x509.go | 8 ++++----

diff --git a/x509.go b/x509.go
index 9129ee88cc1c666bbf360b26183cca232b297e3322700146bf6e0508b8001572..c546ac1f3fd22c2be6290826144437ad6423ac098d197cb828c18160627547bc 100644
--- a/x509.go
+++ b/x509.go
@@ -21,12 +21,12 @@ import (
 	"crypto/x509"
 	"encoding/pem"
 	"errors"
-	"io/ioutil"
+	"os"
 )
 
 func CertificateFromFile(p string) (b []byte, c *x509.Certificate, err error) {
 	var data []byte
-	data, err = ioutil.ReadFile(p)
+	data, err = os.ReadFile(p)
 	if err != nil {
 		return
 	}
@@ -48,7 +48,7 @@ }
 
 func PrivateKeyFromFile(p string) (prv interface{}, err error) {
 	var data []byte
-	data, err = ioutil.ReadFile(p)
+	data, err = os.ReadFile(p)
 	if err != nil {
 		return
 	}
@@ -73,7 +73,7 @@ }
 
 func CertPoolFromFile(p string) (certs []*x509.Certificate, pool *x509.CertPool, err error) {
 	var data []byte
-	data, err = ioutil.ReadFile(p)
+	data, err = os.ReadFile(p)
 	if err != nil {
 		return
 	}