diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9d6d43f..ad9e553 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # unreleased
 
+* Bumped minimum Go version to 1.17.
+* 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 config flags for backspace behavior.
 * Added `/rainbownotice` command to send a rainbow as a `m.notice` message.
 * Added support for editing messages in an external editor.
diff --git a/go.mod b/go.mod
index 3b2972f..6002cc3 100644
--- a/go.mod
+++ b/go.mod
@@ -24,7 +24,7 @@ require (
 	gopkg.in/toast.v1 v1.0.0-20180812000517-0a84660828b2
 	gopkg.in/vansante/go-ffprobe.v2 v2.0.3
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
-	maunium.net/go/mautrix v0.10.13-0.20220415172627-597a9560f721
+	maunium.net/go/mautrix v0.10.13-0.20220417095934-0eee489b6417
 	mvdan.cc/xurls/v2 v2.4.0
 )
 
diff --git a/go.sum b/go.sum
index bd560fd..394ace7 100644
--- a/go.sum
+++ b/go.sum
@@ -110,7 +110,7 @@ gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 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=
 mvdan.cc/xurls/v2 v2.4.0 h1:tzxjVAj+wSBmDcF6zBB7/myTy3gX9xvi8Tyr28AuQgc=
 mvdan.cc/xurls/v2 v2.4.0/go.mod h1:+GEjq9uNjqs8LQfM9nVnM8rff0OQ5Iash5rzX+N1CSg=
diff --git a/matrix/matrix.go b/matrix/matrix.go
index a7b012c..1db1587 100644
--- a/matrix/matrix.go
+++ b/matrix/matrix.go
@@ -202,7 +202,7 @@ func respondHTML(w http.ResponseWriter, status int, message string) {
 }
 
 func (c *Container) SingleSignOn() error {
-	loginURL := c.client.BuildURLWithQuery(mautrix.URLPath{"login", "sso", "redirect"}, map[string]string{
+	loginURL := c.client.BuildURLWithQuery(mautrix.ClientURLPath{"v3", "login", "sso", "redirect"}, map[string]string{
 		"redirectUrl": "http://localhost:29325",
 	})
 	err := open.Open(loginURL)
@@ -460,7 +460,7 @@ func (c *Container) HandlePreferences(source mautrix.EventSource, evt *event.Eve
 		debug.Print("Failed to parse updated preferences:", err)
 		return
 	}
-	debug.Print("Updated preferences:", orig, "->", c.config.Preferences)
+	debug.Printf("Updated preferences: %#v -> %#v", orig, c.config.Preferences)
 	if c.config.AuthCache.InitialSyncDone {
 		c.ui.HandleNewPreferences()
 	}
@@ -472,9 +472,8 @@ func (c *Container) Preferences() *config.UserPreferences {
 
 func (c *Container) SendPreferencesToMatrix() {
 	defer debug.Recover()
-	debug.Print("Sending updated preferences:", c.config.Preferences)
-	u := c.client.BuildURL("user", string(c.config.UserID), "account_data", AccountDataGomuksPreferences.Type)
-	_, err := c.client.MakeRequest("PUT", u, &c.config.Preferences, nil)
+	debug.Printf("Sending updated preferences: %#v", c.config.Preferences)
+	err := c.client.SetAccountData(AccountDataGomuksPreferences.Type, &c.config.Preferences)
 	if err != nil {
 		debug.Print("Failed to update preferences:", err)
 	}
diff --git a/matrix/uia-fallback.go b/matrix/uia-fallback.go
index 6b2e42a..f958ba1 100644
--- a/matrix/uia-fallback.go
+++ b/matrix/uia-fallback.go
@@ -97,7 +97,7 @@ func (c *Container) UIAFallback(loginType mautrix.AuthType, sessionID string) er
 	})
 	go server.ListenAndServe()
 	defer server.Close()
-	authURL := c.client.BuildURLWithQuery(mautrix.URLPath{"auth", loginType, "fallback", "web"}, map[string]string{
+	authURL := c.client.BuildURLWithQuery(mautrix.ClientURLPath{"v3", "auth", loginType, "fallback", "web"}, map[string]string{
 		"session": sessionID,
 	})
 	link := url.URL{