diff --git a/cmd/bounce.go b/cmd/bounce.go
index 6f418a4..7bf8201 100644
--- a/cmd/bounce.go
+++ b/cmd/bounce.go
@@ -2,7 +2,7 @@ package main
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"strconv"
 	"time"
@@ -121,7 +121,7 @@ func handleBounceWebhook(c echo.Context) error {
 	)
 
 	// Read the request body instead of using c.Bind() to read to save the entire raw request as meta.
-	rawReq, err := ioutil.ReadAll(c.Request().Body)
+	rawReq, err := io.ReadAll(c.Request().Body)
 	if err != nil {
 		app.log.Printf("error reading ses notification body: %v", err)
 		return echo.NewHTTPError(http.StatusBadRequest, app.i18n.Ts("globals.messages.internalError"))
diff --git a/cmd/import.go b/cmd/import.go
index 9d30a66..42dde37 100644
--- a/cmd/import.go
+++ b/cmd/import.go
@@ -3,7 +3,7 @@ package main
 import (
 	"encoding/json"
 	"io"
-	"io/ioutil"
+	"os"
 	"net/http"
 	"strings"
 
@@ -66,7 +66,7 @@ func handleImportSubscribers(c echo.Context) error {
 	}
 	defer src.Close()
 
-	out, err := ioutil.TempFile("", "listmonk")
+	out, err := os.CreateTemp("", "listmonk")
 	if err != nil {
 		return echo.NewHTTPError(http.StatusInternalServerError,
 			app.i18n.Ts("import.errorCopyingFile", "error", err.Error()))
diff --git a/cmd/install.go b/cmd/install.go
index 5e39a87..3dce054 100644
--- a/cmd/install.go
+++ b/cmd/install.go
@@ -3,7 +3,6 @@ package main
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"regexp"
 	"strings"
@@ -224,7 +223,7 @@ func newConfigFile(path string) error {
 			ReplaceAll(b, []byte(fmt.Sprintf(`admin_password = "%s"`, pwd)))
 	}
 
-	return ioutil.WriteFile(path, b, 0644)
+	return os.WriteFile(path, b, 0644)
 }
 
 // checkSchema checks if the DB schema is installed.
diff --git a/cmd/settings.go b/cmd/settings.go
index 421f4b7..7c0f0d5 100644
--- a/cmd/settings.go
+++ b/cmd/settings.go
@@ -2,7 +2,7 @@ package main
 
 import (
 	"bytes"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"regexp"
 	"runtime"
@@ -244,7 +244,7 @@ func handleTestSMTPSettings(c echo.Context) error {
 	app := c.Get("app").(*App)
 
 	// Copy the raw JSON post body.
-	reqBody, err := ioutil.ReadAll(c.Request().Body)
+	reqBody, err := io.ReadAll(c.Request().Body)
 	if err != nil {
 		app.log.Printf("error reading SMTP test: %v", err)
 		return echo.NewHTTPError(http.StatusBadRequest, app.i18n.Ts("globals.messages.internalError"))
diff --git a/cmd/tx.go b/cmd/tx.go
index 7b4c869..743fcba 100644
--- a/cmd/tx.go
+++ b/cmd/tx.go
@@ -3,7 +3,7 @@ package main
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/textproto"
 	"strings"
@@ -49,7 +49,7 @@ func handleSendTxMessage(c echo.Context) error {
 			}
 			defer file.Close()
 
-			b, err := ioutil.ReadAll(file)
+			b, err := io.ReadAll(file)
 			if err != nil {
 				return echo.NewHTTPError(http.StatusInternalServerError,
 					app.i18n.Ts("globals.messages.invalidFields", "name", fmt.Sprintf("file: %s", err.Error())))
diff --git a/cmd/updates.go b/cmd/updates.go
index af52b67..3f792a3 100644
--- a/cmd/updates.go
+++ b/cmd/updates.go
@@ -2,7 +2,7 @@ package main
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"regexp"
 	"time"
@@ -48,7 +48,7 @@ func checkUpdates(curVersion string, interval time.Duration, app *App) {
 			continue
 		}
 
-		b, err := ioutil.ReadAll(resp.Body)
+		b, err := io.ReadAll(resp.Body)
 		if err != nil {
 			app.log.Printf("error reading remote update payload: %v", err)
 			continue
diff --git a/internal/bounce/webhooks/ses.go b/internal/bounce/webhooks/ses.go
index 536ae67..387b617 100644
--- a/internal/bounce/webhooks/ses.go
+++ b/internal/bounce/webhooks/ses.go
@@ -8,7 +8,7 @@ import (
 	"encoding/pem"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"regexp"
@@ -239,7 +239,7 @@ func (s *SES) getCert(certURL string) (*x509.Certificate, error) {
 		return nil, fmt.Errorf("invalid SNS certificate URL: %v", u.Host)
 	}
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return nil, err
 	}
diff --git a/internal/captcha/captcha.go b/internal/captcha/captcha.go
index a6ab441..fd39cfa 100644
--- a/internal/captcha/captcha.go
+++ b/internal/captcha/captcha.go
@@ -3,7 +3,7 @@ package captcha
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"strings"
@@ -58,7 +58,7 @@ func (c *Captcha) Verify(token string) (error, bool) {
 	}
 
 	defer resp.Body.Close()
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return err, false
 	}
diff --git a/internal/media/providers/filesystem/filesystem.go b/internal/media/providers/filesystem/filesystem.go
index c2e6b1b..a1e0afd 100644
--- a/internal/media/providers/filesystem/filesystem.go
+++ b/internal/media/providers/filesystem/filesystem.go
@@ -4,7 +4,6 @@ import (
 	"crypto/rand"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -67,7 +66,7 @@ func (c *Client) GetURL(name string) string {
 
 // GetBlob accepts a URL, reads the file, and returns the blob.
 func (c *Client) GetBlob(url string) ([]byte, error) {
-	b, err := ioutil.ReadFile(filepath.Join(getDir(c.opts.UploadPath), filepath.Base(url)))
+	b, err := os.ReadFile(filepath.Join(getDir(c.opts.UploadPath), filepath.Base(url)))
 	return b, err
 }
 
diff --git a/internal/media/providers/s3/s3.go b/internal/media/providers/s3/s3.go
index a05ecd8..2bf7eee 100644
--- a/internal/media/providers/s3/s3.go
+++ b/internal/media/providers/s3/s3.go
@@ -3,7 +3,6 @@ package s3
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/url"
 	"path/filepath"
 	"strings"
@@ -123,7 +122,7 @@ func (c *Client) GetBlob(uurl string) ([]byte, error) {
 		return nil, err
 	}
 
-	b, err := ioutil.ReadAll(file)
+	b, err := io.ReadAll(file)
 	if err != nil {
 		return nil, err
 	}
diff --git a/internal/messenger/postback/postback.go b/internal/messenger/postback/postback.go
index 736803d..3cb6c79 100644
--- a/internal/messenger/postback/postback.go
+++ b/internal/messenger/postback/postback.go
@@ -5,7 +5,6 @@ import (
 	"encoding/base64"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/textproto"
 	"time"
@@ -197,7 +196,7 @@ func (p *Postback) exec(method, rURL string, reqBody []byte, headers http.Header
 	}
 	defer func() {
 		// Drain and close the body to let the Transport reuse the connection
-		io.Copy(ioutil.Discard, r.Body)
+		io.Copy(io.Discard, r.Body)
 		r.Body.Close()
 	}()
 
diff --git a/internal/subimporter/importer.go b/internal/subimporter/importer.go
index 17f1159..943e589 100644
--- a/internal/subimporter/importer.go
+++ b/internal/subimporter/importer.go
@@ -15,7 +15,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"net/mail"
 	"os"
@@ -377,7 +376,7 @@ func (s *Session) ExtractZIP(srcPath string, maxCSVs int) (string, []string, err
 	defer z.Close()
 
 	// Create a temporary directory to extract the files.
-	dir, err := ioutil.TempDir("", "listmonk")
+	dir, err := os.MkdirTemp("", "listmonk")
 	if err != nil {
 		s.log.Printf("error creating temporary directory for extracting ZIP: %v", err)
 		return "", nil, err