diff --git a/README.md b/README.md
index ff3457dc..a33c3bf8 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,27 @@ $ go get github.com/toshimaru/nyan
 $ nyan FILE
 ```
 
+## Available Themes
+
+- abap
+- dracula
+- emacs
+- monokai (default)
+- monokailight
+- pygments
+- solarized-dark
+- solarized-light
+- swapoff
+- vim
+
+You can see available color themes with the command:
+
+```
+$ nyan --list-themes
+```
+
+![Available Themes](https://user-images.githubusercontent.com/803398/67260792-42a91000-f4d8-11e9-9b92-19c0072987e3.png)
+
 ## What is nyan?
 
 `nyan` originates from [nyan-cat](http://www.nyan.cat/).
diff --git a/main.go b/main.go
index 89811a1e..db1a8a77 100644
--- a/main.go
+++ b/main.go
@@ -28,15 +28,15 @@ var rootCmd = &cobra.Command{
 	Short: "Colored cat command.",
 	Long:  "Colored cat command which supports syntax highlighting.",
 	Example: `$ nyan FILE
-$ nyan FILE1 FILE2
-$ nyan -t solarized-dark FILE1`,
+$ nyan FILE1 FILE2 FILE3
+$ nyan -t solarized-dark FILE`,
 	RunE: cmdMain,
 }
 
 func init() {
-	rootCmd.PersistentFlags().BoolVarP(&showVersion, "version", "v", false, `show version`)
-	rootCmd.PersistentFlags().StringVarP(&theme, "theme", "t", "monokai", fmt.Sprintf("color theme\navailable themes: %s", styles.Names()))
-	rootCmd.PersistentFlags().BoolVarP(&listThemes, "list-themes", "T", false, `list available themes`)
+	rootCmd.PersistentFlags().BoolVarP(&showVersion, "version", "v", false, `Show version`)
+	rootCmd.PersistentFlags().StringVarP(&theme, "theme", "t", "monokai", fmt.Sprintf("Set color theme for syntax highlighting\nAvailable themes: %s", styles.Names()))
+	rootCmd.PersistentFlags().BoolVarP(&listThemes, "list-themes", "T", false, `List available color themes`)
 }
 
 func main() {