diff --git a/cmd_credential.go b/cmd_credential.go
index 7158be2..85b75ae 100644
--- a/cmd_credential.go
+++ b/cmd_credential.go
@@ -22,7 +22,7 @@ import (
 	"github.com/jcmturner/gokrb5/v8/spnego"
 )
 
-func credFetch(server, username string, noKerberos bool, logf func(string, ...interface{})) (*ExecCredential, error) {
+func credFetch(server, username string, noKerberos bool, logf func(string, ...any)) (*ExecCredential, error) {
 	url := strings.TrimRight(server, "/") + "/credential"
 
 	// ── Kerberos SPNEGO ───────────────────────────────────────────────────────
@@ -58,7 +58,7 @@ func credFetch(server, username string, noKerberos bool, logf func(string, ...in
 	return credParse(body)
 }
 
-func credFetchKerberos(url string, logf func(string, ...interface{})) ([]byte, error) {
+func credFetchKerberos(url string, logf func(string, ...any)) ([]byte, error) {
 	krb5cfgPath := krb5ConfigPath()
 	logf("Kerberos: loading config from %s", krb5cfgPath)
 	krb5cfg, err := config.Load(krb5cfgPath)
@@ -104,7 +104,7 @@ func credFetchKerberos(url string, logf func(string, ...interface{})) ([]byte, e
 	return body, nil
 }
 
-func credFetchBasic(url, username, password string, logf func(string, ...interface{})) ([]byte, error) {
+func credFetchBasic(url, username, password string, logf func(string, ...any)) ([]byte, error) {
 	req, err := http.NewRequest(http.MethodGet, url, nil)
 	if err != nil {
 		return nil, fmt.Errorf("building request: %w", err)
@@ -166,7 +166,7 @@ func credCacheFile(serverURL string) string {
 	return filepath.Join(credCacheDir(), fmt.Sprintf("%x.json", h))
 }
 
-func credReadCache(serverURL string, logf func(string, ...interface{})) (*ExecCredential, bool) {
+func credReadCache(serverURL string, logf func(string, ...any)) (*ExecCredential, bool) {
 	path := credCacheFile(serverURL)
 	logf("cache: checking %s", path)
 
diff --git a/main.go b/main.go
index 3b877af..5e74620 100644
--- a/main.go
+++ b/main.go
@@ -264,7 +264,7 @@ Debug output goes to stderr (kubectl surfaces this to the terminal):
 				server += ":8443"
 			}
 
-			logf := func(format string, a ...interface{}) {
+			logf := func(format string, a ...any) {
 				if debugFlag {
 					fmt.Fprintf(os.Stderr, "[ward] "+format+"\n", a...)
 				}