diff --git a/changelog.d/6585.feature b/changelog.d/6585.feature
new file mode 100644
index 000000000..ab2a85374
--- /dev/null
+++ b/changelog.d/6585.feature
@@ -0,0 +1 @@
+Advertise support for Client-Server API r0.6.0 and remove related unstable feature flags.
\ No newline at end of file
diff --git a/synapse/rest/client/versions.py b/synapse/rest/client/versions.py
index d90a6a890..0d668df0b 100644
--- a/synapse/rest/client/versions.py
+++ b/synapse/rest/client/versions.py
@@ -49,24 +49,10 @@ class VersionsRestServlet(RestServlet):
                     "r0.3.0",
                     "r0.4.0",
                     "r0.5.0",
+                    "r0.6.0",
                 ],
                 # as per MSC1497:
                 "unstable_features": {
-                    # as per MSC2190, as amended by MSC2264
-                    # to be removed in r0.6.0
-                    "m.id_access_token": True,
-                    # Advertise to clients that they need not include an `id_server`
-                    # parameter during registration or password reset, as Synapse now decides
-                    # itself which identity server to use (or none at all).
-                    #
-                    # This is also used by a client when they wish to bind a 3PID to their
-                    # account, but not bind it to an identity server, the endpoint for which
-                    # also requires `id_server`. If the homeserver is handling 3PID
-                    # verification itself, there is no need to ask the user for `id_server` to
-                    # be supplied.
-                    "m.require_identity_server": False,
-                    # as per MSC2290
-                    "m.separate_add_and_bind": True,
                     # Implements support for label-based filtering as described in
                     # MSC2326.
                     "org.matrix.label_based_filtering": True,