diff --git a/contactcard.go b/contactcard.go
index 1bd6578..38071d8 100644
--- a/contactcard.go
+++ b/contactcard.go
@@ -7,7 +7,7 @@ import (
 	"image"
 	"image/color"
 	"image/png"
-	"io/ioutil"
+	"io"
 	"log"
 	"math"
 	"os"
@@ -71,7 +71,7 @@ func NewContactCardFromCompressed(compressed []byte) (*ContactCard, error) {
 	if err != nil {
 		return nil, err
 	}
-	output, err := ioutil.ReadAll(gzreader)
+	output, err := io.ReadAll(gzreader)
 	if err != nil {
 		return nil, err
 	}
@@ -94,7 +94,7 @@ func (contact *ContactCard) WriteCompressed(filename string) error {
 	if err != nil {
 		return err
 	}
-	err = ioutil.WriteFile(filename, out, 0600)
+	err = os.WriteFile(filename, out, 0600)
 	if err != nil {
 		return err
 	}
diff --git a/endtoend_test.go b/endtoend_test.go
index 845e694..3a64d47 100644
--- a/endtoend_test.go
+++ b/endtoend_test.go
@@ -3,7 +3,7 @@ package meowlib_test
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"testing"
 
 	"forge.redroom.link/yves/meowlib"
@@ -74,7 +74,7 @@ func TestEndToEnd(t *testing.T) {
 		}
 
 		a, _ = json.Marshal(Me)
-		ioutil.WriteFile("id.json", a, 0644)
+		os.WriteFile("id.json", a, 0644)
 		fmt.Println(string(a))
 		/////////////////////////////////////
 		// Create a message to that friend //
diff --git a/message.go b/message.go
index ea227af..0efa679 100644
--- a/message.go
+++ b/message.go
@@ -13,7 +13,7 @@ func (msg *UserMessage) AddFile(filename string, maxMessageSize int64) error {
 		return err
 	}
 	if fi.Size() > maxMessageSize {
-		return errors.New("Cannot add file, file bigger than messge size")
+		return errors.New("cannot add file, file bigger than messge size")
 	}
 	var totalsize int64
 	totalsize = 0
@@ -22,7 +22,7 @@ func (msg *UserMessage) AddFile(filename string, maxMessageSize int64) error {
 	}
 	totalsize += fi.Size()
 	if totalsize > maxMessageSize {
-		return errors.New("Cannot add file, too many files, max message size exceeded")
+		return errors.New("cannot add file, too many files, max message size exceeded")
 	}
 	data, err := os.ReadFile(filename)
 	if err != nil {
diff --git a/proto_test.go b/proto_test.go
index 44b4e07..284824c 100644
--- a/proto_test.go
+++ b/proto_test.go
@@ -1,8 +1,8 @@
 package meowlib_test
 
 import (
-	"io/ioutil"
 	"log"
+	"os"
 	"testing"
 
 	"forge.redroom.link/yves/meowlib"
@@ -19,10 +19,10 @@ func TestServerMessageSerialization(t *testing.T) {
 	if err != nil {
 		log.Fatalln("Failed to encode address book:", err)
 	}
-	if err := ioutil.WriteFile("test", out, 0644); err != nil {
+	if err := os.WriteFile("test", out, 0644); err != nil {
 		log.Fatalln("Failed to write address book:", err)
 	}
-	in, err := ioutil.ReadFile("test")
+	in, err := os.ReadFile("test")
 	if err != nil {
 		log.Fatalln("Error reading file:", err)
 	}