diff --git a/cmd/run.go b/cmd/run.go
index 581bc4be..305863db 100644
--- a/cmd/run.go
+++ b/cmd/run.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"strings"
 	"sync"
@@ -62,7 +61,7 @@ func newRunCommand() *cobra.Command {
 
 			// User can specify a path to a template used for Git commit messages
 			if commitMessagePath != "" {
-				tpl, err := ioutil.ReadFile(commitMessagePath)
+				tpl, err := os.ReadFile(commitMessagePath)
 				if err != nil {
 					if errors.Is(err, os.ErrNotExist) {
 						log.Warnf("commit message template at %s does not exist, using default", commitMessagePath)
diff --git a/cmd/template.go b/cmd/template.go
index c73fd30b..4c6c9252 100644
--- a/cmd/template.go
+++ b/cmd/template.go
@@ -2,7 +2,7 @@ package main
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"text/template"
 	"time"
 
@@ -37,7 +37,7 @@ If PATH is not given, will show you the default message that is used.
 				tplStr = common.DefaultGitCommitMessage
 			} else {
 				commitMessageTemplatePath = args[0]
-				tplData, err := ioutil.ReadFile(commitMessageTemplatePath)
+				tplData, err := os.ReadFile(commitMessageTemplatePath)
 				if err != nil {
 					log.Fatalf("%v", err)
 				}
diff --git a/docs/configuration/applications.md b/docs/configuration/applications.md
index c334c4ba..dfbb0f6f 100644
--- a/docs/configuration/applications.md
+++ b/docs/configuration/applications.md
@@ -51,7 +51,7 @@ spec:
   project: default
   source:
     path: helm-guestbook
-    repoURL: https://github.com/argocd-example-apps/argocd-example-apps
+    repoURL: https://github.com/argoproj/argocd-example-apps
     targetRevision: HEAD
 ```
 
diff --git a/ext/git/creds.go b/ext/git/creds.go
index d3262777..c8f64933 100644
--- a/ext/git/creds.go
+++ b/ext/git/creds.go
@@ -5,7 +5,6 @@ import (
 	"crypto/sha256"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"strconv"
 	"strings"
@@ -118,10 +117,10 @@ func (c HTTPSCreds) Environ() (io.Closer, []string, error) {
 		// We need to actually create two temp files, one for storing cert data and
 		// another for storing the key. If we fail to create second fail, the first
 		// must be removed.
-		certFile, err := ioutil.TempFile(argoio.TempDir, "")
+		certFile, err := os.CreateTemp(argoio.TempDir, "")
 		if err == nil {
 			defer certFile.Close()
-			keyFile, err = ioutil.TempFile(argoio.TempDir, "")
+			keyFile, err = os.CreateTemp(argoio.TempDir, "")
 			if err != nil {
 				removeErr := os.Remove(certFile.Name())
 				if removeErr != nil {
@@ -204,7 +203,7 @@ func (f authFilePaths) Close() error {
 
 func (c SSHCreds) Environ() (io.Closer, []string, error) {
 	// use the SHM temp dir from util, more secure
-	file, err := ioutil.TempFile(argoio.TempDir, "")
+	file, err := os.CreateTemp(argoio.TempDir, "")
 	if err != nil {
 		return nil, nil, err
 	}
@@ -275,10 +274,10 @@ func (g GitHubAppCreds) Environ() (io.Closer, []string, error) {
 		// We need to actually create two temp files, one for storing cert data and
 		// another for storing the key. If we fail to create second fail, the first
 		// must be removed.
-		certFile, err := ioutil.TempFile(argoio.TempDir, "")
+		certFile, err := os.CreateTemp(argoio.TempDir, "")
 		if err == nil {
 			defer certFile.Close()
-			keyFile, err = ioutil.TempFile(argoio.TempDir, "")
+			keyFile, err = os.CreateTemp(argoio.TempDir, "")
 			if err != nil {
 				removeErr := os.Remove(certFile.Name())
 				if removeErr != nil {
diff --git a/ext/git/git_test.go b/ext/git/git_test.go
index 8738b751..de044545 100644
--- a/ext/git/git_test.go
+++ b/ext/git/git_test.go
@@ -2,7 +2,7 @@ package git
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -137,11 +137,11 @@ func TestCustomHTTPClient(t *testing.T) {
 	assert.NoError(t, err)
 	assert.NotEqual(t, "", keyFile)
 
-	certData, err := ioutil.ReadFile(certFile)
+	certData, err := os.ReadFile(certFile)
 	assert.NoError(t, err)
 	assert.NotEqual(t, "", string(certData))
 
-	keyData, err := ioutil.ReadFile(keyFile)
+	keyData, err := os.ReadFile(keyFile)
 	assert.NoError(t, err)
 	assert.NotEqual(t, "", string(keyData))
 
@@ -245,7 +245,7 @@ func TestLFSClient(t *testing.T) {
 	// TODO(alexmt): dockerize tests in and enabled it
 	t.Skip()
 
-	tempDir, err := ioutil.TempDir("", "git-client-lfs-test-")
+	tempDir, err := os.MkdirTemp("", "git-client-lfs-test-")
 	assert.NoError(t, err)
 	if err == nil {
 		defer func() { _ = os.RemoveAll(tempDir) }()
@@ -275,7 +275,7 @@ func TestLFSClient(t *testing.T) {
 	assert.NoError(t, err)
 	if err == nil {
 		defer fileHandle.Close()
-		text, err := ioutil.ReadAll(fileHandle)
+		text, err := io.ReadAll(fileHandle)
 		assert.NoError(t, err)
 		if err == nil {
 			assert.Equal(t, "This is not a YAML, sorry.\n", string(text))
@@ -284,7 +284,7 @@ func TestLFSClient(t *testing.T) {
 }
 
 func TestVerifyCommitSignature(t *testing.T) {
-	p, err := ioutil.TempDir("", "test-verify-commit-sig")
+	p, err := os.MkdirTemp("", "test-verify-commit-sig")
 	if err != nil {
 		panic(err.Error())
 	}
@@ -343,7 +343,7 @@ func TestNewFactory(t *testing.T) {
 			test.Flaky(t)
 		}
 
-		dirName, err := ioutil.TempDir("", "git-client-test-")
+		dirName, err := os.MkdirTemp("", "git-client-test-")
 		assert.NoError(t, err)
 		defer func() { _ = os.RemoveAll(dirName) }()
 
@@ -381,7 +381,7 @@ func TestNewFactory(t *testing.T) {
 }
 
 func TestListRevisions(t *testing.T) {
-	dir, err := ioutil.TempDir("", "test-list-revisions")
+	dir, err := os.MkdirTemp("", "test-list-revisions")
 	if err != nil {
 		panic(err.Error())
 	}
diff --git a/pkg/argocd/git.go b/pkg/argocd/git.go
index d97d0a56..6aa4b421 100644
--- a/pkg/argocd/git.go
+++ b/pkg/argocd/git.go
@@ -5,7 +5,6 @@ import (
 	"crypto/sha256"
 	"encoding/hex"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
@@ -136,7 +135,7 @@ func commitChangesGit(app *v1alpha1.Application, wbc *WriteBackConfig, changeLis
 	}
 	var gitC git.Client
 	if wbc.GitClient == nil {
-		tempRoot, err := ioutil.TempDir(os.TempDir(), fmt.Sprintf("git-%s", app.Name))
+		tempRoot, err := os.MkdirTemp(os.TempDir(), fmt.Sprintf("git-%s", app.Name))
 		if err != nil {
 			return err
 		}
@@ -220,12 +219,12 @@ func commitChangesGit(app *v1alpha1.Application, wbc *WriteBackConfig, changeLis
 
 	commitOpts := &git.CommitOptions{}
 	if wbc.GitCommitMessage != "" {
-		cm, err := ioutil.TempFile("", "image-updater-commit-msg")
+		cm, err := os.CreateTemp("", "image-updater-commit-msg")
 		if err != nil {
 			return fmt.Errorf("cold not create temp file: %v", err)
 		}
 		logCtx.Debugf("Writing commit message to %s", cm.Name())
-		err = ioutil.WriteFile(cm.Name(), []byte(wbc.GitCommitMessage), 0600)
+		err = os.WriteFile(cm.Name(), []byte(wbc.GitCommitMessage), 0600)
 		if err != nil {
 			_ = cm.Close()
 			return fmt.Errorf("could not write commit message to %s: %v", cm.Name(), err)
@@ -269,7 +268,7 @@ func writeOverrides(app *v1alpha1.Application, wbc *WriteBackConfig, gitC git.Cl
 	// our generated new file is the same as the existing one, and if yes, we
 	// don't proceed further for commit.
 	if targetExists {
-		data, err := ioutil.ReadFile(targetFile)
+		data, err := os.ReadFile(targetFile)
 		if err != nil {
 			return err, false
 		}
@@ -279,7 +278,7 @@ func writeOverrides(app *v1alpha1.Application, wbc *WriteBackConfig, gitC git.Cl
 		}
 	}
 
-	err = ioutil.WriteFile(targetFile, override, 0600)
+	err = os.WriteFile(targetFile, override, 0600)
 	if err != nil {
 		return
 	}
diff --git a/pkg/argocd/update_test.go b/pkg/argocd/update_test.go
index c18e3ee9..ea5cdccf 100644
--- a/pkg/argocd/update_test.go
+++ b/pkg/argocd/update_test.go
@@ -3,7 +3,6 @@ package argocd
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -1816,7 +1815,7 @@ func Test_CommitUpdates(t *testing.T) {
 		gitMock, dir, cleanup := mockGit(t)
 		defer cleanup()
 		kf := filepath.Join(dir, "kustomization.yml")
-		assert.NoError(t, ioutil.WriteFile(kf, []byte(`
+		assert.NoError(t, os.WriteFile(kf, []byte(`
 kind: Kustomization
 apiVersion: kustomize.config.k8s.io/v1beta1
 
@@ -1838,7 +1837,7 @@ replacements: []
 
 		err = commitChanges(app, wbc, nil)
 		assert.NoError(t, err)
-		kust, err := ioutil.ReadFile(kf)
+		kust, err := os.ReadFile(kf)
 		assert.NoError(t, err)
 		assert.YAMLEq(t, `
 kind: Kustomization
@@ -1857,7 +1856,7 @@ replacements: []
 		app.Spec.Source.Kustomize.Images = v1alpha1.KustomizeImages{"foo:123", "bar=qux"}
 		err = commitChanges(app, wbc, nil)
 		assert.NoError(t, err)
-		kust, err = ioutil.ReadFile(kf)
+		kust, err = os.ReadFile(kf)
 		assert.NoError(t, err)
 		assert.YAMLEq(t, `
 kind: Kustomization
@@ -2044,7 +2043,7 @@ func Test_parseTarget(t *testing.T) {
 }
 
 func mockGit(t *testing.T) (gitMock *gitmock.Client, dir string, cleanup func()) {
-	dir, err := ioutil.TempDir("", "wb-kust")
+	dir, err := os.MkdirTemp("", "wb-kust")
 	assert.NoError(t, err)
 	gitMock = &gitmock.Client{}
 	gitMock.On("Root").Return(dir)
diff --git a/pkg/registry/config.go b/pkg/registry/config.go
index 05926484..0b6dbe95 100644
--- a/pkg/registry/config.go
+++ b/pkg/registry/config.go
@@ -2,7 +2,7 @@ package registry
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"time"
 
 	"github.com/argoproj-labs/argocd-image-updater/pkg/log"
@@ -40,7 +40,7 @@ func clearRegistries() {
 // LoadRegistryConfiguration loads a YAML-formatted registry configuration from
 // a given file at path.
 func LoadRegistryConfiguration(path string, clear bool) error {
-	registryBytes, err := ioutil.ReadFile(path)
+	registryBytes, err := os.ReadFile(path)
 	if err != nil {
 		return err
 	}
diff --git a/test/fixture/capture.go b/test/fixture/capture.go
index 57073bb8..cf09ed36 100644
--- a/test/fixture/capture.go
+++ b/test/fixture/capture.go
@@ -1,7 +1,7 @@
 package fixture
 
 import (
-	"io/ioutil"
+	"io"
 	"os"
 )
 
@@ -22,7 +22,7 @@ func CaptureStdout(callback func()) (string, error) {
 
 	w.Close()
 
-	data, err := ioutil.ReadAll(r)
+	data, err := io.ReadAll(r)
 
 	if err != nil {
 		return "", err
@@ -46,7 +46,7 @@ func CaptureStderr(callback func()) (string, error) {
 	callback()
 	w.Close()
 
-	data, err := ioutil.ReadAll(r)
+	data, err := io.ReadAll(r)
 
 	if err != nil {
 		return "", err
diff --git a/test/fixture/fileutil.go b/test/fixture/fileutil.go
index ce75911a..7820b72d 100644
--- a/test/fixture/fileutil.go
+++ b/test/fixture/fileutil.go
@@ -1,12 +1,12 @@
 package fixture
 
-// Fixture functions for tests related to files
+import "os"
 
-import "io/ioutil"
+// Fixture functions for tests related to files
 
 // MustReadFile must read a file from given path. Panics if it can't.
 func MustReadFile(path string) string {
-	retBytes, err := ioutil.ReadFile(path)
+	retBytes, err := os.ReadFile(path)
 	if err != nil {
 		panic(err)
 	}