diff --git a/README.md b/README.md
index 29fa3d3..4519d38 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 <div align="center" style="text-align: center;">
 
 ![Go version](https://img.shields.io/badge/go-%3E%3D1.16<recommend>-9cf)
-[![Release](https://img.shields.io/badge/release-1.1.8-green.svg)](https://github.com/duke-git/lancet/releases)
+[![Release](https://img.shields.io/badge/release-1.1.9-green.svg)](https://github.com/duke-git/lancet/releases)
 [![GoDoc](https://godoc.org/github.com//duke-git/lancet?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet)
 [![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet)](https://goreportcard.com/report/github.com/duke-git/lancet)
 [![codecov](https://codecov.io/gh/duke-git/lancet/branch/main/graph/badge.svg?token=FC48T1F078)](https://codecov.io/gh/duke-git/lancet)
diff --git a/README_zh-CN.md b/README_zh-CN.md
index 49a8914..754870e 100644
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -6,7 +6,7 @@
 <div align="center" style="text-align: center;">
 
 ![Go version](https://img.shields.io/badge/go-%3E%3D1.16<recommend>-9cf)
-[![Release](https://img.shields.io/badge/release-1.1.8-green.svg)](https://github.com/duke-git/lancet/releases)
+[![Release](https://img.shields.io/badge/release-1.1.9-green.svg)](https://github.com/duke-git/lancet/releases)
 [![GoDoc](https://godoc.org/github.com//duke-git/lancet?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet)
 [![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet)](https://goreportcard.com/report/github.com/duke-git/lancet)
 [![codecov](https://codecov.io/gh/duke-git/lancet/branch/main/graph/badge.svg?token=FC48T1F078)](https://codecov.io/gh/duke-git/lancet)
diff --git a/internal/assert.go b/internal/assert.go
index 80d42f5..3e817d8 100644
--- a/internal/assert.go
+++ b/internal/assert.go
@@ -18,7 +18,7 @@ const (
 	compareGreater
 )
 
-// Assert is a simple implementation of assertion, only for internal useage
+// Assert is a simple implementation of assertion, only for internal usage
 type Assert struct {
 	T        *testing.T
 	CaseName string
@@ -154,9 +154,8 @@ func compare(x, y interface{}) int {
 	default:
 		if reflect.DeepEqual(x, y) {
 			return compareEqual
-		} else {
-			return compareNotEqual
 		}
+		return compareNotEqual
 	}
 
 	return compareNotEqual
diff --git a/slice/slice_test.go b/slice/slice_test.go
index 20a1e0f..3e60fef 100644
--- a/slice/slice_test.go
+++ b/slice/slice_test.go
@@ -381,7 +381,7 @@ func TestDifference(t *testing.T) {
 	assert.Equal([]int{1, 2, 3}, Difference(s1, s2))
 }
 
-func TestSortByField(t *testing.T) {
+func TestSortByFielDesc(t *testing.T) {
 	assert := internal.NewAssert(t, "TestWithout")
 
 	type student struct {
@@ -407,6 +407,32 @@ func TestSortByField(t *testing.T) {
 	assert.Equal(students, studentsOfSortByAge)
 }
 
+func TestSortByFieldAsc(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSortByField")
+
+	type student struct {
+		name string
+		age  int
+	}
+	students := []student{
+		{"a", 10},
+		{"b", 15},
+		{"c", 5},
+		{"d", 6},
+	}
+	studentsOfSortByAge := []student{
+		{"c", 5},
+		{"d", 6},
+		{"a", 10},
+		{"b", 15},
+	}
+
+	err := SortByField(students, "age")
+	assert.IsNil(err)
+
+	assert.Equal(students, studentsOfSortByAge)
+}
+
 func TestWithout(t *testing.T) {
 	assert := internal.NewAssert(t, "TestWithout")
 	assert.Equal([]int{3, 4, 5}, Without([]int{1, 2, 3, 4, 5}, 1, 2))