diff --git a/buildkitd.go b/buildkitd.go
index a2e65cc..e4c233f 100644
--- a/buildkitd.go
+++ b/buildkitd.go
@@ -3,7 +3,6 @@ package task
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/url"
 	"os"
 	"os/exec"
@@ -101,7 +100,7 @@ func SpawnBuildkitd(req Request, opts *BuildkitdOpts) (*Buildkitd, error) {
 	}
 
 	for {
-		err := buildctl(addr, ioutil.Discard, "debug", "workers")
+		err := buildctl(addr, io.Discard, "debug", "workers")
 		if err == nil {
 			break
 		}
@@ -149,8 +148,7 @@ func generateConfig(req Request, configPath string) error {
 	var config BuildkitdConfig
 
 	if len(req.Config.RegistryMirrors) > 0 {
-		var registryConfigs map[string]RegistryConfig
-		registryConfigs = make(map[string]RegistryConfig)
+		var registryConfigs = make(map[string]RegistryConfig)
 		registryConfigs["docker.io"] = RegistryConfig{
 			Mirrors: req.Config.RegistryMirrors,
 		}
diff --git a/buildkitd_test.go b/buildkitd_test.go
index 0d78f6c..ddded9b 100644
--- a/buildkitd_test.go
+++ b/buildkitd_test.go
@@ -1,7 +1,6 @@
 package task_test
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -30,7 +29,7 @@ func (s *BuildkitdSuite) TearDownSuite() {
 
 func (s *BuildkitdSuite) SetupTest() {
 	var err error
-	s.outputsDir, err = ioutil.TempDir("", "oci-build-task-test")
+	s.outputsDir, err = os.MkdirTemp("", "oci-build-task-test")
 	s.NoError(err)
 
 	s.req = task.Request{
@@ -64,10 +63,10 @@ func (s *BuildkitdSuite) TestGenerateConfig() {
 	})
 	s.NoError(err)
 
-	configContent, err := ioutil.ReadFile(s.configPath("mirrors.toml"))
+	configContent, err := os.ReadFile(s.configPath("mirrors.toml"))
 	s.NoError(err)
 
-	expectedContent, err := ioutil.ReadFile("testdata/buildkitd-config/mirrors.toml")
+	expectedContent, err := os.ReadFile("testdata/buildkitd-config/mirrors.toml")
 	s.NoError(err)
 
 	s.Equal(expectedContent, configContent)
diff --git a/task.go b/task.go
index c5778b8..9de7e2a 100644
--- a/task.go
+++ b/task.go
@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -25,7 +24,7 @@ func StoreSecret(req *Request, name, value string) error {
 	if err != nil {
 		return fmt.Errorf("unable to create secret directory: %w", err)
 	}
-	err = ioutil.WriteFile(secretFile, []byte(value), 0600)
+	err = os.WriteFile(secretFile, []byte(value), 0600)
 	if err != nil {
 		return fmt.Errorf("unable to write secret to file: %w", err)
 	}
@@ -296,7 +295,7 @@ func loadOciImages(imagePaths []string, req Request) error {
 func writeDigest(dest string, digest v1.Hash) error {
 	digestPath := filepath.Join(dest, "digest")
 
-	err := ioutil.WriteFile(digestPath, []byte(digest.String()), 0644)
+	err := os.WriteFile(digestPath, []byte(digest.String()), 0644)
 	if err != nil {
 		return errors.Wrap(err, "write digest file")
 	}
@@ -360,7 +359,7 @@ func sanitize(cfg *Config) error {
 	}
 
 	if cfg.TargetFile != "" {
-		target, err := ioutil.ReadFile(cfg.TargetFile)
+		target, err := os.ReadFile(cfg.TargetFile)
 		if err != nil {
 			return errors.Wrap(err, "read target file")
 		}
@@ -369,7 +368,7 @@ func sanitize(cfg *Config) error {
 	}
 
 	if cfg.BuildArgsFile != "" {
-		buildArgs, err := ioutil.ReadFile(cfg.BuildArgsFile)
+		buildArgs, err := os.ReadFile(cfg.BuildArgsFile)
 		if err != nil {
 			return errors.Wrap(err, "read build args file")
 		}
@@ -385,7 +384,7 @@ func sanitize(cfg *Config) error {
 	}
 
 	if cfg.LabelsFile != "" {
-		Labels, err := ioutil.ReadFile(cfg.LabelsFile)
+		Labels, err := os.ReadFile(cfg.LabelsFile)
 		if err != nil {
 			return errors.Wrap(err, "read labels file")
 		}
diff --git a/task_test.go b/task_test.go
index f498f14..2681bda 100644
--- a/task_test.go
+++ b/task_test.go
@@ -3,7 +3,6 @@ package task_test
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"net/http/httptest"
 	"net/url"
 	"os"
@@ -46,7 +45,7 @@ func (s *TaskSuite) TearDownSuite() {
 
 func (s *TaskSuite) SetupTest() {
 	var err error
-	s.outputsDir, err = ioutil.TempDir("", "oci-build-task-test")
+	s.outputsDir, err = os.MkdirTemp("", "oci-build-task-test")
 	s.NoError(err)
 
 	err = os.Mkdir(s.imagePath(), 0755)
@@ -88,7 +87,7 @@ func (s *TaskSuite) TestDigestFile() {
 	_, err := s.build()
 	s.NoError(err)
 
-	digest, err := ioutil.ReadFile(s.imagePath("digest"))
+	digest, err := os.ReadFile(s.imagePath("digest"))
 	s.NoError(err)
 
 	image, err := tarball.ImageFromPath(s.imagePath("image.tar"), nil)
@@ -240,10 +239,10 @@ func (s *TaskSuite) TestUnpackRootfs() {
 	meta, err := s.imageMetadata("image")
 	s.NoError(err)
 
-	rootfsContent, err := ioutil.ReadFile(s.imagePath("rootfs", "Dockerfile"))
+	rootfsContent, err := os.ReadFile(s.imagePath("rootfs", "Dockerfile"))
 	s.NoError(err)
 
-	expectedContent, err := ioutil.ReadFile("testdata/unpack-rootfs/Dockerfile")
+	expectedContent, err := os.ReadFile("testdata/unpack-rootfs/Dockerfile")
 	s.NoError(err)
 
 	s.Equal(rootfsContent, expectedContent)
@@ -287,7 +286,7 @@ func (s *TaskSuite) TestRegistryMirrors() {
 	s.req.Config.ContextDir = "testdata/mirror"
 	s.req.Config.RegistryMirrors = []string{mirrorURL.Host}
 
-	rootDir, err := ioutil.TempDir("", "mirrored-buildkitd")
+	rootDir, err := os.MkdirTemp("", "mirrored-buildkitd")
 	s.NoError(err)
 
 	defer os.RemoveAll(rootDir)
@@ -324,7 +323,7 @@ func (s *TaskSuite) TestRegistryMirrors() {
 }
 
 func (s *TaskSuite) TestImageArgs() {
-	imagesDir, err := ioutil.TempDir("", "preload-images")
+	imagesDir, err := os.MkdirTemp("", "preload-images")
 	s.NoError(err)
 
 	defer os.RemoveAll(imagesDir)
@@ -382,7 +381,7 @@ func (s *TaskSuite) TestImageArgs() {
 }
 
 func (s *TaskSuite) TestImageArgsWithUppercaseName() {
-	imagesDir, err := ioutil.TempDir("", "preload-images")
+	imagesDir, err := os.MkdirTemp("", "preload-images")
 	s.NoError(err)
 
 	defer os.RemoveAll(imagesDir)
@@ -405,10 +404,10 @@ func (s *TaskSuite) TestImageArgsWithUppercaseName() {
 	meta, err := s.imageMetadata("image")
 	s.NoError(err)
 
-	rootfsContent, err := ioutil.ReadFile(s.imagePath("rootfs", "Dockerfile.second"))
+	rootfsContent, err := os.ReadFile(s.imagePath("rootfs", "Dockerfile.second"))
 	s.NoError(err)
 
-	expectedContent, err := ioutil.ReadFile("testdata/image-args/Dockerfile.uppercase")
+	expectedContent, err := os.ReadFile("testdata/image-args/Dockerfile.uppercase")
 	s.NoError(err)
 
 	s.Equal(rootfsContent, expectedContent)
@@ -418,7 +417,7 @@ func (s *TaskSuite) TestImageArgsWithUppercaseName() {
 }
 
 func (s *TaskSuite) TestImageArgsUnpack() {
-	imagesDir, err := ioutil.TempDir("", "preload-images")
+	imagesDir, err := os.MkdirTemp("", "preload-images")
 	s.NoError(err)
 
 	defer os.RemoveAll(imagesDir)
@@ -442,10 +441,10 @@ func (s *TaskSuite) TestImageArgsUnpack() {
 	meta, err := s.imageMetadata("image")
 	s.NoError(err)
 
-	rootfsContent, err := ioutil.ReadFile(s.imagePath("rootfs", "Dockerfile.second"))
+	rootfsContent, err := os.ReadFile(s.imagePath("rootfs", "Dockerfile.second"))
 	s.NoError(err)
 
-	expectedContent, err := ioutil.ReadFile("testdata/image-args/Dockerfile")
+	expectedContent, err := os.ReadFile("testdata/image-args/Dockerfile")
 	s.NoError(err)
 
 	s.Equal(rootfsContent, expectedContent)
@@ -517,7 +516,7 @@ func (s *TaskSuite) TestMultiTargetDigest() {
 
 	additionalImage, err := tarball.ImageFromPath(s.outputPath("additional-target", "image.tar"), nil)
 	s.NoError(err)
-	digest, err := ioutil.ReadFile(s.outputPath("additional-target", "digest"))
+	digest, err := os.ReadFile(s.outputPath("additional-target", "digest"))
 	s.NoError(err)
 	additionalManifest, err := additionalImage.Manifest()
 	s.NoError(err)
@@ -525,7 +524,7 @@ func (s *TaskSuite) TestMultiTargetDigest() {
 
 	finalImage, err := tarball.ImageFromPath(s.imagePath("image.tar"), nil)
 	s.NoError(err)
-	digest, err = ioutil.ReadFile(s.outputPath("image", "digest"))
+	digest, err = os.ReadFile(s.outputPath("image", "digest"))
 	s.NoError(err)
 	finalManifest, err := finalImage.Manifest()
 	s.NoError(err)
@@ -543,9 +542,9 @@ func (s *TaskSuite) TestMultiTargetUnpack() {
 	_, err = s.build()
 	s.NoError(err)
 
-	rootfsContent, err := ioutil.ReadFile(s.outputPath("additional-target", "rootfs", "Dockerfile.banana"))
+	rootfsContent, err := os.ReadFile(s.outputPath("additional-target", "rootfs", "Dockerfile.banana"))
 	s.NoError(err)
-	expectedContent, err := ioutil.ReadFile("testdata/multi-target/Dockerfile")
+	expectedContent, err := os.ReadFile("testdata/multi-target/Dockerfile")
 	s.NoError(err)
 	s.Equal(rootfsContent, expectedContent)
 
@@ -554,9 +553,9 @@ func (s *TaskSuite) TestMultiTargetUnpack() {
 	s.Equal(meta.User, "banana")
 	s.Equal(meta.Env, []string{"PATH=/darkness", "BA=nana"})
 
-	rootfsContent, err = ioutil.ReadFile(s.outputPath("image", "rootfs", "Dockerfile.orange"))
+	rootfsContent, err = os.ReadFile(s.outputPath("image", "rootfs", "Dockerfile.orange"))
 	s.NoError(err)
-	expectedContent, err = ioutil.ReadFile("testdata/multi-target/Dockerfile")
+	expectedContent, err = os.ReadFile("testdata/multi-target/Dockerfile")
 	s.NoError(err)
 	s.Equal(rootfsContent, expectedContent)
 
@@ -634,7 +633,7 @@ func (s *TaskSuite) outputPath(path ...string) string {
 }
 
 func (s *TaskSuite) imageMetadata(output string) (task.ImageMetadata, error) {
-	metadataPayload, err := ioutil.ReadFile(s.outputPath(output, "metadata.json"))
+	metadataPayload, err := os.ReadFile(s.outputPath(output, "metadata.json"))
 	if err != nil {
 		return task.ImageMetadata{}, err
 	}
diff --git a/unpack.go b/unpack.go
index 18cecf5..3d08148 100644
--- a/unpack.go
+++ b/unpack.go
@@ -6,7 +6,6 @@ import (
 	"archive/tar"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -31,7 +30,7 @@ func unpackImage(dest string, img v1.Image, debug bool) error {
 
 	var out io.Writer
 	if debug {
-		out = ioutil.Discard
+		out = io.Discard
 	} else {
 		out = os.Stderr
 	}