diff --git a/pkg/cache/ondisk.go b/pkg/cache/ondisk.go
index 5d7e41b..9186879 100644
--- a/pkg/cache/ondisk.go
+++ b/pkg/cache/ondisk.go
@@ -4,7 +4,7 @@ import (
 	"crypto/sha256"
 	"encoding/hex"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"path"
 	"sync"
@@ -37,12 +37,12 @@ func (c *onDisk) Get(resourceKind, resourceAPIVersion, k8sVersion string) (inter
 		return nil, err
 	}
 
-	return ioutil.ReadAll(f)
+	return io.ReadAll(f)
 }
 
 // Set adds a JSON schema to the schema cache
 func (c *onDisk) Set(resourceKind, resourceAPIVersion, k8sVersion string, schema interface{}) error {
 	c.Lock()
 	defer c.Unlock()
-	return ioutil.WriteFile(cachePath(c.folder, resourceKind, resourceAPIVersion, k8sVersion), schema.([]byte), 0644)
+	return os.WriteFile(cachePath(c.folder, resourceKind, resourceAPIVersion, k8sVersion), schema.([]byte), 0644)
 }
diff --git a/pkg/registry/http.go b/pkg/registry/http.go
index 2af0c6c..9d342d2 100644
--- a/pkg/registry/http.go
+++ b/pkg/registry/http.go
@@ -4,7 +4,7 @@ import (
 	"crypto/tls"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"os"
@@ -99,7 +99,7 @@ func (r SchemaRegistry) DownloadSchema(resourceKind, resourceAPIVersion, k8sVers
 		return url, nil, fmt.Errorf(msg)
 	}
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		msg := fmt.Sprintf("failed parsing schema from %s: %s", url, err)
 		if r.debug {
diff --git a/pkg/registry/http_test.go b/pkg/registry/http_test.go
index 1ab4791..53962c9 100644
--- a/pkg/registry/http_test.go
+++ b/pkg/registry/http_test.go
@@ -3,7 +3,7 @@ package registry
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"strings"
 	"testing"
@@ -50,7 +50,7 @@ func TestDownloadSchema(t *testing.T) {
 			newMockHTTPGetter(func(url string) (resp *http.Response, err error) {
 				return &http.Response{
 					StatusCode: http.StatusNotFound,
-					Body:       ioutil.NopCloser(strings.NewReader("http response mock body")),
+					Body:       io.NopCloser(strings.NewReader("http response mock body")),
 				}, nil
 			}),
 			"http://kubernetesjson.dev",
@@ -66,7 +66,7 @@ func TestDownloadSchema(t *testing.T) {
 			newMockHTTPGetter(func(url string) (resp *http.Response, err error) {
 				return &http.Response{
 					StatusCode: http.StatusServiceUnavailable,
-					Body:       ioutil.NopCloser(strings.NewReader("http response mock body")),
+					Body:       io.NopCloser(strings.NewReader("http response mock body")),
 				}, nil
 			}),
 			"http://kubernetesjson.dev",
@@ -82,7 +82,7 @@ func TestDownloadSchema(t *testing.T) {
 			newMockHTTPGetter(func(url string) (resp *http.Response, err error) {
 				return &http.Response{
 					StatusCode: http.StatusOK,
-					Body:       ioutil.NopCloser(strings.NewReader("http response mock body")),
+					Body:       io.NopCloser(strings.NewReader("http response mock body")),
 				}, nil
 			}),
 			"http://kubernetesjson.dev",
diff --git a/pkg/registry/local.go b/pkg/registry/local.go
index ec9e047..7501290 100644
--- a/pkg/registry/local.go
+++ b/pkg/registry/local.go
@@ -3,7 +3,7 @@ package registry
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"os"
 )
@@ -47,7 +47,7 @@ func (r LocalRegistry) DownloadSchema(resourceKind, resourceAPIVersion, k8sVersi
 	}
 
 	defer f.Close()
-	content, err := ioutil.ReadAll(f)
+	content, err := io.ReadAll(f)
 	if err != nil {
 		msg := fmt.Sprintf("failed to read schema at %s: %s", schemaFile, err)
 		if r.debug {