diff --git a/README.md b/README.md
index c9329ef..6fe4940 100644
--- a/README.md
+++ b/README.md
@@ -36,42 +36,44 @@ For more information, please refer to <http://unlicense.org>
 
 ## Example
 
-	package main
-
-	import (
-		"github.com/vbsw/glut"
-	)
-
-	func main() {
-		glut.Init()
-		glut.InitDisplayMode(glut.SINGLE | glut.RGBA)
-		glut.InitWindowSize(640, 480)
-		glut.CreateWindow("Testing GLUT binding for Go");
-		glut.ReshapeFunc(reshape)
-		glut.DisplayFunc(display)
-		glut.KeyboardFunc(keyboard)
-		glut.MainLoop()
-	}
-
-	func reshape(width, height int) {
-		println("reshape")
-	}
-
-	func display() {
-		println("display")
-	}
-
-	func keyboard(key uint8, x, y int) {
-		if key==27 { // escape
-			glut.DestroyWindow(glut.GetWindow())
+```golang
+package main
+
+import (
+	"github.com/vbsw/glut"
+)
+
+func main() {
+	glut.Init()
+	glut.InitDisplayMode(glut.SINGLE | glut.RGBA)
+	glut.InitWindowSize(640, 480)
+	glut.CreateWindow("Testing GLUT binding for Go");
+	glut.ReshapeFunc(reshape)
+	glut.DisplayFunc(display)
+	glut.KeyboardFunc(keyboard)
+	glut.MainLoop()
+}
+
+func reshape(width, height int) {
+	println("reshape")
+}
+
+func display() {
+	println("display")
+}
+
+func keyboard(key uint8, x, y int) {
+	if key==27 { // escape
+		glut.DestroyWindow(glut.GetWindow())
+	} else {
+		if (glut.GetModifiers() & glut.ACTIVE_CTRL) > 0 {
+			println("key pressed: ctrl +", key)
 		} else {
-			if (glut.GetModifiers() & glut.ACTIVE_CTRL) > 0 {
-				println("key pressed: ctrl +", key)
-			} else {
-				println("key pressed:", key)
-			}
+			println("key pressed:", key)
 		}
 	}
+}
+```
 
 ## Installation