diff --git a/gitea/admin_test.go b/gitea/admin_test.go
index 40ec11b..fa2244d 100644
--- a/gitea/admin_test.go
+++ b/gitea/admin_test.go
@@ -22,8 +22,7 @@ func TestAdminOrg(t *testing.T) {
 		UserName:    orgName,
 		FullName:    orgName + " FullName",
 		Description: "test adminCreateOrg",
-		// enum: public,limited,private
-		Visibility: "public",
+		Visibility:  VisibleTypePublic,
 	})
 	assert.NoError(t, err)
 	assert.NotEmpty(t, newOrg)
diff --git a/gitea/org.go b/gitea/org.go
index 0e98adb..48ea9da 100644
--- a/gitea/org.go
+++ b/gitea/org.go
@@ -23,6 +23,20 @@ type Organization struct {
 	Visibility  string `json:"visibility"`
 }
 
+// VisibleType defines the visibility
+type VisibleType string
+
+const (
+	// VisibleTypePublic Visible for everyone
+	VisibleTypePublic VisibleType = "public"
+
+	// VisibleTypeLimited Visible for every connected user
+	VisibleTypeLimited VisibleType = "limited"
+
+	// VisibleTypePrivate Visible only for organization's members
+	VisibleTypePrivate VisibleType = "private"
+)
+
 // ListOrgsOptions options for listing organizations
 type ListOrgsOptions struct {
 	ListOptions
@@ -50,18 +64,17 @@ func (c *Client) GetOrg(orgname string) (*Organization, error) {
 
 // CreateOrgOption options for creating an organization
 type CreateOrgOption struct {
-	UserName    string `json:"username"`
-	FullName    string `json:"full_name"`
-	Description string `json:"description"`
-	Website     string `json:"website"`
-	Location    string `json:"location"`
-	// possible values are `public` (default), `limited` or `private`
-	Visibility string `json:"visibility"`
+	UserName    string      `json:"username"`
+	FullName    string      `json:"full_name"`
+	Description string      `json:"description"`
+	Website     string      `json:"website"`
+	Location    string      `json:"location"`
+	Visibility  VisibleType `json:"visibility"`
 }
 
 // checkVisibilityOpt check if mode exist
-func checkVisibilityOpt(v string) bool {
-	return v == "public" || v == "limited" || v == "private"
+func checkVisibilityOpt(v VisibleType) bool {
+	return v == VisibleTypePublic || v == VisibleTypeLimited || v == VisibleTypePrivate
 }
 
 // Validate the CreateOrgOption struct
@@ -90,12 +103,11 @@ func (c *Client) CreateOrg(opt CreateOrgOption) (*Organization, error) {
 
 // EditOrgOption options for editing an organization
 type EditOrgOption struct {
-	FullName    string `json:"full_name"`
-	Description string `json:"description"`
-	Website     string `json:"website"`
-	Location    string `json:"location"`
-	// possible values are `public`, `limited` or `private`
-	Visibility string `json:"visibility"`
+	FullName    string      `json:"full_name"`
+	Description string      `json:"description"`
+	Website     string      `json:"website"`
+	Location    string      `json:"location"`
+	Visibility  VisibleType `json:"visibility"`
 }
 
 // Validate the EditOrgOption struct
diff --git a/gitea/org_type.go b/gitea/org_type.go
deleted file mode 100644
index 930be18..0000000
--- a/gitea/org_type.go
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2019 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
-
-package gitea
-
-// VisibleType defines the visibility (Organization only)
-type VisibleType int
-
-const (
-	// VisibleTypePublic Visible for everyone
-	VisibleTypePublic VisibleType = iota
-
-	// VisibleTypeLimited Visible for every connected user
-	VisibleTypeLimited
-
-	// VisibleTypePrivate Visible only for organization's members
-	VisibleTypePrivate
-)
-
-// ExtractKeysFromMapString provides a slice of keys from map
-func ExtractKeysFromMapString(in map[string]VisibleType) (keys []string) {
-	for k := range in {
-		keys = append(keys, k)
-	}
-	return
-}