diff --git a/commands/server.go b/commands/server.go
index c878cac2f..048b13ba3 100644
--- a/commands/server.go
+++ b/commands/server.go
@@ -20,7 +20,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"net/url"
@@ -848,7 +847,7 @@ func (c *serverCommand) serve() error {
 			if err != nil {
 				return err
 			}
-			err = ioutil.WriteFile(readyFile, b, 0777)
+			err = os.WriteFile(readyFile, b, 0777)
 			if err != nil {
 				return err
 			}
diff --git a/main_test.go b/main_test.go
index 5629db3fe..aae8a0a9e 100644
--- a/main_test.go
+++ b/main_test.go
@@ -17,8 +17,8 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"io"
 	"io/fs"
-	"io/ioutil"
 	"log"
 	"net/http"
 	"os"
@@ -203,7 +203,7 @@ var commonTestScriptsParam = testscript.Params{
 				}
 
 				defer resp.Body.Close()
-				body, err := ioutil.ReadAll(resp.Body)
+				body, err := io.ReadAll(resp.Body)
 				if err != nil {
 					return fmt.Errorf("failed to read response body: %v", err)
 				}
diff --git a/tpl/internal/templatefuncsRegistry.go b/tpl/internal/templatefuncsRegistry.go
index eea14372b..c1b01f5a5 100644
--- a/tpl/internal/templatefuncsRegistry.go
+++ b/tpl/internal/templatefuncsRegistry.go
@@ -23,7 +23,6 @@ import (
 	"go/doc"
 	"go/parser"
 	"go/token"
-	"io/ioutil"
 	"log"
 	"os"
 	"path/filepath"
@@ -276,7 +275,7 @@ func getGetTplPackagesGoDoc() map[string]map[string]methodGoDocInfo {
 			basePath = filepath.Join(pwd, "tpl")
 		}
 
-		files, err := ioutil.ReadDir(basePath)
+		files, err := os.ReadDir(basePath)
 		if err != nil {
 			log.Fatal(err)
 		}