diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3d6857e..229ab24 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+# unreleased
+
+* Switched from `/r0` to `/v3` paths everywhere.
+  * The new `v3` paths are implemented since Synapse 1.48, Dendrite 0.6.5,
+    and Conduit 0.4.0. Servers older than these are no longer supported.
+* Added new deferred backfill system to allow backfilling historical messages
+  later instead of doing everything at login.
+
 # v0.3.1 (2022-04-16)
 
 * Added emoji normalization for reactions in both directions to add/remove
diff --git a/go.mod b/go.mod
index 3d377f4..c6c34be 100644
--- a/go.mod
+++ b/go.mod
@@ -17,7 +17,7 @@ require (
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
 	maunium.net/go/mauflag v1.0.0
 	maunium.net/go/maulogger/v2 v2.3.2
-	maunium.net/go/mautrix v0.10.13-0.20220415172627-597a9560f721
+	maunium.net/go/mautrix v0.10.13-0.20220417095934-0eee489b6417
 )
 
 require (
diff --git a/go.sum b/go.sum
index 7feafd2..df713a1 100644
--- a/go.sum
+++ b/go.sum
@@ -199,5 +199,5 @@ maunium.net/go/mauflag v1.0.0 h1:YiaRc0tEI3toYtJMRIfjP+jklH45uDHtT80nUamyD4M=
 maunium.net/go/mauflag v1.0.0/go.mod h1:nLivPOpTpHnpzEh8jEdSL9UqO9+/KBJFmNRlwKfkPeA=
 maunium.net/go/maulogger/v2 v2.3.2 h1:1XmIYmMd3PoQfp9J+PaHhpt80zpfmMqaShzUTC7FwY0=
 maunium.net/go/maulogger/v2 v2.3.2/go.mod h1:TYWy7wKwz/tIXTpsx8G3mZseIRiC5DoMxSZazOHy68A=
-maunium.net/go/mautrix v0.10.13-0.20220415172627-597a9560f721 h1:QuCkJp2siYbXtZPStpYqPZ9Cz6yFCEVOGkBkmUchg7M=
-maunium.net/go/mautrix v0.10.13-0.20220415172627-597a9560f721/go.mod h1:zOor2zO/F10T/GbU67vWr0vnhLso88rlRr1HIrb1XWU=
+maunium.net/go/mautrix v0.10.13-0.20220417095934-0eee489b6417 h1:dEJ9MKQvd4v2Rk2W6EUiO1T6PrSWPsB/JQOHQn4H6X0=
+maunium.net/go/mautrix v0.10.13-0.20220417095934-0eee489b6417/go.mod h1:zOor2zO/F10T/GbU67vWr0vnhLso88rlRr1HIrb1XWU=
diff --git a/user.go b/user.go
index 46dbefa..5ed2c64 100644
--- a/user.go
+++ b/user.go
@@ -855,7 +855,7 @@ func (user *User) UpdateDirectChats(chats map[id.UserID][]id.RoomID) {
 	user.log.Debugln("Updating m.direct list on homeserver")
 	var err error
 	if user.bridge.Config.Homeserver.Asmux {
-		urlPath := intent.BuildBaseURL("_matrix", "client", "unstable", "com.beeper.asmux", "dms")
+		urlPath := intent.BuildClientURL("unstable", "com.beeper.asmux", "dms")
 		_, err = intent.MakeFullRequest(mautrix.FullRequest{
 			Method:      method,
 			URL:         urlPath,