diff --git a/envplate.go b/envplate.go
index 7848600..9395cab 100644
--- a/envplate.go
+++ b/envplate.go
@@ -1,7 +1,6 @@
 package envplate
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -61,7 +60,7 @@ func (h *Handler) Apply(globs []string) error {
 func (h *Handler) parse(file string) error {
 
 	env := envmap.Import()
-	content, err := ioutil.ReadFile(file)
+	content, err := os.ReadFile(file)
 
 	if err != nil {
 		return Log(ERROR, "Cannot open %s: %v", file, err)
@@ -138,7 +137,7 @@ func (h *Handler) parse(file string) error {
 			return err
 		}
 
-		if err := ioutil.WriteFile(file, []byte(parsed), mode); err != nil {
+		if err := os.WriteFile(file, []byte(parsed), mode); err != nil {
 			return err
 		}
 
diff --git a/helper_test.go b/helper_test.go
index 1403285..058af1d 100644
--- a/helper_test.go
+++ b/helper_test.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 	"testing"
@@ -25,7 +24,7 @@ func _exists(name string) bool {
 
 func _read(t *testing.T, name string) string {
 
-	content, err := ioutil.ReadFile(name)
+	content, err := os.ReadFile(name)
 
 	if err != nil {
 		t.Fatal(fmt.Errorf("error while reading '%s': %v", name, err))
@@ -82,7 +81,7 @@ func _restore(file string) {
 
 func _tmpdir(t *testing.T, f func(string)) {
 
-	dir, err := ioutil.TempDir("", "")
+	dir, err := os.MkdirTemp("", "")
 
 	if err != nil {
 		t.Fatal(err)
@@ -96,7 +95,7 @@ func _tmpdir(t *testing.T, f func(string)) {
 
 func _write(t *testing.T, name, content string, mode os.FileMode) string {
 
-	file, err := ioutil.TempFile("", name)
+	file, err := os.CreateTemp("", name)
 
 	if err != nil {
 		t.Fatalf("Error while opening '%s': %v", name, err)