diff --git a/helper/slice/slices.go b/helper/slice/slices.go
index 8fb1af0..ab07083 100644
--- a/helper/slice/slices.go
+++ b/helper/slice/slices.go
@@ -57,3 +57,9 @@ func Delete[T any](a *[]T, index int) {
 	arr := *a
 	*a = append(arr[:index], arr[index+1:]...)
 }
+
+func Copy[T any](a []T) []T {
+	dst := make([]T, len(a))
+	copy(dst, a)
+	return dst
+}
diff --git a/helper/slice/slices_test.go b/helper/slice/slices_test.go
index cdc150a..0d2cfaa 100644
--- a/helper/slice/slices_test.go
+++ b/helper/slice/slices_test.go
@@ -134,3 +134,34 @@ func TestDelete(t *testing.T) {
 	fmt.Println(a)
 	fmt.Println(b)
 }
+
+func TestCopy(t *testing.T) {
+	type args[T int] struct {
+		a []T
+	}
+	type testCase[T int] struct {
+		name string
+		args args[T]
+		want []T
+	}
+	tests := []testCase[int]{
+		{
+			name: "t1",
+			args: args[int]{
+				a: number.Range(1, 10, 1),
+			},
+			want: number.Range(1, 10, 1),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := Copy(tt.args.a)
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("Copy() = %v, want %v", got, tt.want)
+			}
+			got[9] = 111
+			fmt.Println(tt.args.a)
+			fmt.Println(got)
+		})
+	}
+}
diff --git a/internal/theme/common/common.go b/internal/theme/common/common.go
index ba85789..9e04bf4 100644
--- a/internal/theme/common/common.go
+++ b/internal/theme/common/common.go
@@ -28,6 +28,14 @@ func PluginFn[T any](a []Plugin[T], h Handle, fn Fn[T]) Fn[T] {
 	}, fn)
 }
 
+var plugin = []Plugin[models.Posts]{
+	PasswordProject, Digest,
+}
+
+func Plugins() []Plugin[models.Posts] {
+	return plugin
+}
+
 func Default[T any](t T) T {
 	return t
 }
diff --git a/internal/theme/twentyseventeen/twentyseventeen.go b/internal/theme/twentyseventeen/twentyseventeen.go
index 61b11d6..eebd496 100644
--- a/internal/theme/twentyseventeen/twentyseventeen.go
+++ b/internal/theme/twentyseventeen/twentyseventeen.go
@@ -48,14 +48,12 @@ func Hook(h2 common.Handle) {
 	h.index()
 }
 
-var plugin = []common.Plugin[models.Posts]{
-	common.PasswordProject, common.Digest,
-}
+var plugin = slice.Copy(common.Plugins())
 
 func (h handle) index() {
 	if h.Stats != plugins.Empty404 {
 		posts := h.GinH["posts"].([]models.Posts)
-		posts = slice.Map(posts, common.PluginFn(plugin, h.Handle, common.Default[models.Posts]))
+		posts = slice.Map(posts, common.PluginFn[models.Posts](plugin, h.Handle, common.Default[models.Posts]))
 		p, ok := h.GinH["pagination"]
 		if ok {
 			pp, ok := p.(pagination.ParsePagination)