get_user_by_req(request)
+
+ content = parse_json_object_from_request(request)
+ assert_params_in_dict(content, ("new_version",))
+
+ new_version = KNOWN_ROOM_VERSIONS.get(content["new_version"])
+ if new_version is None:
+ raise SynapseError(
+ 400,
+ "Your homeserver does not support this room version",
+ Codes.UNSUPPORTED_ROOM_VERSION,
+ )
+
+ try:
+ new_room_id = await self._room_creation_handler.upgrade_room(
+ requester, room_id, new_version
+ )
+ except ShadowBanError:
+ # Generate a random room ID.
+ new_room_id = stringutils.random_string(18)
+
+ ret = {"replacement_room": new_room_id}
+
+ return 200, ret
+
+
+def register_servlets(hs, http_server):
+ RoomUpgradeRestServlet(hs).register(http_server)
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