diff --git a/go.mod b/go.mod
index bbcaf30..b03ef86 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/gocomply/metaschema
 
-go 1.18
+go 1.21
 
 require (
 	github.com/iancoleman/strcase v0.3.0
diff --git a/metaschema/generate.go b/metaschema/generate.go
index e334410..d88fac7 100644
--- a/metaschema/generate.go
+++ b/metaschema/generate.go
@@ -4,7 +4,6 @@ import (
 	"encoding/xml"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"strings"
 
@@ -13,7 +12,7 @@ import (
 )
 
 func Generate(metaschemaDir, goModule, outputDir string) error {
-	files, err := ioutil.ReadDir(metaschemaDir)
+	files, err := os.ReadDir(metaschemaDir)
 	if err != nil {
 		return err
 	}
diff --git a/metaschema/templates/template.go b/metaschema/templates/template.go
index 9484332..bed22bf 100644
--- a/metaschema/templates/template.go
+++ b/metaschema/templates/template.go
@@ -5,7 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"go/format"
-	"io/ioutil"
+	"io"
 	"os"
 	"path/filepath"
 	"strings"
@@ -81,7 +81,7 @@ func newTemplate(baseDir, templateName string) (*template.Template, error) {
 	}
 	defer in.Close()
 
-	tempText, err := ioutil.ReadAll(in)
+	tempText, err := io.ReadAll(in)
 	if err != nil {
 		return nil, err
 	}