diff --git a/Retailcrm/Versions/V5/References.cs b/Retailcrm/Versions/V5/References.cs
index 2a724cf..9a23f47 100644
--- a/Retailcrm/Versions/V5/References.cs
+++ b/Retailcrm/Versions/V5/References.cs
@@ -65,7 +65,7 @@ namespace Retailcrm.Versions.V5
             }
 
             return Request.MakeRequest(
-                $"/reference/cost-groups/{group["code"].ToString()}/edit",
+                $"/reference/cost-groups/{@group["code"]}/edit",
                 Request.MethodPost,
                 new Dictionary<string, object>
                 {
@@ -108,7 +108,7 @@ namespace Retailcrm.Versions.V5
             }
 
             return Request.MakeRequest(
-                $"/reference/cost-items/{item["code"].ToString()}/edit",
+                $"/reference/cost-items/{item["code"]}/edit",
                 Request.MethodPost,
                 new Dictionary<string, object>
                 {
@@ -145,7 +145,7 @@ namespace Retailcrm.Versions.V5
             }
 
             return Request.MakeRequest(
-                $"/reference/legal-entities/{entity["code"].ToString()}/edit",
+                $"/reference/legal-entities/{entity["code"]}/edit",
                 Request.MethodPost,
                 new Dictionary<string, object>
                 {
@@ -153,5 +153,42 @@ namespace Retailcrm.Versions.V5
                 }
             );
         }
+
+        public Response Couriers()
+        {
+            return Request.MakeRequest(
+                "/reference/couriers",
+                Request.MethodGet
+            );
+        }
+
+        public Response CouriersCreate(Dictionary<string, object> courier)
+        {
+            return Request.MakeRequest(
+                "/reference/couriers/create",
+                Request.MethodPost,
+                new Dictionary<string, object>
+                {
+                    { "courier", new JavaScriptSerializer().Serialize(courier) }
+                }
+            );
+        }
+
+        public Response CouriersEdit(Dictionary<string, object> courier)
+        {
+            if (!courier.ContainsKey("id"))
+            {
+                throw new ArgumentException("Parameter `id` is missing");
+            }
+
+            return Request.MakeRequest(
+                $"/reference/couriers/{courier["id"]}/edit",
+                Request.MethodPost,
+                new Dictionary<string, object>
+                {
+                    { "courier", new JavaScriptSerializer().Serialize(courier) }
+                }
+            );
+        }
     }
 }
diff --git a/RetailcrmUnitTest/V5/ReferencesTest.cs b/RetailcrmUnitTest/V5/ReferencesTest.cs
index 662a87d..1a9ba72 100644
--- a/RetailcrmUnitTest/V5/ReferencesTest.cs
+++ b/RetailcrmUnitTest/V5/ReferencesTest.cs
@@ -129,5 +129,80 @@ namespace RetailcrmUnitTest.V5
             Assert.IsInstanceOfType(response, typeof(Response));
             Assert.IsTrue(response.GetResponse().ContainsKey("success"));
         }
+
+        [TestMethod]
+        public void Couriers()
+        {
+            Response response = _client.Couriers();
+            Assert.IsTrue(response.IsSuccessfull());
+            Assert.IsTrue(response.GetStatusCode() == 200);
+            Assert.IsInstanceOfType(response, typeof(Response));
+            Assert.IsTrue(response.GetResponse().ContainsKey("couriers"));
+        }
+
+        [TestMethod]
+        public void CouriersCreate()
+        {
+            string guid = Guid.NewGuid().ToString().Replace("-", string.Empty).Substring(0, 3);
+
+            Response response = _client.CouriersCreate(
+                new Dictionary<string, object>
+                {
+                    { "firstName", $"CourierFirstName-{guid}"},
+                    { "lastName", $"CourierLastName-{guid}" },
+                    { "active", false},
+                    { "email", $"{guid}@example.com"}
+                }
+            );
+
+            Debug.WriteLine(response.GetRawResponse());
+
+            Assert.IsTrue(response.IsSuccessfull());
+            Assert.IsTrue(response.GetStatusCode() == 201);
+            Assert.IsInstanceOfType(response, typeof(Response));
+            Assert.IsTrue(response.GetResponse().ContainsKey("success"));
+        }
+
+        [TestMethod]
+        public void CouriersEdit()
+        {
+            string guid = Guid.NewGuid().ToString().Replace("-", string.Empty).Substring(0, 3);
+
+            Response response = _client.CouriersCreate(
+                new Dictionary<string, object>
+                {
+                    { "firstName", $"CourierFirstName-{guid}"},
+                    { "lastName", $"CourierLastName-{guid}" },
+                    { "active", false},
+                    { "email", $"{guid}@example.com"}
+                }
+            );
+
+            Debug.WriteLine(response.GetRawResponse());
+
+            Assert.IsTrue(response.IsSuccessfull());
+            Assert.IsTrue(response.GetStatusCode() == 201);
+            Assert.IsInstanceOfType(response, typeof(Response));
+            Assert.IsTrue(response.GetResponse().ContainsKey("success"));
+
+            string id = response.GetResponse()["id"].ToString();
+
+            Response responseEdit = _client.CouriersEdit(
+                new Dictionary<string, object>
+                {
+                    { "id", id},
+                    { "firstName", "CourierFirstName"},
+                    { "lastName", "CourierLastName" },
+                    { "active", true}
+                }
+            );
+
+            Debug.WriteLine(responseEdit.GetRawResponse());
+
+            Assert.IsTrue(responseEdit.IsSuccessfull());
+            Assert.IsTrue(responseEdit.GetStatusCode() == 200);
+            Assert.IsInstanceOfType(response, typeof(Response));
+            Assert.IsTrue(response.GetResponse().ContainsKey("success"));
+        }
     }
 }