diff --git a/fixtures/util/dynatrace/main.go b/fixtures/util/dynatrace/main.go
index 515d599a5..35761abf3 100644
--- a/fixtures/util/dynatrace/main.go
+++ b/fixtures/util/dynatrace/main.go
@@ -3,7 +3,6 @@ package main
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"net/http"
 	"os"
@@ -33,7 +32,7 @@ func main() {
 			}
 
 		case "/dynatrace-env.sh", "/liboneagentproc.so", "/ruxitagentproc.conf":
-			contents, err := ioutil.ReadFile(strings.TrimPrefix(req.URL.Path, "/"))
+			contents, err := os.ReadFile(strings.TrimPrefix(req.URL.Path, "/"))
 			if err != nil {
 				w.WriteHeader(http.StatusInternalServerError)
 				fmt.Fprint(w, err.Error())
@@ -69,7 +68,7 @@ func main() {
 			json.NewEncoder(w).Encode(payload)
 
 		case "/v1/deployment/installer/agent/processmoduleconfig":
-			fakeConfig, err := ioutil.ReadFile("fake_config.json")
+			fakeConfig, err := os.ReadFile("fake_config.json")
 			if err != nil {
 				w.WriteHeader(http.StatusInternalServerError)
 				w.Write([]byte(err.Error()))
diff --git a/src/go/brats/brats_suite_test.go b/src/go/brats/brats_suite_test.go
index f033d19c0..0ce9a6a54 100644
--- a/src/go/brats/brats_suite_test.go
+++ b/src/go/brats/brats_suite_test.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sort"
@@ -72,10 +71,10 @@ func CopyBrats(version string) *cutlass.App {
 		version = dep.Version
 	}
 
-	data, err := ioutil.ReadFile(filepath.Join(dir, "Godeps", "Godeps.json"))
+	data, err := os.ReadFile(filepath.Join(dir, "Godeps", "Godeps.json"))
 	Expect(err).ToNot(HaveOccurred())
 	data = bytes.Replace(data, []byte("<%= version %>"), []byte(version), -1)
-	Expect(ioutil.WriteFile(filepath.Join(dir, "Godeps", "Godeps.json"), data, 0644)).To(Succeed())
+	Expect(os.WriteFile(filepath.Join(dir, "Godeps", "Godeps.json"), data, 0644)).To(Succeed())
 
 	return cutlass.New(dir)
 }
diff --git a/src/go/finalize/finalize.go b/src/go/finalize/finalize.go
index 1f3bf2f1b..b95169f66 100644
--- a/src/go/finalize/finalize.go
+++ b/src/go/finalize/finalize.go
@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -220,7 +219,7 @@ func (gf *Finalizer) SetupGoPath() error {
 	if goPathInImage {
 		goPath = gf.Stager.BuildDir()
 	} else {
-		tmpDir, err := ioutil.TempDir("", "gobuildpack.gopath")
+		tmpDir, err := os.MkdirTemp("", "gobuildpack.gopath")
 		if err != nil {
 			return err
 		}
@@ -246,7 +245,7 @@ func (gf *Finalizer) SetupGoPath() error {
 	}
 
 	if goPathInImage {
-		files, err := ioutil.ReadDir(gf.Stager.BuildDir())
+		files, err := os.ReadDir(gf.Stager.BuildDir())
 		if err != nil {
 			return err
 		}
@@ -304,7 +303,7 @@ func (gf *Finalizer) RunDepEnsure() error {
 
 	if vendorDirExists {
 		numSubDirs := 0
-		files, err := ioutil.ReadDir(filepath.Join(gf.mainPackagePath(), "vendor"))
+		files, err := os.ReadDir(filepath.Join(gf.mainPackagePath(), "vendor"))
 		if err != nil {
 			return err
 		}
@@ -345,7 +344,7 @@ func (gf *Finalizer) RunGlideInstall() error {
 
 	if vendorDirExists {
 		numSubDirs := 0
-		files, err := ioutil.ReadDir(filepath.Join(gf.mainPackagePath(), "vendor"))
+		files, err := os.ReadDir(filepath.Join(gf.mainPackagePath(), "vendor"))
 		if err != nil {
 			return err
 		}
@@ -477,7 +476,7 @@ func (gf *Finalizer) CreateStartupEnvironment(tempDir string) error {
 		mainPkgName = filepath.Base(gf.PackageList[0])
 	}
 
-	err := ioutil.WriteFile(filepath.Join(tempDir, "buildpack-release-step.yml"), []byte(data.ReleaseYAML(mainPkgName)), 0644)
+	err := os.WriteFile(filepath.Join(tempDir, "buildpack-release-step.yml"), []byte(data.ReleaseYAML(mainPkgName)), 0644)
 	if err != nil {
 		gf.Log.Error("Unable to write release yml: %s", err)
 		return err
diff --git a/src/go/finalize/finalize_test.go b/src/go/finalize/finalize_test.go
index d658262d7..9e9b93ace 100644
--- a/src/go/finalize/finalize_test.go
+++ b/src/go/finalize/finalize_test.go
@@ -3,7 +3,6 @@ package finalize_test
 import (
 	"bytes"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -43,14 +42,14 @@ var _ = Describe("Finalize", func() {
 	)
 
 	BeforeEach(func() {
-		depsDir, err = ioutil.TempDir("", "go-buildpack.build.")
+		depsDir, err = os.MkdirTemp("", "go-buildpack.build.")
 		Expect(err).To(BeNil())
 
 		depsIdx = "06"
 		err = os.MkdirAll(filepath.Join(depsDir, depsIdx), 0755)
 		Expect(err).To(BeNil())
 
-		buildDir, err = ioutil.TempDir("", "go-buildpack.build.")
+		buildDir, err = os.MkdirTemp("", "go-buildpack.build.")
 		Expect(err).To(BeNil())
 
 		buffer = new(bytes.Buffer)
@@ -90,7 +89,7 @@ var _ = Describe("Finalize", func() {
 	Describe("NewFinalizer", func() {
 		Context("the vendor tool is godep", func() {
 			BeforeEach(func() {
-				ioutil.WriteFile(filepath.Join(depsDir, depsIdx, "config.yml"), []byte(`name: "go"
+				os.WriteFile(filepath.Join(depsDir, depsIdx, "config.yml"), []byte(`name: "go"
 config:
   GoVersion: 1.4.2
   VendorTool: godep
@@ -109,7 +108,7 @@ config:
 		})
 		Context("the vendor tool is glide", func() {
 			BeforeEach(func() {
-				ioutil.WriteFile(filepath.Join(depsDir, depsIdx, "config.yml"), []byte(`name: "go"
+				os.WriteFile(filepath.Join(depsDir, depsIdx, "config.yml"), []byte(`name: "go"
 config:
   GoVersion: 1.2.4
   VendorTool: glide
@@ -126,7 +125,7 @@ config:
 		})
 		Context("the vendor tool is dep", func() {
 			BeforeEach(func() {
-				ioutil.WriteFile(filepath.Join(depsDir, depsIdx, "config.yml"), []byte(`name: "go"
+				os.WriteFile(filepath.Join(depsDir, depsIdx, "config.yml"), []byte(`name: "go"
 config:
   GoVersion: 1.9.0
   VendorTool: dep
@@ -256,19 +255,19 @@ config:
 			oldGoBin = os.Getenv("GOBIN")
 			oldGoSetupGopathInImage = os.Getenv("GO_SETUP_GOPATH_IN_IMAGE")
 
-			err := ioutil.WriteFile(filepath.Join(buildDir, "main.go"), []byte("xx"), 0644)
+			err := os.WriteFile(filepath.Join(buildDir, "main.go"), []byte("xx"), 0644)
 			Expect(err).To(BeNil())
 
 			err = os.MkdirAll(filepath.Join(buildDir, "vendor"), 0755)
 			Expect(err).To(BeNil())
 
-			err = ioutil.WriteFile(filepath.Join(buildDir, "vendor", "lib.go"), []byte("xx"), 0644)
+			err = os.WriteFile(filepath.Join(buildDir, "vendor", "lib.go"), []byte("xx"), 0644)
 			Expect(err).To(BeNil())
 
-			err = ioutil.WriteFile(filepath.Join(buildDir, "Procfile"), []byte("xx"), 0644)
+			err = os.WriteFile(filepath.Join(buildDir, "Procfile"), []byte("xx"), 0644)
 			Expect(err).To(BeNil())
 
-			err = ioutil.WriteFile(filepath.Join(buildDir, ".profile"), []byte("xx"), 0644)
+			err = os.WriteFile(filepath.Join(buildDir, ".profile"), []byte("xx"), 0644)
 			Expect(err).To(BeNil())
 
 			err = os.MkdirAll(filepath.Join(buildDir, ".cloudfoundry"), 0755)
@@ -277,7 +276,7 @@ config:
 			err = os.MkdirAll(filepath.Join(buildDir, ".profile.d"), 0755)
 			Expect(err).To(BeNil())
 
-			err = ioutil.WriteFile(filepath.Join(buildDir, ".profile.d", "filename.sh"), []byte("xx"), 0644)
+			err = os.WriteFile(filepath.Join(buildDir, ".profile.d", "filename.sh"), []byte("xx"), 0644)
 			Expect(err).To(BeNil())
 		})
 
@@ -473,7 +472,7 @@ config:
 
 		BeforeEach(func() {
 			mainPackageName = "a/package/name"
-			goPath, err = ioutil.TempDir("", "go-buildpack.package")
+			goPath, err = os.MkdirTemp("", "go-buildpack.package")
 			Expect(err).To(BeNil())
 
 			mainPackagePath = filepath.Join(goPath, "src", mainPackageName)
@@ -515,7 +514,7 @@ config:
 
 		BeforeEach(func() {
 			mainPackageName = "a/package/name"
-			goPath, err = ioutil.TempDir("", "go-buildpack.package")
+			goPath, err = os.MkdirTemp("", "go-buildpack.package")
 			Expect(err).To(BeNil())
 
 			mainPackagePath = filepath.Join(goPath, "src", mainPackageName)
@@ -641,7 +640,7 @@ config:
 
 		BeforeEach(func() {
 			mainPackageName = "a/package/name"
-			goPath, err = ioutil.TempDir("", "go-buildpack.package")
+			goPath, err = os.MkdirTemp("", "go-buildpack.package")
 			Expect(err).To(BeNil())
 
 			mainPackagePath = filepath.Join(goPath, "src", mainPackageName)
@@ -984,7 +983,7 @@ config:
 			packageList = []string{"first", "second"}
 			buildFlags = []string{"-a=1", "-b=2"}
 
-			goPath, err = ioutil.TempDir("", "go-buildpack.gopath")
+			goPath, err = os.MkdirTemp("", "go-buildpack.gopath")
 			Expect(err).To(BeNil())
 
 			mainPackagePath = filepath.Join(goPath, "src", "first")
@@ -1102,7 +1101,7 @@ config:
 			err = os.MkdirAll(goDir, 0755)
 			Expect(err).To(BeNil())
 
-			tempDir, err = ioutil.TempDir("", "gobuildpack.releaseyml")
+			tempDir, err = os.MkdirTemp("", "gobuildpack.releaseyml")
 			Expect(err).To(BeNil())
 		})
 
@@ -1110,7 +1109,7 @@ config:
 			err = gf.CreateStartupEnvironment(tempDir)
 			Expect(err).To(BeNil())
 
-			contents, err := ioutil.ReadFile(filepath.Join(tempDir, "buildpack-release-step.yml"))
+			contents, err := os.ReadFile(filepath.Join(tempDir, "buildpack-release-step.yml"))
 			Expect(err).To(BeNil())
 
 			yaml := `---
@@ -1124,7 +1123,7 @@ default_process_types:
 			err = gf.CreateStartupEnvironment(tempDir)
 			Expect(err).To(BeNil())
 
-			contents, err := ioutil.ReadFile(filepath.Join(gf.Stager.DepDir(), "profile.d", "go.sh"))
+			contents, err := os.ReadFile(filepath.Join(gf.Stager.DepDir(), "profile.d", "go.sh"))
 			Expect(err).To(BeNil())
 
 			Expect(string(contents)).To(Equal("PATH=$PATH:$HOME/bin\n"))
@@ -1135,10 +1134,10 @@ default_process_types:
 				err = os.MkdirAll(filepath.Join(depsDir, "06", "go3.4.5"), 0755)
 				Expect(err).To(BeNil())
 
-				err = ioutil.WriteFile(filepath.Join(depsDir, "06", "go3.4.5", "thing.txt"), []byte("abc"), 0644)
+				err = os.WriteFile(filepath.Join(depsDir, "06", "go3.4.5", "thing.txt"), []byte("abc"), 0644)
 				Expect(err).To(BeNil())
 
-				err = ioutil.WriteFile(filepath.Join(depsDir, "06", "config.yml"), []byte("some yaml"), 0644)
+				err = os.WriteFile(filepath.Join(depsDir, "06", "config.yml"), []byte("some yaml"), 0644)
 				Expect(err).To(BeNil())
 			})
 
@@ -1148,7 +1147,7 @@ default_process_types:
 
 				Expect(filepath.Join(depsDir, "06", "go3.4.5")).NotTo(BeADirectory())
 
-				content, err := ioutil.ReadFile(filepath.Join(filepath.Join(depsDir, "06"), "config.yml"))
+				content, err := os.ReadFile(filepath.Join(filepath.Join(depsDir, "06"), "config.yml"))
 				Expect(err).To(BeNil())
 				Expect(string(content)).To(Equal("some yaml"))
 			})
@@ -1214,7 +1213,7 @@ default_process_types:
 				err = gf.CreateStartupEnvironment(tempDir)
 				Expect(err).To(BeNil())
 
-				contents, err := ioutil.ReadFile(filepath.Join(gf.Stager.DepDir(), "profile.d", "zzgopath.sh"))
+				contents, err := os.ReadFile(filepath.Join(gf.Stager.DepDir(), "profile.d", "zzgopath.sh"))
 				Expect(err).To(BeNil())
 
 				Expect(string(contents)).To(ContainSubstring("export GOPATH=$HOME"))
diff --git a/src/go/hooks/appdynamics_test.go b/src/go/hooks/appdynamics_test.go
index 4c573b946..7fa87709b 100644
--- a/src/go/hooks/appdynamics_test.go
+++ b/src/go/hooks/appdynamics_test.go
@@ -2,7 +2,6 @@ package hooks_test
 
 import (
 	"bytes"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -39,10 +38,10 @@ var _ = Describe("Appdynamics", func() {
 	)
 
 	BeforeEach(func() {
-		buildDir, err = ioutil.TempDir("", "go-buildpack.build.")
+		buildDir, err = os.MkdirTemp("", "go-buildpack.build.")
 		Expect(err).To(BeNil())
 
-		depsDir, err = ioutil.TempDir("", "go-buildpack.deps.")
+		depsDir, err = os.MkdirTemp("", "go-buildpack.deps.")
 		Expect(err).To(BeNil())
 
 		buffer = new(bytes.Buffer)
@@ -91,7 +90,7 @@ export APPD_KEY_2=APPD_VAL_2`
 
 export APPD_KEY_1=APPD_VAL_1
 export APPD_KEY_2=APPD_VAL_2`
-			script, err := ioutil.ReadFile(appdynamicsShellScript)
+			script, err := os.ReadFile(appdynamicsShellScript)
 			Expect(err).To(BeNil())
 			Expect(string(script)).To(Equal(expectedScript))
 		})
@@ -144,7 +143,7 @@ export APPD_KEY_2=APPD_VAL_2`
 			Expect(err).To(BeNil())
 
 			Expect(libbuildpack.FileExists(filepath.Join(stager.DepDir(), "profile.d", "appdynamics.sh"))).To(BeTrue())
-			appdynamicsInfo, err := ioutil.ReadFile(filepath.Join(stager.DepDir(), "profile.d", "appdynamics.sh"))
+			appdynamicsInfo, err := os.ReadFile(filepath.Join(stager.DepDir(), "profile.d", "appdynamics.sh"))
 			expectedInfo := `# Autogenerated Appdynamics Script 
 
 export APPD_ACCOUNT_ACCESS_KEY=key
diff --git a/src/go/supply/supply.go b/src/go/supply/supply.go
index a0b1ad2d4..baf602c2b 100644
--- a/src/go/supply/supply.go
+++ b/src/go/supply/supply.go
@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"slices"
@@ -296,13 +295,13 @@ func (gs *Supplier) isGoPath() (bool, error) {
 		return false, nil
 	}
 
-	files, err := ioutil.ReadDir(filepath.Join(gs.Stager.BuildDir(), "src"))
+	files, err := os.ReadDir(filepath.Join(gs.Stager.BuildDir(), "src"))
 	if err != nil {
 		return false, err
 	}
 
 	for _, file := range files {
-		if file.Mode().IsDir() {
+		if file.IsDir() {
 			err = filepath.Walk(filepath.Join(srcDir, file.Name()), isGoFile)
 			if err != nil {
 				if err.Error() == "found Go file" {
diff --git a/src/go/supply/supply_test.go b/src/go/supply/supply_test.go
index fdb8586e6..e8e1d6172 100644
--- a/src/go/supply/supply_test.go
+++ b/src/go/supply/supply_test.go
@@ -2,7 +2,6 @@ package supply_test
 
 import (
 	"bytes"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"time"
@@ -37,15 +36,15 @@ var _ = Describe("Supply", func() {
 	)
 
 	BeforeEach(func() {
-		bpDir, err = ioutil.TempDir("", "go-buildpack.bpDir.")
+		bpDir, err = os.MkdirTemp("", "go-buildpack.bpDir.")
 		Expect(err).To(BeNil())
-		Expect(ioutil.WriteFile(filepath.Join(bpDir, "manifest.yml"), []byte("{}"), 0644)).To(Succeed())
-		Expect(ioutil.WriteFile(filepath.Join(bpDir, "VERSION"), []byte("1.2.3"), 0644)).To(Succeed())
+		Expect(os.WriteFile(filepath.Join(bpDir, "manifest.yml"), []byte("{}"), 0644)).To(Succeed())
+		Expect(os.WriteFile(filepath.Join(bpDir, "VERSION"), []byte("1.2.3"), 0644)).To(Succeed())
 
-		buildDir, err = ioutil.TempDir("", "go-buildpack.build.")
+		buildDir, err = os.MkdirTemp("", "go-buildpack.build.")
 		Expect(err).To(BeNil())
 
-		depsDir, err = ioutil.TempDir("", "go-buildpack.deps.")
+		depsDir, err = os.MkdirTemp("", "go-buildpack.deps.")
 		Expect(err).To(BeNil())
 
 		depsIdx = "04"
@@ -99,7 +98,7 @@ var _ = Describe("Supply", func() {
 				Expect(err).To(BeNil())
 
 				godepsJson = filepath.Join(buildDir, "Godeps", "Godeps.json")
-				err = ioutil.WriteFile(godepsJson, []byte(godepsJsonContents), 0644)
+				err = os.WriteFile(godepsJson, []byte(godepsJsonContents), 0644)
 				Expect(err).To(BeNil())
 			})
 
@@ -190,7 +189,7 @@ var _ = Describe("Supply", func() {
 
 		Context("there is a go.mod file", func() {
 			BeforeEach(func() {
-				Expect(ioutil.WriteFile(filepath.Join(buildDir, "go.mod"), []byte("xxx"), 0666)).To(Succeed())
+				Expect(os.WriteFile(filepath.Join(buildDir, "go.mod"), []byte("xxx"), 0666)).To(Succeed())
 			})
 
 			AfterEach(func() {
@@ -213,7 +212,7 @@ var _ = Describe("Supply", func() {
 
 		Context("there is a .godir file", func() {
 			BeforeEach(func() {
-				err = ioutil.WriteFile(filepath.Join(buildDir, ".godir"), []byte("xxx"), 0644)
+				err = os.WriteFile(filepath.Join(buildDir, ".godir"), []byte("xxx"), 0644)
 			})
 
 			It("logs that .godir is deprecated and returns an error", func() {
@@ -227,7 +226,7 @@ var _ = Describe("Supply", func() {
 
 		Context("there is a glide.yaml file", func() {
 			BeforeEach(func() {
-				err = ioutil.WriteFile(filepath.Join(buildDir, "glide.yaml"), []byte("xxx"), 0644)
+				err = os.WriteFile(filepath.Join(buildDir, "glide.yaml"), []byte("xxx"), 0644)
 				Expect(err).To(BeNil())
 			})
 
@@ -244,13 +243,13 @@ var _ = Describe("Supply", func() {
 				err = os.MkdirAll(filepath.Join(buildDir, "src", "package"), 0755)
 				Expect(err).To(BeNil())
 
-				err = ioutil.WriteFile(filepath.Join(buildDir, "src", "package", "thing.go"), []byte("xxx"), 0644)
+				err = os.WriteFile(filepath.Join(buildDir, "src", "package", "thing.go"), []byte("xxx"), 0644)
 				Expect(err).To(BeNil())
 			})
 		})
 		Context("there is a Gopkg.toml", func() {
 			BeforeEach(func() {
-				err = ioutil.WriteFile(filepath.Join(buildDir, "Gopkg.toml"), []byte("xxx"), 0644)
+				err = os.WriteFile(filepath.Join(buildDir, "Gopkg.toml"), []byte("xxx"), 0644)
 				Expect(err).To(BeNil())
 			})
 
@@ -432,11 +431,11 @@ var _ = Describe("Supply", func() {
 			err = gs.InstallGo()
 			Expect(err).To(BeNil())
 
-			contents, err := ioutil.ReadFile(filepath.Join(depsDir, depsIdx, "env", "GOROOT"))
+			contents, err := os.ReadFile(filepath.Join(depsDir, depsIdx, "env", "GOROOT"))
 			Expect(err).To(BeNil())
 			Expect(string(contents)).To(Equal(filepath.Join(goInstallDir)))
 
-			contents, err = ioutil.ReadFile(filepath.Join(depsDir, depsIdx, "env", "GO111MODULE"))
+			contents, err = os.ReadFile(filepath.Join(depsDir, depsIdx, "env", "GO111MODULE"))
 			Expect(err).To(BeNil())
 			Expect(string(contents)).To(Equal("auto"))
 		})
@@ -462,7 +461,7 @@ var _ = Describe("Supply", func() {
 			err = gs.WriteGoRootToProfileD()
 			Expect(err).To(BeNil())
 
-			contents, err := ioutil.ReadFile(filepath.Join(depsDir, depsIdx, "profile.d", "goroot.sh"))
+			contents, err := os.ReadFile(filepath.Join(depsDir, depsIdx, "profile.d", "goroot.sh"))
 			Expect(err).To(BeNil())
 
 			Expect(string(contents)).To(ContainSubstring("export GOROOT=$DEPS_DIR/04/go3.4.5"))