diff --git a/Gopkg.lock b/Gopkg.lock
index 9c52b6f..2f886d2 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -24,21 +24,48 @@
   packages = ["."]
   revision = "a7fc80c8060c2544fe5d4dae465b584f8e9b4e27"
 
+[[projects]]
+  name = "github.com/microcosm-cc/bluemonday"
+  packages = ["."]
+  revision = "dafebb5b6ff2861a0d69af64991e10866c19be85"
+  version = "v1.0.0"
+
 [[projects]]
   name = "github.com/pkg/errors"
   packages = ["."]
   revision = "645ef00459ed84a119197bfb8d8205042c6df63d"
   version = "v0.8.0"
 
+[[projects]]
+  branch = "master"
+  name = "github.com/shurcooL/sanitized_anchor_name"
+  packages = ["."]
+  revision = "86672fcb3f950f35f2e675df2240550f2a50762f"
+
 [[projects]]
   name = "github.com/urfave/cli"
   packages = ["."]
   revision = "cfb38830724cc34fedffe9a2a29fb54fa9169cd1"
   version = "v1.20.0"
 
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/net"
+  packages = [
+    "html",
+    "html/atom"
+  ]
+  revision = "f4c29de78a2a91c00474a2e689954305c350adf9"
+
+[[projects]]
+  name = "gopkg.in/russross/blackfriday.v2"
+  packages = ["."]
+  revision = "cadec560ec52d93835bf2f15bd794700d3a2473b"
+  version = "v2.0.0"
+
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "e4283d82ea22e941f9ab4d2020b12f3721cd0235cb78cca670d2ae1105e148ef"
+  inputs-digest = "243a217f076aeb5fdc8b28a2a2f38884c3476409410f664e316cd92acf44d012"
   solver-name = "gps-cdcl"
   solver-version = 1
diff --git a/Gopkg.toml b/Gopkg.toml
index e8aad3d..b4a8662 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -17,3 +17,11 @@
 [prune]
   go-tests = true
   unused-packages = true
+
+[[constraint]]
+  name = "gopkg.in/russross/blackfriday.v2"
+  version = "2.0.0"
+
+[[constraint]]
+  name = "github.com/microcosm-cc/bluemonday"
+  version = "1.0.0"
diff --git a/plugin.go b/plugin.go
index a8d95bf..9971dbc 100644
--- a/plugin.go
+++ b/plugin.go
@@ -6,6 +6,8 @@ import (
 	"github.com/drone/drone-template-lib/template"
 	"github.com/matrix-org/gomatrix"
 	"github.com/pkg/errors"
+	"github.com/microcosm-cc/bluemonday"
+	"gopkg.in/russross/blackfriday.v2"
 )
 
 type (
@@ -74,7 +76,7 @@ func (p Plugin) Exec() error {
 		m.SetCredentials(r.UserID, r.AccessToken)
 	}
 
-	joined, err := m.JoinRoom(p.Config.RoomID, "", nil)
+	joined, err := m.JoinRoom(prepend("!", p.Config.RoomID), "", nil)
 
 	if err != nil {
 		return errors.Wrap(err, "failed to join room")
@@ -86,7 +88,18 @@ func (p Plugin) Exec() error {
 		return errors.Wrap(err, "failed to render template")
 	}
 
-	if _, err := m.SendNotice(joined.RoomID, message); err != nil {
+	formatted := bluemonday.UGCPolicy().SanitizeBytes(
+		blackfriday.Run([]byte(message)),
+	)
+
+	content := gomatrix.HTMLMessage{
+		Body: message,
+		MsgType: "m.notice",
+		Format: "org.matrix.custom.html",
+		FormattedBody: string(formatted),
+	}
+
+	if _, err := m.SendMessageEvent(joined.RoomID, "m.room.message", content); err != nil {
 		return errors.Wrap(err, "failed to submit message")
 	}