diff --git a/README.md b/README.md
index 3f78061..fa5c219 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # pkg
 
-![Project status](https://img.shields.io/badge/version-5.5.0-green.svg)
+![Project status](https://img.shields.io/badge/version-5.5.1-green.svg)
 [![Build Status](https://travis-ci.org/go-playground/pkg.svg?branch=master)](https://travis-ci.org/go-playground/pkg)
 [![Coverage Status](https://coveralls.io/repos/github/go-playground/pkg/badge.svg?branch=master)](https://coveralls.io/github/go-playground/pkg?branch=master)
 [![GoDoc](https://godoc.org/github.com/go-playground/pkg?status.svg)](https://pkg.go.dev/mod/github.com/go-playground/pkg/v5)
diff --git a/go.mod b/go.mod
index f2795bb..07c2e50 100644
--- a/go.mod
+++ b/go.mod
@@ -1,7 +1,7 @@
 module github.com/go-playground/pkg/v5
 
 require (
-	github.com/go-playground/assert/v2 v2.0.1
+	github.com/go-playground/assert/v2 v2.2.0
 	github.com/go-playground/form/v4 v4.2.0
 )
 
diff --git a/go.sum b/go.sum
index 15a83ba..0e0881a 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,6 @@
 github.com/go-playground/assert/v2 v2.0.1 h1:MsBgLAaY856+nPRTKrp3/OZK38U/wa0CcBYNjji3q3A=
 github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
+github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
+github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
 github.com/go-playground/form/v4 v4.2.0 h1:N1wh+Goz61e6w66vo8vJkQt+uwZSoLz50kZPJWR8eic=
 github.com/go-playground/form/v4 v4.2.0/go.mod h1:q1a2BY+AQUUzhl6xA/6hBetay6dEIhMHjgvJiGo6K7U=
diff --git a/sync/mutex.go b/sync/mutex.go
index 70e6a67..7c28f5a 100644
--- a/sync/mutex.go
+++ b/sync/mutex.go
@@ -1,11 +1,11 @@
 //go:build go1.18
 
-package sync
+package syncext
 
 import (
 	"sync"
 
-	"github.com/go-playground/pkg/v5/values/result"
+	resultext "github.com/go-playground/pkg/v5/values/result"
 )
 
 // NewMutex creates a new Mutex for use.
@@ -45,11 +45,11 @@ func (m *Mutex[T]) Unlock() {
 
 // TryLock tries to lock Mutex and reports whether it succeeded.
 // If it does the value is returned for use in the Ok result otherwise Err with empty value.
-func (m *Mutex[T]) TryLock() result.Result[T, struct{}] {
+func (m *Mutex[T]) TryLock() resultext.Result[T, struct{}] {
 	if m.m.TryLock() {
-		return result.Ok[T, struct{}](m.value)
+		return resultext.Ok[T, struct{}](m.value)
 	} else {
-		return result.Err[T, struct{}](struct{}{})
+		return resultext.Err[T, struct{}](struct{}{})
 	}
 }
 
@@ -89,11 +89,11 @@ func (m *RWMutex[T]) Unlock() {
 
 // TryLock tries to lock RWMutex and returns the value in the Ok result if successful.
 // If it does the value is returned for use in the Ok result otherwise Err with empty value.
-func (m *RWMutex[T]) TryLock() result.Result[T, struct{}] {
+func (m *RWMutex[T]) TryLock() resultext.Result[T, struct{}] {
 	if m.rw.TryLock() {
-		return result.Ok[T, struct{}](m.value)
+		return resultext.Ok[T, struct{}](m.value)
 	} else {
-		return result.Err[T, struct{}](struct{}{})
+		return resultext.Err[T, struct{}](struct{}{})
 	}
 }
 
@@ -121,10 +121,10 @@ func (m *RWMutex[T]) RUnlock() {
 
 // TryRLock tries to lock RWMutex for reading and returns the value in the Ok result if successful.
 // If it does the value is returned for use in the Ok result otherwise Err with empty value.
-func (m *RWMutex[T]) TryRLock() result.Result[T, struct{}] {
+func (m *RWMutex[T]) TryRLock() resultext.Result[T, struct{}] {
 	if m.rw.TryRLock() {
-		return result.Ok[T, struct{}](m.value)
+		return resultext.Ok[T, struct{}](m.value)
 	} else {
-		return result.Err[T, struct{}](struct{}{})
+		return resultext.Err[T, struct{}](struct{}{})
 	}
 }
diff --git a/sync/mutex_test.go b/sync/mutex_test.go
index 5226bb7..bfd8a56 100644
--- a/sync/mutex_test.go
+++ b/sync/mutex_test.go
@@ -1,6 +1,6 @@
 //go:build go1.18
 
-package sync
+package syncext
 
 import (
 	"testing"
diff --git a/values/option/option.go b/values/option/option.go
index 610fbd7..4e6ed6b 100644
--- a/values/option/option.go
+++ b/values/option/option.go
@@ -1,7 +1,7 @@
 //go:build go1.18
 // +build go1.18
 
-package option
+package optionext
 
 import (
 	"database/sql"
@@ -16,8 +16,7 @@ import (
 //
 // nil is usually used on Go however this has two problems:
 // 1. Checking if the return values is nil is NOT enforced and can lead to panics.
-// 2. Using nil is not good enough when nil itself is a valid values.
-//
+// 2. Using nil is not good enough when nil itself is a valid value.
 type Option[T any] struct {
 	value  T
 	isSome bool
diff --git a/values/option/option_test.go b/values/option/option_test.go
index 6c5439e..19d4f9c 100644
--- a/values/option/option_test.go
+++ b/values/option/option_test.go
@@ -1,7 +1,7 @@
 //go:build go1.18
 // +build go1.18
 
-package option
+package optionext
 
 import (
 	"encoding/json"
diff --git a/values/result/result.go b/values/result/result.go
index 85644f8..f9960b1 100644
--- a/values/result/result.go
+++ b/values/result/result.go
@@ -1,7 +1,7 @@
 //go:build go1.18
 // +build go1.18
 
-package result
+package resultext
 
 // Result represents the result of an operation that is successful or not.
 type Result[T, E any] struct {
diff --git a/values/result/result_test.go b/values/result/result_test.go
index 0b42fac..ce3e719 100644
--- a/values/result/result_test.go
+++ b/values/result/result_test.go
@@ -1,7 +1,7 @@
 //go:build go1.18
 // +build go1.18
 
-package result
+package resultext
 
 import (
 	"errors"