diff --git a/decrypt_test.go b/decrypt_test.go
index 2fd04fc..b9798fa 100644
--- a/decrypt_test.go
+++ b/decrypt_test.go
@@ -5,7 +5,7 @@ import (
 	"testing"
 )
 
-func Test_Decrypt(t *testing.T) {
+func Test_Decrypt_V11(t *testing.T) {
 	password := "asdf"
 	content := `$ANSIBLE_VAULT;1.1;AES256
 39663038636438383965366163636163376531336238346239623934393436393938656439643133
@@ -19,6 +19,20 @@ func Test_Decrypt(t *testing.T) {
 	assert.NoError(t, err)
 }
 
+func Test_Decrypt_V12(t *testing.T) {
+	password := "asdf"
+	content := `$ANSIBLE_VAULT;1.2;AES256;label
+39663038636438383965366163636163376531336238346239623934393436393938656439643133
+3638363066366433666438623138373866393763373265320a366635386630336562633763323236
+61616562393964666464653532636436346535616566613434613361303734373734383930323661
+6664306264366235630a643235323438646132656337613434396338396335396439346336613062
+3766
+`
+	result, err := Decrypt(content, password)
+	assert.Equal(t, "hello", result)
+	assert.NoError(t, err)
+}
+
 func Test_DecryptFile(t *testing.T) {
 	password := "asdf"
 	filename := "./testdata/test1/secrets.yaml"
diff --git a/encrypt.go b/encrypt.go
index 1c20884..0656f85 100644
--- a/encrypt.go
+++ b/encrypt.go
@@ -7,6 +7,7 @@ import (
 	"crypto/rand"
 	"crypto/sha256"
 	"encoding/hex"
+	"errors"
 	"io/ioutil"
 	"strings"
 )
@@ -21,15 +22,43 @@ func GenerateRandomBytes(n int) ([]byte, error) {
 	return b, nil
 }
 
-func EncryptFile(filename, password string) (result string, err error) {
+func EncryptFile(filename, password, vaultID string) (result string, err error) {
 	data, err := ioutil.ReadFile(filename)
 	check(err)
-	result, err = Encrypt(string(data), password)
+	if vaultID == "" {
+		result, err = encryptV11(string(data), password)
+	} else {
+		result, err = encryptV12(string(data), password, vaultID)
+	}
 	return
 }
 
+// Encrypt will vault encrypt a piece of data.
+//
+// If a `vaultID` is not an empty string, it will upversion to 1.2, otherwise it will
+// default to using 1.1.
+//
+// `vaultID` must not include `;`. If it does, an error will be thrown.
+func Encrypt(body, password, vaultID string) (result string, err error) {
+	err = checkVaultID(vaultID)
+	if err != nil {
+		return "", err
+	}
+	if vaultID == "" {
+		return encryptV11(body, password)
+	}
+	return encryptV12(body, password, vaultID)
+}
+
+func checkVaultID(vaultID string) error {
+	if strings.Contains(vaultID, ";") {
+		return errors.New("vaultID cannot contain ';'")
+	}
+	return nil
+}
+
 // see https://github.com/ansible/ansible/blob/0b8011436dc7f842b78298848e298f2a57ee8d78/lib/ansible/parsing/vault/__init__.py#L710
-func Encrypt(body, password string) (result string, err error) {
+func encryptV11(body, password string) (result string, err error) {
 	salt, err := GenerateRandomBytes(32)
 	check(err)
 	// salt_64 := "2262970e2309d5da757af6c473b0ed3034209cc0d48a3cc3d648c0b174c22fde"
@@ -42,6 +71,21 @@ func Encrypt(body, password string) (result string, err error) {
 	return
 }
 
+// see https://docs.ansible.com/ansible/latest/user_guide/vault.html#ansible-vault-payload-format-1-1-1-2
+// see https://github.com/ansible/ansible/blob/0f95371131cd41d97ad95c4e8bd983081eb29a2a/lib/ansible/parsing/vault/__init__.py#L581
+func encryptV12(body, password, vaultID string) (result string, err error) {
+	salt, err := GenerateRandomBytes(32)
+	check(err)
+	// salt_64 := "2262970e2309d5da757af6c473b0ed3034209cc0d48a3cc3d648c0b174c22fde"
+	// salt,_ = hex.DecodeString(salt_64)
+	key1, key2, iv := genKeyInitctr(password, salt)
+	ciphertext := createCipherText(body, key1, iv)
+	combined := combineParts(ciphertext, key2, salt)
+	vaultText := hex.EncodeToString([]byte(combined))
+	result = formatOutputV12(vaultText, vaultID)
+	return
+}
+
 func createCipherText(body string, key1, iv []byte) []byte {
 	bs := aes.BlockSize
 	padding := (bs - len(body)%bs)
@@ -77,8 +121,12 @@ func combineParts(ciphertext, key2, salt []byte) string {
 	return combined
 }
 
-// https://github.com/ansible/ansible/blob/0b8011436dc7f842b78298848e298f2a57ee8d78/lib/ansible/parsing/vault/__init__.py#L268
 func formatOutput(vaultText string) string {
+	return formatOutputV11(vaultText)
+}
+
+// https://github.com/ansible/ansible/blob/0b8011436dc7f842b78298848e298f2a57ee8d78/lib/ansible/parsing/vault/__init__.py#L268
+func formatOutputV11(vaultText string) string {
 	heading := "$ANSIBLE_VAULT"
 	version := "1.1"
 	cipherName := "AES256"
@@ -103,3 +151,30 @@ func formatOutput(vaultText string) string {
 	whole := strings.Join(elements, "\n")
 	return whole
 }
+
+func formatOutputV12(vaultText, vaultIDText string) string {
+	heading := "$ANSIBLE_VAULT"
+	version := "1.2"
+	cipherName := "AES256"
+
+	headerElements := make([]string, 4)
+	headerElements[0] = heading
+	headerElements[1] = version
+	headerElements[2] = cipherName
+	headerElements[3] = vaultIDText
+	header := strings.Join(headerElements, ";")
+
+	elements := make([]string, 1)
+	elements[0] = header
+	for i := 0; i < len(vaultText); i += 80 {
+		end := i + 80
+		if end > len(vaultText) {
+			end = len(vaultText)
+		}
+		elements = append(elements, vaultText[i:end])
+	}
+	elements = append(elements, "")
+
+	whole := strings.Join(elements, "\n")
+	return whole
+}
diff --git a/encrypt_test.go b/encrypt_test.go
index 1eaaad2..c591f2b 100644
--- a/encrypt_test.go
+++ b/encrypt_test.go
@@ -5,12 +5,12 @@ import (
 	"testing"
 )
 
-func Test_Encrypt(t *testing.T) {
+func Test_Encrypt_V11(t *testing.T) {
 	password := "asdf"
 	body := "secret"
 	var encrypted string
 	var err error
-	encrypted, err = Encrypt(body, password)
+	encrypted, err = Encrypt(body, password, "")
 	assert.NoError(t, err)
 
 	var result string
@@ -18,3 +18,58 @@ func Test_Encrypt(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, body, result)
 }
+
+func Test_Encrypt_V12(t *testing.T) {
+	password := "asdf"
+	body := "secret"
+	var encrypted string
+	var err error
+	encrypted, err = Encrypt(body, password, "test")
+	assert.NoError(t, err)
+
+	var result string
+	result, err = Decrypt(encrypted, password)
+	assert.NoError(t, err)
+	assert.Equal(t, body, result)
+}
+
+func Test_encryptV11(t *testing.T) {
+	password := "asdf"
+	body := "secret"
+	var encrypted string
+	var err error
+	encrypted, err = encryptV11(body, password)
+	assert.NoError(t, err)
+
+	var result string
+	result, err = Decrypt(encrypted, password)
+	assert.NoError(t, err)
+	assert.Equal(t, body, result)
+}
+
+func Test_encryptV12(t *testing.T) {
+	password := "asdf"
+	body := "secret"
+	vaultID := "label"
+	var encrypted string
+	var err error
+	encrypted, err = encryptV12(body, password, vaultID)
+	assert.NoError(t, err)
+
+	var result string
+	result, err = Decrypt(encrypted, password)
+	assert.NoError(t, err)
+	assert.Equal(t, body, result)
+}
+
+func Test_checkvaultID(t *testing.T) {
+	var err error
+	err = checkVaultID("")
+	assert.NoError(t, err)
+
+	err = checkVaultID("1-)90$#98klascalkkDADQXASdasd=-=+_+_=-=")
+	assert.NoError(t, err)
+
+	err = checkVaultID("a;b")
+	assert.Error(t, err)
+}