diff --git a/v5/client.go b/v5/client.go
index 06fd460..6544c67 100644
--- a/v5/client.go
+++ b/v5/client.go
@@ -4173,7 +4173,9 @@ func (c *Client) FileEdit(id int, file File) (FileResponse, int, *errs.Failure)
 	var resp FileResponse
 
 	req, _ := json.Marshal(file)
-	data, status, err := c.PostRequest(fmt.Sprintf("/files/%d/edit", id), bytes.NewReader(req))
+	data, status, err := c.PostRequest(fmt.Sprintf("/files/%d/edit", id), url.Values{
+		"file": {string(req)},
+	})
 
 	if err != nil && err.Error() != "" {
 		return resp, status, err
diff --git a/v5/client_test.go b/v5/client_test.go
index e6ed9a7..8f7d2c2 100644
--- a/v5/client_test.go
+++ b/v5/client_test.go
@@ -4764,16 +4764,7 @@ func TestClient_Files(t *testing.T) {
 		MatchParam("limit", "20").
 		MatchParam("page", "1").
 		Reply(200).
-		BodyString(`{
-		  "success": true,
-		  "pagination": {
-		    "limit": 20,
-		    "totalCount": 0,
-		    "currentPage": 1,
-		    "totalPageCount": 0
-		  },
-		  "files": []
-		}`)
+		BodyString(`{"success": true,"pagination": {"limit": 20,"totalCount": 0,"currentPage": 1,"totalPageCount": 0},"files": []}`)
 
 	_, status, err := c.Files(FilesRequest{
 		Limit: 20,
@@ -4826,7 +4817,7 @@ func TestClient_FileUploadFail(t *testing.T) {
 	gock.New(crmURL).
 		Post("/files/upload").
 		Reply(400).
-		BodyString(`{"success": false, "errorMsg": "error"}`)
+		BodyString(`{"success":false,"errorMsg":"Your account doesn't have enough money to upload files."}`)
 
 	_, status, err := c.FileUpload(file)
 	if err.Error() != "" {
diff --git a/v5/response.go b/v5/response.go
index 72467c8..557c6ca 100644
--- a/v5/response.go
+++ b/v5/response.go
@@ -371,7 +371,7 @@ type CostResponse struct {
 type FilesResponse struct {
 	Success    bool        `json:"success"`
 	Pagination *Pagination `json:"pagination,omitempty"`
-	Files      []File      `json:"files,omitempty,brackets"`
+	Files      []File      `json:"files,omitempty"`
 }
 
 // FileUpload response