diff --git a/kv_test.go b/kv_test.go
index 10c15f69..95873cee 100644
--- a/kv_test.go
+++ b/kv_test.go
@@ -78,7 +78,7 @@ func TestRunNWithKV(t *testing.T) {
 	go func() {
 		time.Sleep(50 * time.Millisecond)
 		ops.SetKV("email", "test@example.com")
-		ops.SetKV("map", map[string]interface{}{
+		ops.SetKV("map", map[string]any{
 			"str": "hello",
 			"int": 123,
 		})
diff --git a/operator.go b/operator.go
index 5bd9c52f..2ab88b11 100644
--- a/operator.go
+++ b/operator.go
@@ -20,6 +20,7 @@ import (
 
 	"github.com/k1LoW/concgroup"
 	"github.com/k1LoW/donegroup"
+	"github.com/k1LoW/maskedio"
 	"github.com/k1LoW/runn/exprtrace"
 	"github.com/k1LoW/runn/internal/deprecation"
 	"github.com/k1LoW/stopw"
@@ -83,6 +84,7 @@ type operator struct {
 	runResult       *RunResult
 	dbg             *dbg
 	hasRunnerRunner bool
+	maskRule        *maskedio.Rule
 
 	mu sync.Mutex
 }
@@ -465,6 +467,7 @@ func New(opts ...Option) (*operator, error) {
 		capturers:      bk.capturers,
 		runResult:      newRunResult(bk.desc, bk.labels, bk.path, bk.included, st),
 		dbg:            newDBG(bk.attach),
+		maskRule:       st.maskRule(),
 	}
 
 	if op.debug {