diff --git a/README.md b/README.md
index 9788929..fad742a 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@
 </a>
 
 <a href="https://codecov.io/gh/atomicgo/stack">
-<!-- unittestcount:start --><img src="https://img.shields.io/badge/Unit_Tests-23-magenta?style=flat-square" alt="Unit test count"><!-- unittestcount:end -->
+<!-- unittestcount:start --><img src="https://img.shields.io/badge/Unit_Tests-0-magenta?style=flat-square" alt="Unit test count"><!-- unittestcount:end -->
 </a>
 
 <a href="https://opensource.org/licenses/MIT" target="_blank">
@@ -73,20 +73,21 @@ Package stack is a simple implemntation of a stack data structure. It uses gener
 
 ## Index
 
-- [type Stack](<#type-stack>)
-  - [func New[T any]() Stack[T]](<#func-new>)
-  - [func (s *Stack[T]) Clear()](<#func-stackt-clear>)
-  - [func (s *Stack[T]) Contains(item T) bool](<#func-stackt-contains>)
-  - [func (s *Stack[T]) IsEmpty() bool](<#func-stackt-isempty>)
-  - [func (s *Stack[T]) Peek() T](<#func-stackt-peek>)
-  - [func (s *Stack[T]) Pop() T](<#func-stackt-pop>)
-  - [func (s *Stack[T]) PopSafe() T](<#func-stackt-popsafe>)
-  - [func (s *Stack[T]) Push(item ...T)](<#func-stackt-push>)
-  - [func (s *Stack[T]) Size() int](<#func-stackt-size>)
-  - [func (s Stack[T]) String() string](<#func-stackt-string>)
-  - [func (s *Stack[T]) Values() []T](<#func-stackt-values>)
-
-
+- [type Stack](<#Stack>)
+  - [func New\[T any\]\(\) Stack\[T\]](<#New>)
+  - [func \(s \*Stack\[T\]\) Clear\(\)](<#Stack[T].Clear>)
+  - [func \(s \*Stack\[T\]\) Contains\(item T\) bool](<#Stack[T].Contains>)
+  - [func \(s \*Stack\[T\]\) IsEmpty\(\) bool](<#Stack[T].IsEmpty>)
+  - [func \(s \*Stack\[T\]\) Peek\(\) T](<#Stack[T].Peek>)
+  - [func \(s \*Stack\[T\]\) Pop\(\) T](<#Stack[T].Pop>)
+  - [func \(s \*Stack\[T\]\) PopSafe\(\) T](<#Stack[T].PopSafe>)
+  - [func \(s \*Stack\[T\]\) Push\(item ...T\)](<#Stack[T].Push>)
+  - [func \(s \*Stack\[T\]\) Size\(\) int](<#Stack[T].Size>)
+  - [func \(s Stack\[T\]\) String\(\) string](<#Stack[T].String>)
+  - [func \(s \*Stack\[T\]\) Values\(\) \[\]T](<#Stack[T].Values>)
+
+
+<a name="Stack"></a>
 ## type [Stack](<https://github.com/atomicgo/stack/blob/main/stack.go#L9-L11>)
 
 Stack is a simple implementation of a stack data structure.
@@ -97,6 +98,7 @@ type Stack[T any] struct {
 }
 ```
 
+<a name="New"></a>
 ### func [New](<https://github.com/atomicgo/stack/blob/main/stack.go#L14>)
 
 ```go
@@ -108,6 +110,8 @@ New returns a new stack.
 <details><summary>Example</summary>
 <p>
 
+
+
 ```go
 package main
 
@@ -123,6 +127,7 @@ func main() {
 </p>
 </details>
 
+<a name="Stack[T].Clear"></a>
 ### func \(\*Stack\[T\]\) [Clear](<https://github.com/atomicgo/stack/blob/main/stack.go#L58>)
 
 ```go
@@ -134,6 +139,8 @@ Clear removes all items from the stack.
 <details><summary>Example</summary>
 <p>
 
+
+
 ```go
 package main
 
@@ -164,6 +171,7 @@ func main() {
 </p>
 </details>
 
+<a name="Stack[T].Contains"></a>
 ### func \(\*Stack\[T\]\) [Contains](<https://github.com/atomicgo/stack/blob/main/stack.go#L63>)
 
 ```go
@@ -175,6 +183,8 @@ Contains returns true if the stack contains the item.
 <details><summary>Example</summary>
 <p>
 
+
+
 ```go
 package main
 
@@ -205,6 +215,7 @@ false
 </p>
 </details>
 
+<a name="Stack[T].IsEmpty"></a>
 ### func \(\*Stack\[T\]\) [IsEmpty](<https://github.com/atomicgo/stack/blob/main/stack.go#L43>)
 
 ```go
@@ -216,6 +227,8 @@ IsEmpty returns true if the stack is empty.
 <details><summary>Example</summary>
 <p>
 
+
+
 ```go
 package main
 
@@ -249,6 +262,7 @@ true
 </p>
 </details>
 
+<a name="Stack[T].Peek"></a>
 ### func \(\*Stack\[T\]\) [Peek](<https://github.com/atomicgo/stack/blob/main/stack.go#L53>)
 
 ```go
@@ -257,6 +271,7 @@ func (s *Stack[T]) Peek() T
 
 Peek returns the top item of the stack without removing it.
 
+<a name="Stack[T].Pop"></a>
 ### func \(\*Stack\[T\]\) [Pop](<https://github.com/atomicgo/stack/blob/main/stack.go#L25>)
 
 ```go
@@ -268,6 +283,8 @@ Pop removes an item from the stack and returns it. Panics if the stack is empty.
 <details><summary>Example</summary>
 <p>
 
+
+
 ```go
 package main
 
@@ -298,6 +315,7 @@ Hello
 </p>
 </details>
 
+<a name="Stack[T].PopSafe"></a>
 ### func \(\*Stack\[T\]\) [PopSafe](<https://github.com/atomicgo/stack/blob/main/stack.go#L34>)
 
 ```go
@@ -309,6 +327,8 @@ PopSafe removes an item from the stack and returns it. Returns the zero value of
 <details><summary>Example</summary>
 <p>
 
+
+
 ```go
 package main
 
@@ -340,6 +360,7 @@ Hello
 </p>
 </details>
 
+<a name="Stack[T].Push"></a>
 ### func \(\*Stack\[T\]\) [Push](<https://github.com/atomicgo/stack/blob/main/stack.go#L19>)
 
 ```go
@@ -351,6 +372,8 @@ Push adds items to a stack.
 <details><summary>Example</summary>
 <p>
 
+
+
 ```go
 package main
 
@@ -379,6 +402,7 @@ func main() {
 </p>
 </details>
 
+<a name="Stack[T].Size"></a>
 ### func \(\*Stack\[T\]\) [Size](<https://github.com/atomicgo/stack/blob/main/stack.go#L48>)
 
 ```go
@@ -390,6 +414,8 @@ Size returns the size of the stack.
 <details><summary>Example</summary>
 <p>
 
+
+
 ```go
 package main
 
@@ -418,15 +444,20 @@ func main() {
 </p>
 </details>
 
+<a name="Stack[T].String"></a>
 ### func \(Stack\[T\]\) [String](<https://github.com/atomicgo/stack/blob/main/stack.go#L77>)
 
 ```go
 func (s Stack[T]) String() string
 ```
 
+
+
 <details><summary>Example</summary>
 <p>
 
+
+
 ```go
 package main
 
@@ -455,6 +486,7 @@ func main() {
 </p>
 </details>
 
+<a name="Stack[T].Values"></a>
 ### func \(\*Stack\[T\]\) [Values](<https://github.com/atomicgo/stack/blob/main/stack.go#L73>)
 
 ```go
@@ -466,6 +498,8 @@ Values returns the values of the stack as a slice.
 <details><summary>Example</summary>
 <p>
 
+
+
 ```go
 package main
 
@@ -494,8 +528,6 @@ func main() {
 </p>
 </details>
 
-
-
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