diff --git a/providers/dns/regru/internal/client.go b/providers/dns/regru/internal/client.go
index b4b81dc01e..8d91f4a66f 100644
--- a/providers/dns/regru/internal/client.go
+++ b/providers/dns/regru/internal/client.go
@@ -7,6 +7,7 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"strings"
 	"time"
 
 	"github.com/go-acme/lego/v4/providers/dns/internal/errutils"
@@ -39,8 +40,6 @@ func NewClient(username, password string) *Client {
 // https://www.reg.ru/support/help/api2#zone_remove_record
 func (c Client) RemoveTxtRecord(ctx context.Context, domain, subDomain, content string) error {
 	request := RemoveRecordRequest{
-		Username:          c.username,
-		Password:          c.password,
 		Domains:           []Domain{{DName: domain}},
 		SubDomain:         subDomain,
 		Content:           content,
@@ -60,8 +59,6 @@ func (c Client) RemoveTxtRecord(ctx context.Context, domain, subDomain, content
 // https://www.reg.ru/support/help/api2#zone_add_txt
 func (c Client) AddTXTRecord(ctx context.Context, domain, subDomain, content string) error {
 	request := AddTxtRequest{
-		Username:          c.username,
-		Password:          c.password,
 		Domains:           []Domain{{DName: domain}},
 		SubDomain:         subDomain,
 		Text:              content,
@@ -79,21 +76,27 @@ func (c Client) AddTXTRecord(ctx context.Context, domain, subDomain, content str
 func (c Client) doRequest(ctx context.Context, request any, fragments ...string) (*APIResponse, error) {
 	endpoint := c.baseURL.JoinPath(fragments...)
 
+	query := endpoint.Query()
+	query.Set("username", c.username)
+	query.Set("password", c.password)
+	endpoint.RawQuery = query.Encode()
+
 	inputData, err := json.Marshal(request)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create input data: %w", err)
 	}
 
-	query := endpoint.Query()
-	query.Add("input_data", string(inputData))
-	query.Add("input_format", "json")
-	endpoint.RawQuery = query.Encode()
+	data := url.Values{}
+	data.Set("input_data", string(inputData))
+	data.Set("input_format", "json")
 
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint.String(), http.NoBody)
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint.String(), strings.NewReader(data.Encode()))
 	if err != nil {
 		return nil, fmt.Errorf("unable to create request: %w", err)
 	}
 
+	req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
+
 	resp, err := c.HTTPClient.Do(req)
 	if err != nil {
 		return nil, errutils.NewHTTPDoError(req, err)
diff --git a/providers/dns/regru/internal/types.go b/providers/dns/regru/internal/types.go
index 785b9229f1..6d4d557faa 100644
--- a/providers/dns/regru/internal/types.go
+++ b/providers/dns/regru/internal/types.go
@@ -56,9 +56,6 @@ func (d DomainResponse) Error() string {
 
 // AddTxtRequest is the representation of the payload of a request to add a TXT record.
 type AddTxtRequest struct {
-	Username string `json:"username"`
-	Password string `json:"password"`
-
 	Domains           []Domain `json:"domains,omitempty"`
 	SubDomain         string   `json:"subdomain,omitempty"`
 	Text              string   `json:"text,omitempty"`
@@ -67,9 +64,6 @@ type AddTxtRequest struct {
 
 // RemoveRecordRequest is the representation of the payload of a request to remove a record.
 type RemoveRecordRequest struct {
-	Username string `json:"username"`
-	Password string `json:"password"`
-
 	Domains           []Domain `json:"domains,omitempty"`
 	SubDomain         string   `json:"subdomain,omitempty"`
 	Content           string   `json:"content,omitempty"`