diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 1ea5f00..9971974 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -13,6 +13,8 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-go@v2
+        with:
+          go-version: 1.17
       - run: go build
       - uses: golangci/golangci-lint-action@v2
         with:
diff --git a/command_test.go b/command_test.go
index 4f33ab2..67cd00e 100644
--- a/command_test.go
+++ b/command_test.go
@@ -2,7 +2,7 @@ package main
 
 import (
 	"bytes"
-	"io/ioutil"
+	"io"
 	"regexp"
 	"strings"
 	"testing"
@@ -17,10 +17,10 @@ func newTestCommand(fs billy.Filesystem, d string) *command {
 	return newCommand(
 		newArgumentParser(d),
 		newFileFinder(newRepositoryFileFinder(fs), fs),
-		newFileRenamer(fs, ioutil.Discard),
+		newFileRenamer(fs, io.Discard),
 		fs,
-		ioutil.Discard,
-		ioutil.Discard,
+		io.Discard,
+		io.Discard,
 	)
 }
 
@@ -31,10 +31,10 @@ func TestCommandHelp(t *testing.T) {
 	err := newCommand(
 		newArgumentParser("."),
 		newFileFinder(newRepositoryFileFinder(fs), fs),
-		newFileRenamer(fs, ioutil.Discard),
+		newFileRenamer(fs, io.Discard),
 		fs,
 		b,
-		ioutil.Discard,
+		io.Discard,
 	).Run([]string{"--help"})
 	assert.Nil(t, err)
 
@@ -48,10 +48,10 @@ func TestCommandVersion(t *testing.T) {
 	err := newCommand(
 		newArgumentParser("."),
 		newFileFinder(newRepositoryFileFinder(fs), fs),
-		newFileRenamer(fs, ioutil.Discard),
+		newFileRenamer(fs, io.Discard),
 		fs,
 		b,
-		ioutil.Discard,
+		io.Discard,
 	).Run([]string{"--version"})
 	assert.Nil(t, err)
 
@@ -74,7 +74,7 @@ func TestCommandRenameWithoutPathOption(t *testing.T) {
 	f, err := fs.Open("bar")
 	assert.Nil(t, err)
 
-	bs, err := ioutil.ReadAll(f)
+	bs, err := io.ReadAll(f)
 	assert.Nil(t, err)
 
 	assert.Equal(t, "bar", string(bs))
@@ -94,7 +94,7 @@ func TestCommandRenameOnlyFile(t *testing.T) {
 	f, err := fs.Open("foo")
 	assert.Nil(t, err)
 
-	bs, err := ioutil.ReadAll(f)
+	bs, err := io.ReadAll(f)
 	assert.Nil(t, err)
 
 	assert.Equal(t, "blah", string(bs))
@@ -102,7 +102,7 @@ func TestCommandRenameOnlyFile(t *testing.T) {
 	f, err = fs.Open("bar")
 	assert.Nil(t, err)
 
-	bs, err = ioutil.ReadAll(f)
+	bs, err = io.ReadAll(f)
 	assert.Nil(t, err)
 
 	assert.Equal(t, "baz", string(bs))
@@ -126,7 +126,7 @@ func TestCommandRenameOnlyDirectory(t *testing.T) {
 	f, err := fs.Open("foo/foo")
 	assert.Nil(t, err)
 
-	bs, err := ioutil.ReadAll(f)
+	bs, err := io.ReadAll(f)
 	assert.Nil(t, err)
 
 	assert.Equal(t, "blah", string(bs))
@@ -134,7 +134,7 @@ func TestCommandRenameOnlyDirectory(t *testing.T) {
 	f, err = fs.Open("bar")
 	assert.Nil(t, err)
 
-	bs, err = ioutil.ReadAll(f)
+	bs, err = io.ReadAll(f)
 	assert.Nil(t, err)
 
 	assert.Equal(t, "baz", string(bs))
@@ -151,7 +151,7 @@ func TestCommandRenameWithBarePattern(t *testing.T) {
 	f, err := fs.Open("foo")
 	assert.Nil(t, err)
 
-	bs, err := ioutil.ReadAll(f)
+	bs, err := io.ReadAll(f)
 	assert.Nil(t, err)
 
 	assert.Equal(t, "bar()", string(bs))
@@ -171,7 +171,7 @@ func TestCommandRenameInDirectory(t *testing.T) {
 	f, err := fs.Open("foo/bar")
 	assert.Nil(t, err)
 
-	bs, err := ioutil.ReadAll(f)
+	bs, err := io.ReadAll(f)
 	assert.Nil(t, err)
 
 	assert.Equal(t, "bar", string(bs))
@@ -191,7 +191,7 @@ func TestCommandRenameInDirectoryWithFileSpecified(t *testing.T) {
 	f, err := fs.Open("foo/bar")
 	assert.Nil(t, err)
 
-	bs, err := ioutil.ReadAll(f)
+	bs, err := io.ReadAll(f)
 	assert.Nil(t, err)
 
 	assert.Equal(t, "bar", string(bs))
@@ -209,7 +209,7 @@ func TestCommandRenameWithRegularExpression(t *testing.T) {
 	f, err := fs.Open("foe")
 	assert.Nil(t, err)
 
-	bs, err := ioutil.ReadAll(f)
+	bs, err := io.ReadAll(f)
 	assert.Nil(t, err)
 
 	assert.Equal(t, "foe", string(bs))
diff --git a/file_renamer.go b/file_renamer.go
index 0778a39..373b71e 100644
--- a/file_renamer.go
+++ b/file_renamer.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -56,7 +55,7 @@ func (r *fileRenamer) Rename(tr textRenamer, path string, baseDir string, verbos
 
 	defer f.Close()
 
-	bs, err := ioutil.ReadAll(f)
+	bs, err := io.ReadAll(f)
 	if err != nil {
 		return err
 	}
diff --git a/file_renamer_test.go b/file_renamer_test.go
index edb024f..8346577 100644
--- a/file_renamer_test.go
+++ b/file_renamer_test.go
@@ -2,7 +2,7 @@ package main
 
 import (
 	"bytes"
-	"io/ioutil"
+	"io"
 	"os"
 	"runtime"
 	"testing"
@@ -22,13 +22,13 @@ func TestFileRenamerRenameFileShrinkingAfterRenaming(t *testing.T) {
 	tr, err := newCaseTextRenamer("bar baz", "bar", nil)
 	assert.Nil(t, err)
 
-	err = newFileRenamer(fs, ioutil.Discard).Rename(tr, "foo", ".", false)
+	err = newFileRenamer(fs, io.Discard).Rename(tr, "foo", ".", false)
 	assert.Nil(t, err)
 
 	f, err := fs.Open("foo")
 	assert.Nil(t, err)
 
-	bs, err := ioutil.ReadAll(f)
+	bs, err := io.ReadAll(f)
 	assert.Nil(t, err)
 
 	assert.Equal(t, "bar", string(bs))
@@ -66,7 +66,7 @@ func TestFileRenamerRenameSymlinkToFile(t *testing.T) {
 	tr, err := newCaseTextRenamer("foo", "bar", nil)
 	assert.Nil(t, err)
 
-	err = newFileRenamer(fs, ioutil.Discard).Rename(tr, "foo", ".", true)
+	err = newFileRenamer(fs, io.Discard).Rename(tr, "foo", ".", true)
 	assert.Nil(t, err)
 
 	i, err := fs.Lstat("bar")
@@ -77,7 +77,7 @@ func TestFileRenamerRenameSymlinkToFile(t *testing.T) {
 	f, err := fs.Open("bar")
 	assert.Nil(t, err)
 
-	bs, err := ioutil.ReadAll(f)
+	bs, err := io.ReadAll(f)
 	assert.Nil(t, err)
 
 	assert.Equal(t, "bar", string(bs))
@@ -92,7 +92,7 @@ func TestFileRenamerFailToRenameDirectory(t *testing.T) {
 	tr, err := newCaseTextRenamer("foo", "bar", nil)
 	assert.Nil(t, err)
 
-	err = newFileRenamer(fs, ioutil.Discard).Rename(tr, "foo", ".", true)
+	err = newFileRenamer(fs, io.Discard).Rename(tr, "foo", ".", true)
 	assert.Error(t, err)
 }
 
@@ -108,7 +108,7 @@ func TestFileRenamerFailToRenameSymlinkToDirectory(t *testing.T) {
 	tr, err := newCaseTextRenamer("foo", "bar", nil)
 	assert.Nil(t, err)
 
-	err = newFileRenamer(fs, ioutil.Discard).Rename(tr, "foo", ".", true)
+	err = newFileRenamer(fs, io.Discard).Rename(tr, "foo", ".", true)
 	assert.Error(t, err)
 }
 
@@ -124,7 +124,7 @@ func TestFileRenamerFileInDirectory(t *testing.T) {
 	tr, err := newCaseTextRenamer("foo", "bar", nil)
 	assert.Nil(t, err)
 
-	err = newFileRenamer(fs, ioutil.Discard).Rename(tr, "foo/foo", "foo", true)
+	err = newFileRenamer(fs, io.Discard).Rename(tr, "foo/foo", "foo", true)
 	assert.Nil(t, err)
 
 	_, err = fs.Lstat("foo/bar")
diff --git a/go.mod b/go.mod
index 8fd5909..31b25d2 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/raviqqe/rnm
 
-go 1.15
+go 1.16
 
 require (
 	github.com/bradleyjkemp/cupaloy v2.3.0+incompatible
diff --git a/go.sum b/go.sum
index 4f2a99f..3c27c84 100644
--- a/go.sum
+++ b/go.sum
@@ -17,7 +17,6 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/emirpasic/gods v1.12.0 h1:QAUIPSaCu4G+POclxeqb3F+WPpdKqFGlw36+yOzGlrg=
 github.com/emirpasic/gods v1.12.0/go.mod h1:YfzfFFoVP/catgzJb4IKIqXjX78Ha8FMSDh3ymbK86o=
-github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568 h1:BHsljHzVlRcyQhjrss6TZTdY2VfCqZPbv5k3iBFa2ZQ=
 github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:xEzjJPgXI435gkrCt3MPfRiAkVrwSbHsst4LCFVfpJc=
 github.com/gliderlabs/ssh v0.2.2 h1:6zsha5zo/TWhRhwqCD3+EarCAgZ2yN28ipRnGPnwkI0=
 github.com/gliderlabs/ssh v0.2.2/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=