diff --git a/_examples/dkim-proxy/main.go b/_examples/dkim-proxy/main.go
index 5e33132..ed2673d 100644
--- a/_examples/dkim-proxy/main.go
+++ b/_examples/dkim-proxy/main.go
@@ -4,7 +4,6 @@ package main
 import (
 	"bytes"
 	"flag"
-	"io/ioutil"
 	"log"
 	"net/smtp"
 
@@ -60,7 +59,7 @@ func main() {
 		log.Fatalf("DKIM configuration error: %v", err)
 	}
 
-	privKey, err = ioutil.ReadFile(*privKeyFile)
+	privKey, err = io.ReadFile(*privKeyFile)
 	if err != nil {
 		log.Fatalf("Couldn't read private key: %v", err)
 	}
diff --git a/envelope.go b/envelope.go
index 0fa4fe1..32f4661 100644
--- a/envelope.go
+++ b/envelope.go
@@ -20,7 +20,6 @@ func (env *Envelope) AddReceivedLine(peer Peer) {
 	tlsDetails := ""
 
 	tlsVersions := map[uint16]string{
-		tls.VersionSSL30: "SSL3.0",
 		tls.VersionTLS10: "TLS1.0",
 		tls.VersionTLS11: "TLS1.1",
 		tls.VersionTLS12: "TLS1.2",
diff --git a/example_test.go b/example_test.go
index a61241e..2eb172a 100644
--- a/example_test.go
+++ b/example_test.go
@@ -5,7 +5,7 @@ import (
 	"net/smtp"
 	"strings"
 
-	"github.com/chrj/smtpd"
+	"git.jmbit.de/jmb/smtpd"
 )
 
 func ExampleServer() {
diff --git a/go.mod b/go.mod
index a883ba1..69293f1 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
-module github.com/chrj/smtpd
+module git.jmbit.de/jmb/smtpd
 
-go 1.14
+go 1.24
diff --git a/protocol.go b/protocol.go
index a047f02..13fbdb0 100644
--- a/protocol.go
+++ b/protocol.go
@@ -7,7 +7,6 @@ import (
 	"encoding/base64"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"net/textproto"
 	"strconv"
@@ -288,6 +287,7 @@ func (session *session) handleRCPT(cmd command) {
 }
 
 func (session *session) handleSTARTTLS(cmd command) {
+  _ = cmd
 
 	if session.tls {
 		session.reply(502, "Already running in TLS")
@@ -334,6 +334,7 @@ func (session *session) handleSTARTTLS(cmd command) {
 }
 
 func (session *session) handleDATA(cmd command) {
+  _ = cmd
 
 	if session.envelope == nil || len(session.envelope.Recipients) == 0 {
 		session.reply(502, "Missing RCPT TO command.")
@@ -371,7 +372,7 @@ func (session *session) handleDATA(cmd command) {
 	}
 
 	// Discard the rest and report an error.
-	_, err = io.Copy(ioutil.Discard, reader)
+	_, err = io.Copy(io.Discard, reader)
 
 	if err != nil {
 		// Network error, ignore
@@ -390,17 +391,20 @@ func (session *session) handleDATA(cmd command) {
 }
 
 func (session *session) handleRSET(cmd command) {
+  _ = cmd
 	session.reset()
 	session.reply(250, "Go ahead")
 	return
 }
 
 func (session *session) handleNOOP(cmd command) {
+  _ = cmd
 	session.reply(250, "Go ahead")
 	return
 }
 
 func (session *session) handleQUIT(cmd command) {
+  _ = cmd
 	session.reply(221, "OK, bye")
 	session.close()
 	return
diff --git a/smtpd.go b/smtpd.go
index 852ff30..e60e2a1 100644
--- a/smtpd.go
+++ b/smtpd.go
@@ -190,7 +190,7 @@ func (srv *Server) Serve(l net.Listener) error {
 			default:
 			}
 
-			if ne, ok := e.(net.Error); ok && ne.Temporary() {
+			if ne, ok := e.(net.Error); ok && ne.Timeout() {
 				time.Sleep(time.Second)
 				continue
 			}
diff --git a/smtpd_test.go b/smtpd_test.go
index 3f8488a..ad6c251 100644
--- a/smtpd_test.go
+++ b/smtpd_test.go
@@ -14,7 +14,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/chrj/smtpd"
+	"git.jmbit.de/jmb/smtpd"
 )
 
 var localhostCert = []byte(`-----BEGIN CERTIFICATE-----