diff --git a/.env.dist b/.env.dist
new file mode 100644
index 0000000..805f069
--- /dev/null
+++ b/.env.dist
@@ -0,0 +1,5 @@
+RETAILCRM_URL=""
+RETAILCRM_KEY=""
+RETAILCRM_USER=""
+RETAILCRM_SITE=""
+RETAILCRM_VERSION=""
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
index 22da27f..5d551ea 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,4 +7,5 @@ go:
 before_install:
   - go get -v github.com/google/go-querystring/query
   - go get -v github.com/h2non/gock
+  - cp .env.dist .env
 script: go test -v ./...
diff --git a/v5/client.go b/v5/client.go
index d8ce064..532fe97 100644
--- a/v5/client.go
+++ b/v5/client.go
@@ -2779,6 +2779,52 @@ func (c *Client) StoreEdit(store Store) (SuccessfulResponse, int, errs.Failure)
 	return resp, status, err
 }
 
+// Units returns units list
+//
+// For more information see http://www.retailcrm.pro/docs/Developers/ApiVersion5#get--api-v5-reference-units
+func (c *Client) Units() (UnitsResponse, int, errs.Failure) {
+	var resp UnitsResponse
+
+	data, status, err := c.GetRequest("/reference/units")
+	if err.RuntimeErr != nil {
+		return resp, status, err
+	}
+
+	json.Unmarshal(data, &resp)
+
+	if resp.Success == false {
+		return resp, status, buildErr(data)
+	}
+
+	return resp, status, err
+}
+
+// UnitEdit unit create/edit
+//
+// For more information see http://www.retailcrm.pro/docs/Developers/ApiVersion5#post--api-v5-reference-units-code-edit
+func (c *Client) UnitEdit(unit Unit) (SuccessfulResponse, int, errs.Failure) {
+	var resp SuccessfulResponse
+
+	objJSON, _ := json.Marshal(&unit)
+
+	p := url.Values{
+		"unit": {string(objJSON[:])},
+	}
+
+	data, status, err := c.PostRequest(fmt.Sprintf("/reference/units/%s/edit", unit.Code), p)
+	if err.RuntimeErr != nil {
+		return resp, status, err
+	}
+
+	json.Unmarshal(data, &resp)
+
+	if resp.Success == false {
+		return resp, status, buildErr(data)
+	}
+
+	return resp, status, err
+}
+
 // Segments returns segments
 //
 // For more information see http://www.retailcrm.pro/docs/Developers/ApiVersion5#get--api-v5-segments
diff --git a/v5/client_test.go b/v5/client_test.go
index fbb4f37..dbb4301 100644
--- a/v5/client_test.go
+++ b/v5/client_test.go
@@ -3448,6 +3448,107 @@ func TestClient_StoreEdit_Fail(t *testing.T) {
 	}
 }
 
+func TestClient_Units(t *testing.T) {
+	c := client()
+
+	defer gock.Off()
+
+	gock.New(crmURL).
+		Get("/api/v5/reference/units").
+		Reply(200).
+		BodyString(`{"success": true, "units": []}`)
+
+	data, st, err := c.Units()
+	if err.RuntimeErr != nil {
+		t.Errorf("%v", err.Error())
+	}
+
+	if st != http.StatusOK {
+		t.Errorf("%v", err.ApiError())
+	}
+
+	if data.Success != true {
+		t.Errorf("%v", err.ApiError())
+	}
+}
+
+func TestClient_UnitsEdit(t *testing.T) {
+	c := client()
+
+	defer gock.Off()
+
+	unit := Unit{
+		Code:          RandomString(5),
+		Name:          RandomString(5),
+		Sym:           RandomString(2),
+		Default:       false,
+		Active:        true,
+	}
+
+	jr, _ := json.Marshal(&unit)
+
+	p := url.Values{
+		"unit": {string(jr[:])},
+	}
+
+	gock.New(crmURL).
+		Post(fmt.Sprintf("/api/v5/reference/units/%s/edit", unit.Code)).
+		MatchType("url").
+		BodyString(p.Encode()).
+		Reply(201).
+		BodyString(`{"success": true}`)
+
+	data, st, err := c.UnitEdit(unit)
+	if err.RuntimeErr != nil {
+		t.Errorf("%v", err.Error())
+	}
+
+	if !statuses[st] {
+		t.Errorf("%v", err.ApiError())
+	}
+
+	if data.Success != true {
+		t.Errorf("%v", err.ApiError())
+	}
+}
+
+func TestClient_UnitEdit_Fail(t *testing.T) {
+	c := client()
+
+	defer gock.Off()
+
+	unit := Unit{
+		Name:          RandomString(5),
+		Active:        false,
+	}
+
+	jr, _ := json.Marshal(&unit)
+
+	p := url.Values{
+		"store": {string(jr[:])},
+	}
+
+	gock.New(crmURL).
+		Post(fmt.Sprintf("/api/v5/reference/units/%s/edit", unit.Code)).
+		MatchType("url").
+		BodyString(p.Encode()).
+		Reply(404).
+		BodyString(`{"success": false, "errorMsg": "API method not found"}`)
+
+	data, st, err := c.UnitEdit(unit)
+	if err.RuntimeErr != nil {
+		t.Errorf("%v", err.Error())
+	}
+
+	if st < http.StatusBadRequest {
+		t.Error(statusFail)
+	}
+
+	if data.Success != false {
+		t.Error(successFail)
+	}
+}
+
 func TestClient_PackChange(t *testing.T) {
 	c := client()
 	defer gock.Off()
diff --git a/v5/response.go b/v5/response.go
index e68c0cd..f0c3457 100644
--- a/v5/response.go
+++ b/v5/response.go
@@ -398,3 +398,9 @@ type CustomFieldResponse struct {
 	Success     bool         `json:"success"`
 	CustomField CustomFields `json:"customField,omitempty,brackets"`
 }
+
+// UnitsResponse type
+type UnitsResponse struct {
+	Success bool `json:"success"`
+	Units *[]Unit `json:"units,omitempty,brackets"`
+}
diff --git a/v5/types.go b/v5/types.go
index 3fc6cab..410cca2 100644
--- a/v5/types.go
+++ b/v5/types.go
@@ -318,6 +318,7 @@ type Pack struct {
 	DeliveryNoteNumber string    `json:"deliveryNoteNumber,omitempty"`
 	Item               *PackItem `json:"item,omitempty"`
 	ItemID             int       `json:"itemId,omitempty"`
+	Unit               *Unit     `json:"unit,omitempty"`
 }
 
 // PackItem type
@@ -358,6 +359,7 @@ type Offer struct {
 	Properties    map[string]string `json:"properties,omitempty,brackets"`
 	Prices        []OfferPrice      `json:"prices,omitempty,brackets"`
 	Images        []string          `json:"images,omitempty,brackets"`
+	Unit          *Unit             `json:"unit,omitempty,brackets"`
 }
 
 // Inventory type
@@ -404,6 +406,15 @@ type PriceUpload struct {
 	Price float32 `json:"price,omitempty"`
 }
 
+// Unit type
+type Unit struct {
+	Code    string `json:"code"`
+	Name    string `json:"name"`
+	Sym     string `json:"sym"`
+	Default bool   `json:"default,omitempty"`
+	Active  bool   `json:"active,omitempty"`
+}
+
 /**
 User related types
 */