1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/rest/client/versions.py b/synapse/rest/client/versions.py
index d1d2e5f7e3..4b87ee978a 100644
--- a/synapse/rest/client/versions.py
+++ b/synapse/rest/client/versions.py
@@ -76,6 +76,7 @@ class VersionsRestServlet(RestServlet):
                     "v1.1",
                     "v1.2",
                     "v1.3",
+                    "v1.4",
                 ],
                 # as per MSC1497:
                 "unstable_features": {
@@ -113,6 +114,8 @@ class VersionsRestServlet(RestServlet):
                     "org.matrix.msc3882": self.config.experimental.msc3882_enabled,
                     # Adds support for remotely enabling/disabling pushers, as per MSC3881
                     "org.matrix.msc3881": self.config.experimental.msc3881_enabled,
+                    # Adds support for filtering /messages by event relation.
+                    "org.matrix.msc3874": self.config.experimental.msc3874_enabled,
                 },
             },
         )