diff --git a/unseal.go b/unseal.go
index 9c5ba7b..fe8da43 100644
--- a/unseal.go
+++ b/unseal.go
@@ -6,17 +6,18 @@ import (
 	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"strings"
 )
 
-var help bool
-var cmd string
-var group string
-var execargs []string
+var (
+	help     bool
+	cmd      string
+	group    string
+	execargs []string
+)
 
 var secretsFile string
 
@@ -63,12 +64,12 @@ func system(command string, pipe bool, args ...string) (string, string, error) {
 	}
 
 	if !pipe {
-		stdout, err = ioutil.ReadAll(stdoutPipe)
+		stdout, err = io.ReadAll(stdoutPipe)
 		if err != nil {
 			return "", "", err
 		}
 
-		stderr, err = ioutil.ReadAll(stderrPipe)
+		stderr, err = io.ReadAll(stderrPipe)
 		if err != nil {
 			return "", "", err
 		}
@@ -202,7 +203,7 @@ func wrap() {
 
 	insertEnvironment(parseEnvironment(decrypt()))
 
-	_, _, err := system(execargs[0], true, execargs[1:len(execargs)]...)
+	_, _, err := system(execargs[0], true, execargs[1:]...)
 	if err != nil {
 		fmt.Fprintln(os.Stderr, "Error executing external command: ", err)
 	}
@@ -244,12 +245,12 @@ func editFile(file string) error {
 func copyFile(oldpath, newpath string) error {
 	err := os.Rename(oldpath, newpath)
 	if err != nil {
-		byteArr, err2 := ioutil.ReadFile(oldpath)
+		byteArr, err2 := os.ReadFile(oldpath)
 		if err2 != nil {
 			return err2
 		}
 
-		err2 = ioutil.WriteFile(newpath, byteArr, mode)
+		err2 = os.WriteFile(newpath, byteArr, mode)
 		if err2 == nil {
 			_ = os.Remove(oldpath)
 		} else {