diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8e0f912..0fdfdfe 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -6,12 +6,12 @@ jobs:
   test:
     name: Test
     runs-on: ${{ matrix.os }}
-    
+
     strategy:
       matrix:
         os: [ubuntu-latest, macOS-latest, windows-latest]
-        go: ['1.18.x', '1.22.x']
-        
+        go: ['1.21.x', '1.22.x']
+
     steps:
 
       - name: Set git to use LF
@@ -23,7 +23,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up Go ${{ matrix.go }}
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go }}
         id: go
diff --git a/README.md b/README.md
index 268ab5d..4c35848 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,11 @@
 # validator
 
-[![Go](https://github.com/issue9/validator/workflows/Test/badge.svg)](https://github.com/issue9/validator/actions?query=workflow%3ATest)
-[![Go Report Card](https://goreportcard.com/badge/github.com/issue9/validator)](https://goreportcard.com/report/github.com/issue9/validator)
-![License](https://img.shields.io/github/license/issue9/validator)
-[![Go version](https://img.shields.io/github/go-mod/go-version/issue9/validator)](https://golang.org)
-[![codecov](https://codecov.io/gh/issue9/validator/branch/master/graph/badge.svg)](https://codecov.io/gh/issue9/validator)
-[![PkgGoDev](https://pkg.go.dev/badge/github.com/issue9/validator)](https://pkg.go.dev/github.com/issue9/validator)
+[![Go](https://github.com/issue9/webfilter/workflows/Test/badge.svg)](https://github.com/issue9/webfilter/actions?query=workflow%3ATest)
+[![Go Report Card](https://goreportcard.com/badge/github.com/issue9/webfilter)](https://goreportcard.com/report/github.com/issue9/webfilter)
+![License](https://img.shields.io/github/license/issue9/webfilter)
+[![Go version](https://img.shields.io/github/go-mod/go-version/issue9/webfilter)](https://golang.org)
+[![codecov](https://codecov.io/gh/issue9/webfilter/branch/master/graph/badge.svg)](https://codecov.io/gh/issue9/webfilter)
+[![PkgGoDev](https://pkg.go.dev/badge/github.com/issue9/webfilter)](https://pkg.go.dev/github.com/issue9/webfilter)
 
 符合 [web/filter](https://github.com/issue9/web) 的过滤器。
 
diff --git a/go.mod b/go.mod
index ff3f34f..8e39dcb 100644
--- a/go.mod
+++ b/go.mod
@@ -1,8 +1,5 @@
 module github.com/issue9/filter
 
-go 1.18
+go 1.21
 
-require (
-	github.com/issue9/assert/v4 v4.1.1
-	github.com/issue9/sliceutil v0.15.1
-)
+require github.com/issue9/assert/v4 v4.1.1
diff --git a/go.sum b/go.sum
index fd7d3e2..e03cb71 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,2 @@
 github.com/issue9/assert/v4 v4.1.1 h1:OhPE8SB8n/qZCNGLQa+6MQtr/B3oON0JAVj68k8jJlc=
 github.com/issue9/assert/v4 v4.1.1/go.mod h1:v7qDRXi7AsaZZNh8eAK2rkLJg5/clztqQGA1DRv9Lv4=
-github.com/issue9/sliceutil v0.15.1 h1:mV1VlQSO5E8sh2ab6pypLg7TdgGZlDb30E8quli01xY=
-github.com/issue9/sliceutil v0.15.1/go.mod h1:ldun6sT4/bOJxuMtOXhtc6P7GCwE7L+avV86HNks7qk=
diff --git a/validator/number.go b/validator/cmp.go
similarity index 58%
rename from validator/number.go
rename to validator/cmp.go
index 2be5238..7ef1b48 100644
--- a/validator/number.go
+++ b/validator/cmp.go
@@ -4,15 +4,10 @@
 
 package validator
 
-// TODO(go1.21): 改为 cmd.Ordered
-type Number interface {
-	float32 | float64 |
-		~int | ~int8 | ~int16 | ~int32 | ~int64 |
-		~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64
-}
+import "cmp"
 
 // Between 判断数值区间 (min, max)
-func Between[T Number](min, max T) func(T) bool {
+func Between[T cmp.Ordered](min, max T) func(T) bool {
 	if max < min {
 		panic("max 必须大于等于 min")
 	}
@@ -21,7 +16,7 @@ func Between[T Number](min, max T) func(T) bool {
 }
 
 // BetweenEqual 判断数值区间 [min, max]
-func BetweenEqual[T Number](min, max T) func(T) bool {
+func BetweenEqual[T cmp.Ordered](min, max T) func(T) bool {
 	if max < min {
 		panic("max 必须大于等于 min")
 	}
@@ -29,19 +24,19 @@ func BetweenEqual[T Number](min, max T) func(T) bool {
 	return func(val T) bool { return val >= min && val <= max }
 }
 
-func Less[T Number](num T) func(T) bool {
+func Less[T cmp.Ordered](num T) func(T) bool {
 	return func(t T) bool { return t < num }
 }
 
-func LessEqual[T Number](num T) func(T) bool {
+func LessEqual[T cmp.Ordered](num T) func(T) bool {
 	return func(t T) bool { return t <= num }
 }
 
-func Great[T Number](num T) func(T) bool {
+func Great[T cmp.Ordered](num T) func(T) bool {
 	return func(t T) bool { return t > num }
 }
 
-func GreatEqual[T Number](num T) func(T) bool {
+func GreatEqual[T cmp.Ordered](num T) func(T) bool {
 	return func(t T) bool { return t >= num }
 }
 
@@ -49,6 +44,7 @@ func GreatEqual[T Number](num T) func(T) bool {
 func HTTPStatus(s int) bool { return BetweenEqual(100, 599)(s) }
 
 // ZeroOr 判断值为零值或是非零情况下符合 v 的要求
-func ZeroOr[T Number](v func(T) bool) func(T) bool {
-	return Or(func(v T) bool { return v == 0 }, v)
+func ZeroOr[T cmp.Ordered](v func(T) bool) func(T) bool {
+	var zero T
+	return Or(func(v T) bool { return v == zero }, v)
 }
diff --git a/validator/number_test.go b/validator/cmp_test.go
similarity index 100%
rename from validator/number_test.go
rename to validator/cmp_test.go
diff --git a/validator/slice.go b/validator/slice.go
index 74d4b1b..25b33ff 100644
--- a/validator/slice.go
+++ b/validator/slice.go
@@ -4,15 +4,13 @@
 
 package validator
 
-import "github.com/issue9/sliceutil"
+import "slices"
 
 // In 声明枚举类型的验证规则
 //
 // 要求验证的值必须包含在 element 元素中，如果不存在，则返回 msg 的内容。
 func In[T comparable](element ...T) func(T) bool {
-	return func(v T) bool {
-		return sliceutil.Exists(element, func(elem T, _ int) bool { return elem == v })
-	}
+	return func(v T) bool { return slices.Index(element, v) >= 0 }
 }
 
 // NotIn 声明不在枚举中的验证规则