diff --git a/Taskfile.yml b/Taskfile.yml
index 354a126..5891efb 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -2,9 +2,9 @@ version: '3'
 
 vars:
   DEBUG_PORT: 2345
-  REVEALJS_VERSION: 4.1.2
+  REVEALJS_VERSION: 4.2.1
   HIGHLIGHTJS_VERSION: 11.3.1
-  MERMAID_VERSION: 8.13.4
+  MERMAID_VERSION: 8.13.6
   BINARY_NAME: goveal
   OUT_DIR: ./out
   GO_BUILD_ARGS: -ldflags="-w -s"
@@ -98,7 +98,7 @@ tasks:
       - curl -L -o ./assets/reveal/plugin/mouse-pointer/mouse-pointer.js https://raw.githubusercontent.com/caiofcm/plugin-revealjs-mouse-pointer/master/mouse-pointer.js
       - rm -f ./assets/reveal/plugin/menu/{bower.json,CONTRIBUTING.md,LICENSE,package.json,README.md,.gitignore,gulpfile.js,package-lock.json}
       - curl -L https://github.com/highlightjs/highlight.js/archive/{{ .HIGHLIGHTJS_VERSION }}.tar.gz | tar -xvz --strip-components=3 -C ./assets/reveal/plugin/highlight --wildcards "*.css" highlight.js-{{ .HIGHLIGHTJS_VERSION }}/src/styles/
-      - curl -L https://github.com/mermaid-js/mermaid/archive/refs/tags/{{ .MERMAID_VERSION }}.tar.gz | tar -xvz -C ./assets/mermaid/ mermaid-{{ .MERMAID_VERSION }}/dist --strip-components=2
+      - curl -L https://registry.npmjs.org/mermaid/-/mermaid-{{ .MERMAID_VERSION }}.tgz | tar -xvz -C ./assets/mermaid/ package/dist --strip-components=2
 
   go-get-tool:
     vars:
diff --git a/cmd/goveal/serve.go b/cmd/goveal/serve.go
index c4fd3af..3d94658 100644
--- a/cmd/goveal/serve.go
+++ b/cmd/goveal/serve.go
@@ -2,10 +2,13 @@ package main
 
 import (
 	"encoding/hex"
+	"fmt"
 	"hash/fnv"
 	"net/http"
+	"os/exec"
 	"path"
 	"path/filepath"
+	"runtime"
 
 	"github.com/gofiber/fiber/v2"
 	"github.com/gofiber/template/html"
@@ -20,10 +23,18 @@ import (
 	"github.com/baez90/goveal/web"
 )
 
+const (
+	defaultListeningPort uint16 = 3000
+	defaultHost                 = "127.0.0.1"
+)
+
 var (
-	workingDir string
-	cfg        *config.Components
-	serveCmd   = &cobra.Command{
+	workingDir  string
+	cfg         *config.Components
+	host        string
+	port        uint16
+	openBrowser bool
+	serveCmd    = &cobra.Command{
 		Use:  "serve",
 		Args: cobra.ExactArgs(1),
 		RunE: func(_ *cobra.Command, args []string) (err error) {
@@ -47,6 +58,10 @@ var (
 						h := fnv.New32a()
 						return hex.EncodeToString(h.Sum([]byte(path.Base(fileName))))
 					}),
+				AppName:               "goveal",
+				GETOnly:               true,
+				DisableStartupMessage: true,
+				StreamRequestBody:     true,
 			})
 			hub := events.NewEventHub(
 				wdfs,
@@ -63,11 +78,38 @@ var (
 				return err
 			}
 
-			return app.Listen(":3000")
+			if openBrowser {
+				log.Info("Opening browser...")
+				openBrowserInBackground(fmt.Sprintf("http://%s:%d", host, port))
+			}
+
+			log.Infof("Listening on %s:%d", host, port)
+			return app.Listen(fmt.Sprintf("%s:%d", host, port))
 		},
 	}
 )
 
 func init() {
+	serveCmd.Flags().Uint16Var(&port, "port", defaultListeningPort, "port to listen on")
+	serveCmd.Flags().StringVar(&host, "host", defaultHost, "address/hostname to bind on")
+	serveCmd.Flags().BoolVar(&openBrowser, "open-browser", true, "Open browser when starting")
 	rootCmd.AddCommand(serveCmd)
 }
+
+func openBrowserInBackground(url string) {
+	var err error
+
+	switch runtime.GOOS {
+	case "linux":
+		err = exec.Command("xdg-open", url).Start()
+	case "windows":
+		err = exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
+	case "darwin":
+		err = exec.Command("open", url).Start()
+	default:
+		err = fmt.Errorf("unsupported platform")
+	}
+	if err != nil {
+		log.Warn(err)
+	}
+}
diff --git a/config/components.go b/config/components.go
index e9c2027..a7024c8 100644
--- a/config/components.go
+++ b/config/components.go
@@ -4,6 +4,8 @@ var defaults = map[string]interface{}{
 	"mermaid.theme":                       "forest",
 	"theme":                               "beige",
 	"codeTheme":                           "monokai",
+	"verticalSeparator":                   `\*\*\*`,
+	"horizontalSeparator":                 `---`,
 	"transition":                          TransitionNone,
 	"controlsLayout":                      ControlsLayoutEdges,
 	"controls":                            true,
diff --git a/examples/slides.md b/examples/slides.md
index f507a15..eecff37 100644
--- a/examples/slides.md
+++ b/examples/slides.md
@@ -91,7 +91,7 @@ for (var j = 0; j < i; j++) {
 ### Mermaid
 
 ```mermaid
-%%{init: {'theme': 'dark'}}%%
+%%{init: {'theme': 'neutral'}}%%
 flowchart LR
    a --> b & c--> d
 ```
@@ -101,7 +101,6 @@ flowchart LR
 ### The inadequacy of a non-highlighted being
 
 {line-numbers="1-2|3|4"}
-
 ```js
 let a = 1;
 let b = 2;