diff --git a/synapse/rest/client/v2_alpha/groups.py b/synapse/rest/client/v2_alpha/groups.py
index 009cd70737dba3ab25c3b13ce3a2c4c3b5196ac5..9b1116acee7b7a2d7f6424f7c4edc3252917e988 100644
--- a/synapse/rest/client/v2_alpha/groups.py
+++ b/synapse/rest/client/v2_alpha/groups.py
@@ -557,6 +557,33 @@ class GroupSelfAcceptInviteServlet(RestServlet):
         defer.returnValue((200, result))
 
 
+class GroupSelfUpdatePublicityServlet(RestServlet):
+    """Update whether we publicise a users membership of a group
+    """
+    PATTERNS = client_v2_patterns(
+        "/groups/(?P<group_id>[^/]*)/self/update_publicity$"
+    )
+
+    def __init__(self, hs):
+        super(GroupSelfUpdatePublicityServlet, self).__init__()
+        self.auth = hs.get_auth()
+        self.clock = hs.get_clock()
+        self.store = hs.get_datastore()
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, group_id):
+        requester = yield self.auth.get_user_by_req(request)
+        requester_user_id = requester.user.to_string()
+
+        content = parse_json_object_from_request(request)
+        publicise = content["publicise"]
+        yield self.store.update_group_publicity(
+            group_id, requester_user_id, publicise,
+        )
+
+        defer.returnValue((200, {}))
+
+
 class GroupsForUserServlet(RestServlet):
     """Get all groups the logged in user is joined to
     """
@@ -598,4 +625,5 @@ def register_servlets(hs, http_server):
     GroupSummaryRoomsCatServlet(hs).register(http_server)
     GroupRoleServlet(hs).register(http_server)
     GroupRolesServlet(hs).register(http_server)
+    GroupSelfUpdatePublicityServlet(hs).register(http_server)
     GroupSummaryUsersRoleServlet(hs).register(http_server)
diff --git a/synapse/storage/group_server.py b/synapse/storage/group_server.py
index 31514f3cdba947f05d11c778ee4bdd1234f3725d..10e757e9759d698e9345b8d2e0eb14e133801f0f 100644
--- a/synapse/storage/group_server.py
+++ b/synapse/storage/group_server.py
@@ -835,6 +835,21 @@ class GroupServerStore(SQLBaseStore):
             desc="add_room_to_group",
         )
 
+    def update_group_publicity(self, group_id, user_id, publicise):
+        """Update whether the user is publicising their membership of the group
+        """
+        return self._simple_update_one(
+            table="local_group_membership",
+            keyvalues={
+                "group_id": group_id,
+                "user_id": user_id,
+            },
+            updatevalues={
+                "is_publicised": publicise,
+            },
+            desc="update_group_publicity"
+        )
+
     @defer.inlineCallbacks
     def register_user_group_membership(self, group_id, user_id, membership,
                                        is_admin=False, content={},