diff --git a/main.go b/main.go
index b1e1cee..821a5c8 100644
--- a/main.go
+++ b/main.go
@@ -1,9 +1,7 @@
 package main
 
 import (
-	"fmt"
 	"io/ioutil"
-	"net/http"
 	"net/url"
 	"os"
 	"strings"
@@ -11,7 +9,6 @@ import (
 
 	"github.com/a8m/mark"
 	"github.com/docopt/docopt-go"
-	"github.com/fatih/color"
 	"golang.org/x/net/html"
 )
 
@@ -37,41 +34,11 @@ func main() {
 		panic(err)
 	}
 
-	checkURLs(extractURLs(n), args["--verbose"].(bool))
-}
-
-func checkURLs(ss []string, verbose bool) {
-	client := &http.Client{Timeout: 5 * time.Second}
-	bs := make(chan bool, len(ss))
-
-	for _, s := range ss {
-		go checkURL(client, s, bs, verbose)
-	}
-
-	ok := true
-
-	for i := 0; i < len(ss); i++ {
-		ok = ok && <-bs
-	}
-
-	if !ok {
+	if !newURLChecker(5*time.Second, args["--verbose"].(bool)).CheckMany(extractURLs(n)) {
 		os.Exit(1)
 	}
 }
 
-func checkURL(client *http.Client, s string, bs chan bool, verbose bool) {
-	_, err := client.Get(s)
-
-	if s := color.New(color.FgCyan).SprintFunc()(s); err != nil {
-		printToStderr(
-			color.New(color.FgRed).SprintFunc()("ERROR") + "\t" + s + "\t" + err.Error())
-	} else if err == nil && verbose {
-		printToStderr(color.New(color.FgGreen).SprintFunc()("OK") + "\t" + s)
-	}
-
-	bs <- err == nil
-}
-
 func extractURLs(n *html.Node) []string {
 	ss := make(map[string]bool)
 	ns := make([]*html.Node, 0, 1024)
@@ -99,16 +66,6 @@ func extractURLs(n *html.Node) []string {
 	return stringSetToSlice(ss)
 }
 
-func stringSetToSlice(s2b map[string]bool) []string {
-	ss := make([]string, 0, len(s2b))
-
-	for s := range s2b {
-		ss = append(ss, s)
-	}
-
-	return ss
-}
-
 func isURL(s string) bool {
 	u, err := url.Parse(s)
 	return err == nil && (u.Scheme == "http" || u.Scheme == "https")
@@ -117,10 +74,10 @@ func isURL(s string) bool {
 func getArgs() map[string]interface{} {
 	usage := `Link checker for Markdown and HTML
 
-Usage:
+	Usage:
 	linkcheck [-v] <filename>
 
-Options:
+	Options:
 	-v, --verbose  Be verbose`
 
 	args, err := docopt.Parse(usage, nil, true, "linkcheck", true)
@@ -131,7 +88,3 @@ Options:
 
 	return args
 }
-
-func printToStderr(xs ...interface{}) {
-	fmt.Fprintln(os.Stderr, xs...)
-}
diff --git a/url_checker.go b/url_checker.go
index 80f8b73..d6f4f53 100644
--- a/url_checker.go
+++ b/url_checker.go
@@ -29,13 +29,13 @@ func (c urlChecker) Check(s string) bool {
 	return err == nil
 }
 
-func (c urlChecker) CheckMany(ss []string) {
+func (c urlChecker) CheckMany(ss []string) bool {
 	bs := make(chan bool, len(ss))
 
 	for _, s := range ss {
-		go func() {
-			bs <- c.Check()
-		}()
+		go func(s string) {
+			bs <- c.Check(s)
+		}(s)
 	}
 
 	ok := true
diff --git a/utils.go b/utils.go
new file mode 100644
index 0000000..988ee66
--- /dev/null
+++ b/utils.go
@@ -0,0 +1,20 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func stringSetToSlice(s2b map[string]bool) []string {
+	ss := make([]string, 0, len(s2b))
+
+	for s := range s2b {
+		ss = append(ss, s)
+	}
+
+	return ss
+}
+
+func printToStderr(xs ...interface{}) {
+	fmt.Fprintln(os.Stderr, xs...)
+}