diff --git a/check/check_suite_test.go b/check/check_suite_test.go
index 1bb48a45..bf283df5 100644
--- a/check/check_suite_test.go
+++ b/check/check_suite_test.go
@@ -1,7 +1,6 @@
 package check_test
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -37,7 +36,7 @@ func TestCheck(t *testing.T) {
 
 func Fixture(filename string) string {
 	path := filepath.Join("fixtures", filename)
-	contents, err := ioutil.ReadFile(path)
+	contents, err := os.ReadFile(path)
 	if err != nil {
 		panic(err)
 	}
diff --git a/check/command_test.go b/check/command_test.go
index 2f90d8a7..1b45f8fc 100644
--- a/check/command_test.go
+++ b/check/command_test.go
@@ -1,7 +1,6 @@
 package check_test
 
 import (
-	"io/ioutil"
 	"os"
 
 	. "github.com/onsi/ginkgo"
@@ -25,7 +24,7 @@ var _ = Describe("Check Command", func() {
 
 		BeforeEach(func() {
 			var err error
-			tmpPath, err = ioutil.TempDir("", "check_command")
+			tmpPath, err = os.MkdirTemp("", "check_command")
 			Ω(err).ShouldNot(HaveOccurred())
 
 			request = Request{
diff --git a/in/command.go b/in/command.go
index ba6d21c9..59e1319d 100644
--- a/in/command.go
+++ b/in/command.go
@@ -4,13 +4,12 @@ import (
 	"encoding/base64"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
 	"strconv"
 
-	"github.com/concourse/s3-resource"
+	s3resource "github.com/concourse/s3-resource"
 	"github.com/concourse/s3-resource/versions"
 )
 
@@ -179,11 +178,11 @@ func (command *Command) Run(destinationDir string, request Request) (Response, e
 }
 
 func (command *Command) writeURLFile(destDir string, url string) error {
-	return ioutil.WriteFile(filepath.Join(destDir, "url"), []byte(url), 0644)
+	return os.WriteFile(filepath.Join(destDir, "url"), []byte(url), 0644)
 }
 
 func (command *Command) writeVersionFile(versionNumber string, destDir string) error {
-	return ioutil.WriteFile(filepath.Join(destDir, "version"), []byte(versionNumber), 0644)
+	return os.WriteFile(filepath.Join(destDir, "version"), []byte(versionNumber), 0644)
 }
 
 func (command *Command) downloadFile(bucketName string, remotePath string, versionID string, destinationDir string, destinationFile string) error {
@@ -209,7 +208,7 @@ func (command *Command) downloadTags(bucketName string, remotePath string, versi
 }
 
 func (command *Command) createInitialFile(destDir string, destFile string, data []byte) error {
-	return ioutil.WriteFile(filepath.Join(destDir, destFile), []byte(data), 0644)
+	return os.WriteFile(filepath.Join(destDir, destFile), []byte(data), 0644)
 }
 
 func (command *Command) metadata(remotePath string, private bool, url string) []s3resource.MetadataPair {
@@ -241,7 +240,7 @@ func extractArchive(mime, filename string) error {
 	}
 
 	if mime == "application/gzip" || mime == "application/x-gzip" {
-		fileInfos, err := ioutil.ReadDir(destDir)
+		fileInfos, err := os.ReadDir(destDir)
 		if err != nil {
 			return fmt.Errorf("failed to read dir: %s", err)
 		}
diff --git a/in/command_test.go b/in/command_test.go
index 13b66cc7..16f4891c 100644
--- a/in/command_test.go
+++ b/in/command_test.go
@@ -5,7 +5,6 @@ import (
 	"archive/zip"
 	"compress/gzip"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 	"path"
@@ -15,7 +14,7 @@ import (
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 
-	"github.com/concourse/s3-resource"
+	s3resource "github.com/concourse/s3-resource"
 	. "github.com/concourse/s3-resource/in"
 
 	"github.com/concourse/s3-resource/fakes"
@@ -34,7 +33,7 @@ var _ = Describe("In Command", func() {
 
 		BeforeEach(func() {
 			var err error
-			tmpPath, err = ioutil.TempDir("", "in_command")
+			tmpPath, err = os.MkdirTemp("", "in_command")
 			Ω(err).ShouldNot(HaveOccurred())
 
 			destDir = filepath.Join(tmpPath, "destination")
@@ -154,7 +153,7 @@ var _ = Describe("In Command", func() {
 				Ω(err).ShouldNot(HaveOccurred())
 
 				Ω(urlPath).Should(ExistOnFilesystem())
-				contents, err := ioutil.ReadFile(urlPath)
+				contents, err := os.ReadFile(urlPath)
 				Ω(err).ShouldNot(HaveOccurred())
 				Ω(string(contents)).Should(Equal("http://google.com"))
 
@@ -178,7 +177,7 @@ var _ = Describe("In Command", func() {
 					Ω(err).ShouldNot(HaveOccurred())
 
 					Ω(urlPath).Should(ExistOnFilesystem())
-					contents, err := ioutil.ReadFile(urlPath)
+					contents, err := os.ReadFile(urlPath)
 					Ω(err).ShouldNot(HaveOccurred())
 					Ω(string(contents)).Should(Equal("http://google.com"))
 
@@ -199,7 +198,7 @@ var _ = Describe("In Command", func() {
 				Ω(err).ShouldNot(HaveOccurred())
 
 				Ω(versionFile).Should(ExistOnFilesystem())
-				contents, err := ioutil.ReadFile(versionFile)
+				contents, err := os.ReadFile(versionFile)
 				Ω(err).ShouldNot(HaveOccurred())
 				Ω(string(contents)).Should(Equal("1.3"))
 			})
@@ -262,7 +261,7 @@ var _ = Describe("In Command", func() {
 					s3client.DownloadFileStub = func(bucketName string, remotePath string, versionID string, localPath string) error {
 						src := filepath.Join(tmpPath, "some-file")
 
-						err := ioutil.WriteFile(src, []byte("some-contents"), os.ModePerm)
+						err := os.WriteFile(src, []byte("some-contents"), os.ModePerm)
 						Expect(err).NotTo(HaveOccurred())
 
 						err = createTarball([]string{src}, tmpPath, localPath)
@@ -279,7 +278,7 @@ var _ = Describe("In Command", func() {
 					_, err := command.Run(destDir, request)
 					Expect(err).NotTo(HaveOccurred())
 
-					bs, err := ioutil.ReadFile(filepath.Join(destDir, "some-file"))
+					bs, err := os.ReadFile(filepath.Join(destDir, "some-file"))
 					Expect(err).NotTo(HaveOccurred())
 
 					Expect(bs).To(Equal([]byte("some-contents")))
@@ -289,10 +288,10 @@ var _ = Describe("In Command", func() {
 			Context("when the file is a zip", func() {
 				BeforeEach(func() {
 					s3client.DownloadFileStub = func(bucketName string, remotePath string, versionID string, localPath string) error {
-						inDir, err := ioutil.TempDir(tmpPath, "zip-dir")
+						inDir, err := os.MkdirTemp(tmpPath, "zip-dir")
 						Expect(err).NotTo(HaveOccurred())
 
-						err = ioutil.WriteFile(path.Join(inDir, "some-file"), []byte("some-contents"), os.ModePerm)
+						err = os.WriteFile(path.Join(inDir, "some-file"), []byte("some-contents"), os.ModePerm)
 						Expect(err).NotTo(HaveOccurred())
 
 						err = zipit(path.Join(inDir, "/"), localPath, "")
@@ -306,7 +305,7 @@ var _ = Describe("In Command", func() {
 					_, err := command.Run(destDir, request)
 					Expect(err).NotTo(HaveOccurred())
 
-					bs, err := ioutil.ReadFile(filepath.Join(destDir, "some-file"))
+					bs, err := os.ReadFile(filepath.Join(destDir, "some-file"))
 					Expect(err).NotTo(HaveOccurred())
 
 					Expect(bs).To(Equal([]byte("some-contents")))
@@ -338,7 +337,7 @@ var _ = Describe("In Command", func() {
 					_, err := command.Run(destDir, request)
 					Expect(err).NotTo(HaveOccurred())
 
-					bs, err := ioutil.ReadFile(filepath.Join(destDir, "a-file-1.3"))
+					bs, err := os.ReadFile(filepath.Join(destDir, "a-file-1.3"))
 					Expect(err).NotTo(HaveOccurred())
 
 					Expect(string(bs)).To(Equal("some-contents"))
@@ -356,12 +355,12 @@ var _ = Describe("In Command", func() {
 
 						someFile1 := filepath.Join(tmpPath, "some-dir", "some-file")
 
-						err = ioutil.WriteFile(someFile1, []byte("some-contents"), os.ModePerm)
+						err = os.WriteFile(someFile1, []byte("some-contents"), os.ModePerm)
 						Expect(err).NotTo(HaveOccurred())
 
 						someFile2 := filepath.Join(tmpPath, "some-file")
 
-						err = ioutil.WriteFile(someFile2, []byte("some-other-contents"), os.ModePerm)
+						err = os.WriteFile(someFile2, []byte("some-other-contents"), os.ModePerm)
 						Expect(err).NotTo(HaveOccurred())
 
 						tarPath := filepath.Join(tmpPath, "some-tar")
@@ -395,11 +394,11 @@ var _ = Describe("In Command", func() {
 
 					Expect(filepath.Join(destDir, "some-dir", "some-file")).To(BeARegularFile())
 
-					bs, err := ioutil.ReadFile(filepath.Join(destDir, "some-dir", "some-file"))
+					bs, err := os.ReadFile(filepath.Join(destDir, "some-dir", "some-file"))
 					Expect(err).NotTo(HaveOccurred())
 					Expect(bs).To(Equal([]byte("some-contents")))
 
-					bs, err = ioutil.ReadFile(filepath.Join(destDir, "some-file"))
+					bs, err = os.ReadFile(filepath.Join(destDir, "some-file"))
 					Expect(err).NotTo(HaveOccurred())
 					Expect(bs).To(Equal([]byte("some-other-contents")))
 				})
@@ -408,7 +407,7 @@ var _ = Describe("In Command", func() {
 			Context("when the file is not an archive", func() {
 				BeforeEach(func() {
 					s3client.DownloadFileStub = func(bucketName string, remotePath string, versionID string, localPath string) error {
-						err := ioutil.WriteFile(localPath, []byte("some-contents"), os.ModePerm)
+						err := os.WriteFile(localPath, []byte("some-contents"), os.ModePerm)
 						Expect(err).NotTo(HaveOccurred())
 
 						return nil
@@ -438,7 +437,7 @@ var _ = Describe("In Command", func() {
 
 				contentFile := filepath.Join(destDir, initialFilename)
 				Ω(contentFile).Should(BeARegularFile())
-				contents, err := ioutil.ReadFile(contentFile)
+				contents, err := os.ReadFile(contentFile)
 				Ω(err).ShouldNot(HaveOccurred())
 				Ω(string(contents)).Should(Equal(request.Source.InitialContentText))
 			})
@@ -454,7 +453,7 @@ var _ = Describe("In Command", func() {
 
 					contentFile := filepath.Join(destDir, initialFilename)
 					Ω(contentFile).Should(BeARegularFile())
-					contents, err := ioutil.ReadFile(contentFile)
+					contents, err := os.ReadFile(contentFile)
 					Ω(err).ShouldNot(HaveOccurred())
 					Ω(string(contents)).Should(Equal("the hard questions are hard 🙈"))
 				})
@@ -496,7 +495,7 @@ var _ = Describe("In Command", func() {
 
 				contentFile := filepath.Join(destDir, initialFilename)
 				Ω(contentFile).Should(BeARegularFile())
-				contents, err := ioutil.ReadFile(contentFile)
+				contents, err := os.ReadFile(contentFile)
 				Ω(err).ShouldNot(HaveOccurred())
 				Ω(string(contents)).Should(Equal(request.Source.InitialContentText))
 			})
@@ -519,7 +518,7 @@ var _ = Describe("In Command", func() {
 
 				contentFile := filepath.Join(destDir, filename)
 				Ω(contentFile).Should(BeARegularFile())
-				contents, err := ioutil.ReadFile(contentFile)
+				contents, err := os.ReadFile(contentFile)
 				Ω(err).ShouldNot(HaveOccurred())
 				Ω(string(contents)).Should(Equal(request.Source.InitialContentText))
 			})
@@ -535,7 +534,7 @@ var _ = Describe("In Command", func() {
 
 					contentFile := filepath.Join(destDir, filename)
 					Ω(contentFile).Should(BeARegularFile())
-					contents, err := ioutil.ReadFile(contentFile)
+					contents, err := os.ReadFile(contentFile)
 					Ω(err).ShouldNot(HaveOccurred())
 					Ω(string(contents)).Should(Equal("the hard questions are hard 🙈"))
 				})
@@ -577,7 +576,7 @@ var _ = Describe("In Command", func() {
 
 				contentFile := filepath.Join(destDir, filename)
 				Ω(contentFile).Should(BeARegularFile())
-				contents, err := ioutil.ReadFile(contentFile)
+				contents, err := os.ReadFile(contentFile)
 				Ω(err).ShouldNot(HaveOccurred())
 				Ω(string(contents)).Should(Equal(request.Source.InitialContentText))
 			})
diff --git a/integration/check_test.go b/integration/check_test.go
index 621f32fb..931cc4fe 100644
--- a/integration/check_test.go
+++ b/integration/check_test.go
@@ -3,7 +3,6 @@ package integration_test
 import (
 	"bytes"
 	"encoding/json"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -11,7 +10,7 @@ import (
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 
-	"github.com/concourse/s3-resource"
+	s3resource "github.com/concourse/s3-resource"
 	"github.com/concourse/s3-resource/check"
 	"github.com/onsi/gomega/gbytes"
 	"github.com/onsi/gomega/gexec"
@@ -101,7 +100,7 @@ var _ = Describe("check", func() {
 					err := json.NewEncoder(stdin).Encode(checkRequest)
 					Ω(err).ShouldNot(HaveOccurred())
 
-					tempFile, err := ioutil.TempFile("", "file-to-upload")
+					tempFile, err := os.CreateTemp("", "file-to-upload")
 					Ω(err).ShouldNot(HaveOccurred())
 					tempFile.Close()
 
@@ -135,7 +134,7 @@ var _ = Describe("check", func() {
 					err := json.NewEncoder(stdin).Encode(checkRequest)
 					Ω(err).ShouldNot(HaveOccurred())
 
-					tempFile, err := ioutil.TempFile("", "file-to-upload")
+					tempFile, err := os.CreateTemp("", "file-to-upload")
 					Ω(err).ShouldNot(HaveOccurred())
 					tempFile.Close()
 
@@ -199,7 +198,7 @@ var _ = Describe("check", func() {
 					err := json.NewEncoder(stdin).Encode(checkRequest)
 					Ω(err).ShouldNot(HaveOccurred())
 
-					tempFile, err := ioutil.TempFile("", "file-to-upload")
+					tempFile, err := os.CreateTemp("", "file-to-upload")
 					Ω(err).ShouldNot(HaveOccurred())
 					tempFile.Close()
 
@@ -228,7 +227,7 @@ var _ = Describe("check", func() {
 					err := json.NewEncoder(stdin).Encode(checkRequest)
 					Ω(err).ShouldNot(HaveOccurred())
 
-					tempFile, err := ioutil.TempFile("", "file-to-upload")
+					tempFile, err := os.CreateTemp("", "file-to-upload")
 					Ω(err).ShouldNot(HaveOccurred())
 					tempFile.Close()
 
@@ -268,7 +267,7 @@ var _ = Describe("check", func() {
 					err := json.NewEncoder(stdin).Encode(checkRequest)
 					Ω(err).ShouldNot(HaveOccurred())
 
-					tempFile, err := ioutil.TempFile("", "file-to-upload")
+					tempFile, err := os.CreateTemp("", "file-to-upload")
 					Ω(err).ShouldNot(HaveOccurred())
 					tempFile.Close()
 
@@ -341,7 +340,7 @@ var _ = Describe("check", func() {
 					err := json.NewEncoder(stdin).Encode(checkRequest)
 					Ω(err).ShouldNot(HaveOccurred())
 
-					tempFile, err := ioutil.TempFile("", "file-to-upload")
+					tempFile, err := os.CreateTemp("", "file-to-upload")
 					Ω(err).ShouldNot(HaveOccurred())
 					tempFile.Close()
 
@@ -376,7 +375,7 @@ var _ = Describe("check", func() {
 					err := json.NewEncoder(stdin).Encode(checkRequest)
 					Ω(err).ShouldNot(HaveOccurred())
 
-					tempFile, err := ioutil.TempFile("", "file-to-upload")
+					tempFile, err := os.CreateTemp("", "file-to-upload")
 					Ω(err).ShouldNot(HaveOccurred())
 					tempFile.Close()
 
@@ -430,7 +429,7 @@ var _ = Describe("check", func() {
 					err := json.NewEncoder(stdin).Encode(checkRequest)
 					Ω(err).ShouldNot(HaveOccurred())
 
-					tempFile, err := ioutil.TempFile("", "file-to-upload")
+					tempFile, err := os.CreateTemp("", "file-to-upload")
 					Ω(err).ShouldNot(HaveOccurred())
 					tempFile.Close()
 
@@ -500,7 +499,7 @@ var _ = Describe("check", func() {
 				BeforeEach(func() {
 					directoryPrefix = "files-in-bucket-that-do-not-match-with-version"
 
-					tempFile, err := ioutil.TempFile("", "file-to-upload")
+					tempFile, err := os.CreateTemp("", "file-to-upload")
 					Ω(err).ShouldNot(HaveOccurred())
 					tempFile.Close()
 
@@ -546,7 +545,7 @@ var _ = Describe("check", func() {
 					BeforeEach(func() {
 						directoryPrefix = "files-in-bucket-that-do-match-with-version"
 
-						tempFile, err := ioutil.TempFile("", "file-to-upload")
+						tempFile, err := os.CreateTemp("", "file-to-upload")
 						Ω(err).ShouldNot(HaveOccurred())
 						tempFile.Close()
 
@@ -609,7 +608,7 @@ var _ = Describe("check", func() {
 					BeforeEach(func() {
 						directoryPrefix = "files-in-bucket-with-latest-version-deleted"
 
-						tempFile, err := ioutil.TempFile("", "file-to-upload")
+						tempFile, err := os.CreateTemp("", "file-to-upload")
 						Ω(err).ShouldNot(HaveOccurred())
 						tempFile.Close()
 
diff --git a/integration/in_test.go b/integration/in_test.go
index 3018a2d1..77a03908 100644
--- a/integration/in_test.go
+++ b/integration/in_test.go
@@ -4,12 +4,11 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
 
-	"github.com/concourse/s3-resource"
+	s3resource "github.com/concourse/s3-resource"
 	"github.com/concourse/s3-resource/in"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
@@ -30,7 +29,7 @@ var _ = Describe("in", func() {
 
 	BeforeEach(func() {
 		var err error
-		destDir, err = ioutil.TempDir("", "s3_in_integration_test")
+		destDir, err = os.MkdirTemp("", "s3_in_integration_test")
 		Ω(err).ShouldNot(HaveOccurred())
 
 		stdin = &bytes.Buffer{}
@@ -104,12 +103,12 @@ var _ = Describe("in", func() {
 				},
 			}
 
-			tempFile, err := ioutil.TempFile("", "file-to-upload")
+			tempFile, err := os.CreateTemp("", "file-to-upload")
 			Ω(err).ShouldNot(HaveOccurred())
 			tempFile.Close()
 
 			for i := 1; i <= 3; i++ {
-				err = ioutil.WriteFile(tempFile.Name(), []byte(fmt.Sprintf("some-file-%d", i)), 0755)
+				err = os.WriteFile(tempFile.Name(), []byte(fmt.Sprintf("some-file-%d", i)), 0755)
 				Ω(err).ShouldNot(HaveOccurred())
 
 				_, err = s3client.UploadFile(bucketName, filepath.Join(directoryPrefix, fmt.Sprintf("some-file-%d", i)), tempFile.Name(), s3resource.NewUploadFileOptions())
@@ -151,17 +150,17 @@ var _ = Describe("in", func() {
 			}))
 
 			Ω(filepath.Join(destDir, "some-file-2")).Should(BeARegularFile())
-			contents, err := ioutil.ReadFile(filepath.Join(destDir, "some-file-2"))
+			contents, err := os.ReadFile(filepath.Join(destDir, "some-file-2"))
 			Ω(err).ShouldNot(HaveOccurred())
 			Ω(contents).Should(Equal([]byte("some-file-2")))
 
 			Ω(filepath.Join(destDir, "version")).Should(BeARegularFile())
-			versionContents, err := ioutil.ReadFile(filepath.Join(destDir, "version"))
+			versionContents, err := os.ReadFile(filepath.Join(destDir, "version"))
 			Ω(err).ShouldNot(HaveOccurred())
 			Ω(versionContents).Should(Equal([]byte("2")))
 
 			Ω(filepath.Join(destDir, "url")).Should(BeARegularFile())
-			urlContents, err := ioutil.ReadFile(filepath.Join(destDir, "url"))
+			urlContents, err := os.ReadFile(filepath.Join(destDir, "url"))
 			Ω(err).ShouldNot(HaveOccurred())
 			Ω(urlContents).Should(Equal([]byte(buildEndpoint(bucketName, endpoint) + "/in-request-files/some-file-2")))
 		})
@@ -192,12 +191,12 @@ var _ = Describe("in", func() {
 				}))
 
 				Ω(filepath.Join(destDir, "some-file-0.0.0")).Should(BeARegularFile())
-				contents, err := ioutil.ReadFile(filepath.Join(destDir, "some-file-0.0.0"))
+				contents, err := os.ReadFile(filepath.Join(destDir, "some-file-0.0.0"))
 				Ω(err).ShouldNot(HaveOccurred())
 				Ω(contents).Should(Equal([]byte(inRequest.Source.InitialContentText)))
 
 				Ω(filepath.Join(destDir, "version")).Should(BeARegularFile())
-				versionContents, err := ioutil.ReadFile(filepath.Join(destDir, "version"))
+				versionContents, err := os.ReadFile(filepath.Join(destDir, "version"))
 				Ω(err).ShouldNot(HaveOccurred())
 				Ω(versionContents).Should(Equal([]byte("0.0.0")))
 
@@ -226,12 +225,12 @@ var _ = Describe("in", func() {
 				Version: s3resource.Version{},
 			}
 
-			tempFile, err := ioutil.TempFile("", "file-to-upload")
+			tempFile, err := os.CreateTemp("", "file-to-upload")
 			Ω(err).ShouldNot(HaveOccurred())
 			tempFile.Close()
 
 			for i := 1; i <= 3; i++ {
-				err = ioutil.WriteFile(tempFile.Name(), []byte(fmt.Sprintf("some-file-%d", i)), 0755)
+				err = os.WriteFile(tempFile.Name(), []byte(fmt.Sprintf("some-file-%d", i)), 0755)
 				Ω(err).ShouldNot(HaveOccurred())
 
 				_, err = s3client.UploadFile(versionedBucketName, filepath.Join(directoryPrefix, "some-file"), tempFile.Name(), s3resource.NewUploadFileOptions())
@@ -279,17 +278,17 @@ var _ = Describe("in", func() {
 			}))
 
 			Ω(filepath.Join(destDir, "some-file")).Should(BeARegularFile())
-			contents, err := ioutil.ReadFile(filepath.Join(destDir, "some-file"))
+			contents, err := os.ReadFile(filepath.Join(destDir, "some-file"))
 			Ω(err).ShouldNot(HaveOccurred())
 			Ω(contents).Should(Equal([]byte("some-file-2")))
 
 			Ω(filepath.Join(destDir, "version")).Should(BeARegularFile())
-			versionContents, err := ioutil.ReadFile(filepath.Join(destDir, "version"))
+			versionContents, err := os.ReadFile(filepath.Join(destDir, "version"))
 			Ω(err).ShouldNot(HaveOccurred())
 			Ω(versionContents).Should(Equal([]byte(expectedVersion)))
 
 			Ω(filepath.Join(destDir, "url")).Should(BeARegularFile())
-			urlContents, err := ioutil.ReadFile(filepath.Join(destDir, "url"))
+			urlContents, err := os.ReadFile(filepath.Join(destDir, "url"))
 			Ω(err).ShouldNot(HaveOccurred())
 			Ω(urlContents).Should(Equal([]byte(buildEndpoint(versionedBucketName, endpoint) + "/in-request-files-versioned/some-file?versionId=" + expectedVersion)))
 		})
@@ -321,12 +320,12 @@ var _ = Describe("in", func() {
 				}))
 
 				Ω(filepath.Join(destDir, "some-file")).Should(BeARegularFile())
-				contents, err := ioutil.ReadFile(filepath.Join(destDir, "some-file"))
+				contents, err := os.ReadFile(filepath.Join(destDir, "some-file"))
 				Ω(err).ShouldNot(HaveOccurred())
 				Ω(contents).Should(Equal([]byte(inRequest.Source.InitialContentText)))
 
 				Ω(filepath.Join(destDir, "version")).Should(BeARegularFile())
-				versionContents, err := ioutil.ReadFile(filepath.Join(destDir, "version"))
+				versionContents, err := os.ReadFile(filepath.Join(destDir, "version"))
 				Ω(err).ShouldNot(HaveOccurred())
 				Ω(versionContents).Should(Equal([]byte(expectedVersion)))
 
@@ -363,12 +362,12 @@ var _ = Describe("in", func() {
 			err := json.NewEncoder(stdin).Encode(inRequest)
 			Ω(err).ShouldNot(HaveOccurred())
 
-			tempFile, err := ioutil.TempFile("", "file-to-upload")
+			tempFile, err := os.CreateTemp("", "file-to-upload")
 			Ω(err).ShouldNot(HaveOccurred())
 			tempFile.Close()
 
 			for i := 1; i <= 3; i++ {
-				err = ioutil.WriteFile(tempFile.Name(), []byte(fmt.Sprintf("some-file-%d", i)), 0755)
+				err = os.WriteFile(tempFile.Name(), []byte(fmt.Sprintf("some-file-%d", i)), 0755)
 				Ω(err).ShouldNot(HaveOccurred())
 
 				_, err = s3client.UploadFile(bucketName, filepath.Join(directoryPrefix, fmt.Sprintf("some-file-%d", i)), tempFile.Name(), s3resource.NewUploadFileOptions())
@@ -407,12 +406,12 @@ var _ = Describe("in", func() {
 			}))
 
 			Ω(filepath.Join(destDir, "some-file-2")).Should(BeARegularFile())
-			contents, err := ioutil.ReadFile(filepath.Join(destDir, "some-file-2"))
+			contents, err := os.ReadFile(filepath.Join(destDir, "some-file-2"))
 			Ω(err).ShouldNot(HaveOccurred())
 			Ω(contents).Should(Equal([]byte("some-file-2")))
 
 			Ω(filepath.Join(destDir, "url")).Should(BeARegularFile())
-			urlContents, err := ioutil.ReadFile(filepath.Join(destDir, "url"))
+			urlContents, err := os.ReadFile(filepath.Join(destDir, "url"))
 			Ω(err).ShouldNot(HaveOccurred())
 			Ω(urlContents).Should(Equal([]byte(inRequest.Source.CloudfrontURL + "/in-request-cloudfront-files/some-file-2")))
 		})
@@ -474,11 +473,11 @@ var _ = Describe("in", func() {
 			err := json.NewEncoder(stdin).Encode(inRequest)
 			Ω(err).ShouldNot(HaveOccurred())
 
-			tempFile, err := ioutil.TempFile("", "file-to-upload")
+			tempFile, err := os.CreateTemp("", "file-to-upload")
 			Ω(err).ShouldNot(HaveOccurred())
 			tempFile.Close()
 
-			err = ioutil.WriteFile(tempFile.Name(), []byte("some-file-1"), 0755)
+			err = os.WriteFile(tempFile.Name(), []byte("some-file-1"), 0755)
 			Ω(err).ShouldNot(HaveOccurred())
 
 			_, err = s3client.UploadFile(bucketName, filepath.Join(directoryPrefix, "some-file-1"), tempFile.Name(), s3resource.NewUploadFileOptions())
@@ -499,7 +498,7 @@ var _ = Describe("in", func() {
 
 		It("writes the tags to tags.json", func() {
 			Ω(filepath.Join(destDir, "tags.json")).Should(BeARegularFile())
-			actualTagsJSON, err := ioutil.ReadFile(filepath.Join(destDir, "tags.json"))
+			actualTagsJSON, err := os.ReadFile(filepath.Join(destDir, "tags.json"))
 			Ω(err).ShouldNot(HaveOccurred())
 
 			expectedTagsJSON, err := json.Marshal(tags)
diff --git a/integration/integration_suite_test.go b/integration/integration_suite_test.go
index 125be024..dfc589b3 100644
--- a/integration/integration_suite_test.go
+++ b/integration/integration_suite_test.go
@@ -2,15 +2,16 @@ package integration_test
 
 import (
 	"encoding/json"
-	"github.com/aws/aws-sdk-go/aws/credentials/stscreds"
-	"io/ioutil"
+	"io"
 	"os"
 
+	"github.com/aws/aws-sdk-go/aws/credentials/stscreds"
+
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/aws/session"
 	"github.com/aws/aws-sdk-go/service/s3"
 	"github.com/aws/aws-sdk-go/service/sts"
-	"github.com/concourse/s3-resource"
+	s3resource "github.com/concourse/s3-resource"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 	"github.com/onsi/gomega/gexec"
@@ -31,6 +32,7 @@ var bucketName = os.Getenv("S3_TESTING_BUCKET")
 var regionName = os.Getenv("S3_TESTING_REGION")
 var endpoint = os.Getenv("S3_ENDPOINT")
 var v2signing = os.Getenv("S3_V2_SIGNING")
+var assumeRoleArn = ""
 var awsConfig *aws.Config
 var s3client s3resource.S3Client
 var s3Service *s3.S3
@@ -64,7 +66,9 @@ func getSessionTokenS3Client(awsConfig *aws.Config) (*s3.S3, s3resource.S3Client
 		HTTPClient:  awsConfig.HTTPClient,
 	}
 
-	svc := sts.New(session.New(stsAwsConfig), stsAwsConfig)
+	stsSess, err := session.NewSession(stsAwsConfig)
+	Ω(err).ShouldNot(HaveOccurred())
+	svc := sts.New(stsSess, stsAwsConfig)
 
 	duration := int64(900)
 	params := &sts.GetSessionTokenInput{
@@ -78,13 +82,18 @@ func getSessionTokenS3Client(awsConfig *aws.Config) (*s3.S3, s3resource.S3Client
 		*resp.Credentials.AccessKeyId,
 		*resp.Credentials.SecretAccessKey,
 		*resp.Credentials.SessionToken,
+		assumeRoleArn,
 		regionName,
 		endpoint,
 		false,
 		false,
 	)
-	s3Service := s3.New(session.New(newAwsConfig), newAwsConfig)
-	s3client := s3resource.NewS3Client(ioutil.Discard, newAwsConfig, v2signing == "true", awsRoleARN)
+
+	sess, err := session.NewSession(awsConfig)
+	Ω(err).ShouldNot(HaveOccurred())
+	s3Service = s3.New(sess, awsConfig, newAwsConfig)
+	s3client, err = s3resource.NewS3Client(io.Discard, awsConfig, v2signing == "true", awsRoleARN)
+	Ω(err).ShouldNot(HaveOccurred())
 
 	return s3Service, s3client
 }
@@ -124,6 +133,7 @@ var _ = SynchronizedBeforeSuite(func() []byte {
 			accessKeyID,
 			secretAccessKey,
 			sessionToken,
+			assumeRoleArn,
 			regionName,
 			endpoint,
 			false,
@@ -140,8 +150,11 @@ var _ = SynchronizedBeforeSuite(func() []byte {
 			additionalAwsConfig.Credentials = roleCredentials
 		}
 
-		s3Service = s3.New(session.New(awsConfig), awsConfig, &additionalAwsConfig)
-		s3client = s3resource.NewS3Client(ioutil.Discard, awsConfig, v2signing == "true", awsRoleARN)
+		sess, err := session.NewSession(awsConfig)
+		Ω(err).ShouldNot(HaveOccurred())
+		s3Service = s3.New(sess, awsConfig, &additionalAwsConfig)
+		s3client, err = s3resource.NewS3Client(io.Discard, awsConfig, v2signing == "true", awsRoleARN)
+		Ω(err).ShouldNot(HaveOccurred())
 	}
 })
 
diff --git a/integration/out_test.go b/integration/out_test.go
index 36379d95..a83deb1c 100644
--- a/integration/out_test.go
+++ b/integration/out_test.go
@@ -3,7 +3,6 @@ package integration_test
 import (
 	"bytes"
 	"encoding/json"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -33,7 +32,7 @@ var _ = Describe("out", func() {
 
 	BeforeEach(func() {
 		var err error
-		sourceDir, err = ioutil.TempDir("", "s3_out_integration_test")
+		sourceDir, err = os.MkdirTemp("", "s3_out_integration_test")
 		Ω(err).ShouldNot(HaveOccurred())
 
 		stdin = &bytes.Buffer{}
@@ -88,7 +87,7 @@ var _ = Describe("out", func() {
 
 	Context("with a content-type", func() {
 		BeforeEach(func() {
-			ioutil.WriteFile(filepath.Join(sourceDir, "content-typed-file"), []byte("text only"), 0755)
+			os.WriteFile(filepath.Join(sourceDir, "content-typed-file"), []byte("text only"), 0755)
 
 			outRequest := out.Request{
 				Source: s3resource.Source{
@@ -132,7 +131,7 @@ var _ = Describe("out", func() {
 
 	Context("without a content-type", func() {
 		BeforeEach(func() {
-			ioutil.WriteFile(filepath.Join(sourceDir, "uncontent-typed-file"), []byte("text only"), 0755)
+			os.WriteFile(filepath.Join(sourceDir, "uncontent-typed-file"), []byte("text only"), 0755)
 
 			outRequest := out.Request{
 				Source: s3resource.Source{
@@ -220,7 +219,7 @@ var _ = Describe("out", func() {
 
 		Context("with a file glob and public read ACL specified", func() {
 			BeforeEach(func() {
-				err := ioutil.WriteFile(filepath.Join(sourceDir, "glob-file-to-upload"), []byte("contents"), 0755)
+				err := os.WriteFile(filepath.Join(sourceDir, "glob-file-to-upload"), []byte("contents"), 0755)
 				Ω(err).ShouldNot(HaveOccurred())
 
 				outRequest := out.Request{
@@ -348,7 +347,7 @@ var _ = Describe("out", func() {
 
 		Context("with regexp", func() {
 			BeforeEach(func() {
-				err := ioutil.WriteFile(filepath.Join(sourceDir, "file-to-upload"), []byte("contents"), 0755)
+				err := os.WriteFile(filepath.Join(sourceDir, "file-to-upload"), []byte("contents"), 0755)
 				Ω(err).ShouldNot(HaveOccurred())
 
 				outRequest := out.Request{
@@ -403,7 +402,7 @@ var _ = Describe("out", func() {
 
 		Context("with versioned_file", func() {
 			BeforeEach(func() {
-				err := ioutil.WriteFile(filepath.Join(sourceDir, "file-to-upload-local"), []byte("contents"), 0755)
+				err := os.WriteFile(filepath.Join(sourceDir, "file-to-upload-local"), []byte("contents"), 0755)
 				Ω(err).ShouldNot(HaveOccurred())
 
 				outRequest := out.Request{
@@ -454,7 +453,7 @@ var _ = Describe("out", func() {
 
 		Context("with versioned_file", func() {
 			BeforeEach(func() {
-				err := ioutil.WriteFile(filepath.Join(sourceDir, "file-to-upload-local"), []byte("contents"), 0755)
+				err := os.WriteFile(filepath.Join(sourceDir, "file-to-upload-local"), []byte("contents"), 0755)
 				Ω(err).ShouldNot(HaveOccurred())
 
 				outRequest := out.Request{
@@ -513,7 +512,7 @@ var _ = Describe("out", func() {
 
 		Context("with regexp", func() {
 			BeforeEach(func() {
-				err := ioutil.WriteFile(filepath.Join(sourceDir, "file-to-upload"), []byte("contents"), 0755)
+				err := os.WriteFile(filepath.Join(sourceDir, "file-to-upload"), []byte("contents"), 0755)
 				Ω(err).ShouldNot(HaveOccurred())
 
 				outRequest := out.Request{
diff --git a/integration/s3client_test.go b/integration/s3client_test.go
index bfd9c69d..9d156e9b 100644
--- a/integration/s3client_test.go
+++ b/integration/s3client_test.go
@@ -3,14 +3,13 @@ package integration_test
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"time"
 
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/s3"
-	"github.com/concourse/s3-resource"
+	s3resource "github.com/concourse/s3-resource"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 )
@@ -28,10 +27,10 @@ var _ = Describe("S3client", func() {
 		directoryPrefix = "s3client-tests"
 		runtime = fmt.Sprintf("%d", time.Now().Unix())
 
-		tempDir, err = ioutil.TempDir("", "s3-upload-dir")
+		tempDir, err = os.MkdirTemp("", "s3-upload-dir")
 		Ω(err).ShouldNot(HaveOccurred())
 
-		tempFile, err = ioutil.TempFile(tempDir, "file-to-upload")
+		tempFile, err = os.CreateTemp(tempDir, "file-to-upload")
 		Ω(err).ShouldNot(HaveOccurred())
 
 		tempFile.Write([]byte("hello-" + runtime))
@@ -100,7 +99,7 @@ var _ = Describe("S3client", func() {
 		err = s3client.DownloadFile(versionedBucketName, filepath.Join(directoryPrefix, "file-to-upload-1"), "", filepath.Join(tempDir, "downloaded-file"))
 		Ω(err).ShouldNot(HaveOccurred())
 
-		read, err := ioutil.ReadFile(filepath.Join(tempDir, "downloaded-file"))
+		read, err := os.ReadFile(filepath.Join(tempDir, "downloaded-file"))
 		Ω(err).ShouldNot(HaveOccurred())
 		Ω(read).Should(Equal([]byte("hello-" + runtime)))
 
@@ -110,7 +109,7 @@ var _ = Describe("S3client", func() {
 		expectedTagsJSON, err := json.Marshal(tags)
 		Ω(err).ShouldNot(HaveOccurred())
 
-		actualTagsJSON, err := ioutil.ReadFile(filepath.Join(tempDir, "tags.json"))
+		actualTagsJSON, err := os.ReadFile(filepath.Join(tempDir, "tags.json"))
 		Ω(err).ShouldNot(HaveOccurred())
 		Ω(actualTagsJSON).Should(MatchJSON(expectedTagsJSON))
 
diff --git a/out/command_test.go b/out/command_test.go
index 2652d5e6..d46e1131 100644
--- a/out/command_test.go
+++ b/out/command_test.go
@@ -1,11 +1,10 @@
 package out_test
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
-	"github.com/concourse/s3-resource"
+	s3resource "github.com/concourse/s3-resource"
 	"github.com/concourse/s3-resource/fakes"
 	"github.com/concourse/s3-resource/out"
 	"github.com/onsi/gomega/gbytes"
@@ -28,7 +27,7 @@ var _ = Describe("Out Command", func() {
 
 		BeforeEach(func() {
 			var err error
-			tmpPath, err = ioutil.TempDir("", "out_command")
+			tmpPath, err = os.MkdirTemp("", "out_command")
 			Ω(err).ShouldNot(HaveOccurred())
 
 			sourceDir = filepath.Join(tmpPath, "source")
diff --git a/out/out_suite_test.go b/out/out_suite_test.go
index 2c6c65f6..bea54abe 100644
--- a/out/out_suite_test.go
+++ b/out/out_suite_test.go
@@ -1,7 +1,6 @@
 package out_test
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -37,7 +36,7 @@ func TestOut(t *testing.T) {
 
 func Fixture(filename string) string {
 	path := filepath.Join("fixtures", filename)
-	contents, err := ioutil.ReadFile(path)
+	contents, err := os.ReadFile(path)
 	if err != nil {
 		panic(err)
 	}