diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b41e433..7915026 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v3
         with:
-          go-version: 1.18
+          go-version: 1.19
       - uses: actions/checkout@v3
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
@@ -51,7 +51,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        goversion: ["1.17", "1.18"]
+        goversion: ["1.17", "1.18", "1.19"]
 
     name: Build & Test (Linux, Go ${{ matrix.goversion }})
     needs: [lint]
@@ -75,7 +75,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        goversion: ["1.17", "1.18"]
+        goversion: ["1.17", "1.18", "1.19"]
 
     name: Build & Test (Windows, Go ${{ matrix.goversion }})
     needs: [lint]
@@ -99,7 +99,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        goversion: ["1.17", "1.18"]
+        goversion: ["1.17", "1.18", "1.19"]
 
     name: Build & Test (macOS, Go ${{ matrix.goversion }})
     needs: [lint]
@@ -148,7 +148,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.18
+          go-version: 1.19
 
       - name: Build package
         env:
@@ -180,7 +180,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.18
+          go-version: 1.19
 
       - name: Build package
         env:
@@ -212,7 +212,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.18
+          go-version: 1.19
 
       - name: Build package
         run: sh contrib/msi/build-msi.sh ${{ matrix.pkgarch }}
@@ -248,7 +248,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.18
+          go-version: 1.19
 
       - name: Build package
         env:
diff --git a/cmd/yggdrasil/main.go b/cmd/yggdrasil/main.go
index 7f75183..5d1c76a 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 bd6df8f..c1acacd 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 f41b653..37a1d84 100644
--- a/src/core/core.go
+++ b/src/core/core.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"crypto/ed25519"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"net/url"
 	"os"
@@ -67,7 +67,7 @@ func New(secret ed25519.PrivateKey, opts ...SetupOption) (*Core, error) {
 		c._applyOption(opt)
 	}
 	if c.log == nil {
-		c.log = log.New(ioutil.Discard, "", 0)
+		c.log = log.New(io.Discard, "", 0)
 	}
 	c.proto.init(c)
 	if err := c.links.init(c); err != nil {