diff --git a/cmd/yggdrasil/main.go b/cmd/yggdrasil/main.go
index 58b8230d..30cdd5e5 100644
--- a/cmd/yggdrasil/main.go
+++ b/cmd/yggdrasil/main.go
@@ -8,7 +8,7 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"os"
 	"os/signal"
@@ -51,10 +51,10 @@ func readConfig(log *log.Logger, useconf bool, useconffile string, normaliseconf
 	var err error
 	if useconffile != "" {
 		// Read the file from the filesystem
-		conf, err = ioutil.ReadFile(useconffile)
+		conf, err = os.ReadFile(useconffile)
 	} else {
 		// Read the file from stdin.
-		conf, err = ioutil.ReadAll(os.Stdin)
+		conf, err = io.ReadAll(os.Stdin)
 	}
 	if err != nil {
 		panic(err)
diff --git a/cmd/yggdrasilctl/cmd_line_env.go b/cmd/yggdrasilctl/cmd_line_env.go
index bd6df8fc..c1acacd6 100644
--- a/cmd/yggdrasilctl/cmd_line_env.go
+++ b/cmd/yggdrasilctl/cmd_line_env.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 
@@ -61,7 +60,7 @@ func (cmdLineEnv *CmdLineEnv) parseFlagsAndArgs() {
 
 func (cmdLineEnv *CmdLineEnv) setEndpoint(logger *log.Logger) {
 	if cmdLineEnv.server == cmdLineEnv.endpoint {
-		if config, err := ioutil.ReadFile(defaults.GetDefaults().DefaultConfigFile); err == nil {
+		if config, err := os.ReadFile(defaults.GetDefaults().DefaultConfigFile); err == nil {
 			if bytes.Equal(config[0:2], []byte{0xFF, 0xFE}) ||
 				bytes.Equal(config[0:2], []byte{0xFE, 0xFF}) {
 				utf := unicode.UTF16(unicode.BigEndian, unicode.UseBOM)
diff --git a/src/core/core.go b/src/core/core.go
index 0332980b..f77648b2 100644
--- a/src/core/core.go
+++ b/src/core/core.go
@@ -6,7 +6,7 @@ import (
 	"encoding/hex"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"net/url"
 	"time"
@@ -48,7 +48,7 @@ func (c *Core) _init() error {
 	c.config.RLock()
 	defer c.config.RUnlock()
 	if c.log == nil {
-		c.log = log.New(ioutil.Discard, "", 0)
+		c.log = log.New(io.Discard, "", 0)
 	}
 
 	sigPriv, err := hex.DecodeString(c.config.PrivateKey)