diff --git a/arguments.go b/arguments.go
index 1960d17..2a9fef7 100644
--- a/arguments.go
+++ b/arguments.go
@@ -23,16 +23,18 @@ var defaultConcurrency = func() int {
 const usage = `Link checker for Markdown and HTML
 
 Usage:
-	liche [-c <num-requests>] [-t <timeout>] [-v] <filenames>...
+	liche [-c <num-requests>] [-r] [-t <timeout>] [-v] <filenames>...
 
 Options:
 	-c, --concurrency <num-requests>  Set max number of concurrent HTTP requests. [default: %v]
+	-r, --recursive  Search Markdown and HTML files recursively
 	-t, --timeout <timeout>  Set timeout for HTTP requests in seconds. Disabled by default.
 	-v, --verbose  Be verbose.`
 
 type arguments struct {
 	filenames   []string
 	concurrency int
+	recursive   bool
 	timeout     time.Duration
 	verbose     bool
 }
@@ -63,6 +65,7 @@ func getArgs() (arguments, error) {
 	return arguments{
 		args["<filenames>"].([]string),
 		int(c),
+		args["--recursive"].(bool),
 		time.Duration(t) * time.Second,
 		args["--verbose"].(bool),
 	}, nil
diff --git a/examples/options.feature b/examples/options.feature
index fdefe8e..b63306c 100644
--- a/examples/options.feature
+++ b/examples/options.feature
@@ -41,3 +41,12 @@ Feature: Options
     """
     When I successfully run `liche --concurrency 10 foo.md`
     Then the stdout should contain exactly ""
+
+  Scenario: Search files recursively
+    Given a directory named "foo"
+    And a file named "foo/bar.md" with:
+    """
+    [Google](https://google.com)
+    """
+    When I successfully run `liche --recursive -v foo`
+    Then the stderr should contain "OK"
diff --git a/extensions.go b/extensions.go
new file mode 100644
index 0000000..17757ed
--- /dev/null
+++ b/extensions.go
@@ -0,0 +1,14 @@
+package main
+
+import "path/filepath"
+
+var extensions = map[string]bool{
+	".htm":  true,
+	".html": true,
+	".md":   true,
+}
+
+func isMarkupFile(f string) bool {
+	_, ok := extensions[filepath.Ext(f)]
+	return ok
+}
diff --git a/extensions_test.go b/extensions_test.go
new file mode 100644
index 0000000..61d3e68
--- /dev/null
+++ b/extensions_test.go
@@ -0,0 +1,13 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIsMarkupFile(t *testing.T) {
+	for _, f := range []string{"foo.md", "foo.html", "foo.htm", "foo/bar.md"} {
+		assert.True(t, isMarkupFile(f))
+	}
+}
diff --git a/main.go b/main.go
index 415d4cb..4957d72 100644
--- a/main.go
+++ b/main.go
@@ -10,6 +10,15 @@ func main() {
 		os.Exit(1)
 	}
 
+	if args.recursive {
+		args.filenames, err = listFilesRecursively(args.filenames)
+
+		if err != nil {
+			printToStderr(err.Error())
+			os.Exit(1)
+		}
+	}
+
 	rc := make(chan fileResult, len(args.filenames))
 	s := newSemaphore(args.concurrency)
 	c := newFileChecker(args.timeout, s)
@@ -31,3 +40,23 @@ func main() {
 		os.Exit(1)
 	}
 }
+
+func listFilesRecursively(fs []string) ([]string, error) {
+	gs := []string{}
+
+	for _, f := range fs {
+		i, err := os.Stat(f)
+
+		if err != nil {
+			return nil, err
+		}
+
+		if i.IsDir() {
+			gs = append(gs, listFiles(f)...)
+		} else {
+			gs = append(gs, f)
+		}
+	}
+
+	return gs, nil
+}
diff --git a/utils.go b/utils.go
index b4b16bc..d9eaa80 100644
--- a/utils.go
+++ b/utils.go
@@ -3,6 +3,8 @@ package main
 import (
 	"fmt"
 	"os"
+	"path/filepath"
+	"regexp"
 
 	"github.com/kr/text"
 )
@@ -24,3 +26,33 @@ func printToStderr(xs ...interface{}) {
 func indent(s string) string {
 	return text.Indent(s, "\t")
 }
+
+func listFiles(d string) []string {
+	fc := make(chan string, 1024)
+
+	go func() {
+		filepath.Walk(d, func(p string, f os.FileInfo, err error) error {
+			b, err := regexp.MatchString("(^\\.)|(/\\.)", p)
+
+			if err != nil {
+				return err
+			}
+
+			if !f.IsDir() && !b && isMarkupFile(p) {
+				fc <- p
+			}
+
+			return nil
+		})
+
+		close(fc)
+	}()
+
+	fs := []string{}
+
+	for f := range fc {
+		fs = append(fs, f)
+	}
+
+	return fs
+}
diff --git a/utils_test.go b/utils_test.go
new file mode 100644
index 0000000..3d6ce34
--- /dev/null
+++ b/utils_test.go
@@ -0,0 +1,22 @@
+package main
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestListFiles(t *testing.T) {
+	fs := listFiles(".")
+
+	assert.NotEqual(t, 0, len(fs))
+
+	for _, f := range fs {
+		i, err := os.Stat(f)
+
+		assert.True(t, isMarkupFile(f))
+		assert.Equal(t, nil, err)
+		assert.False(t, i.IsDir())
+	}
+}