diff --git a/accounts.go b/accounts.go
index b7da163..2e803ea 100644
--- a/accounts.go
+++ b/accounts.go
@@ -78,7 +78,7 @@ type Relationship struct {
 // AccountFollow follow the account.
 func (c *Client) AccountFollow(id int64) (*Relationship, error) {
 	var relationship Relationship
-	err := c.doAPI("POST", fmt.Sprintf("/api/v1/accounts/%d/follow", id), nil, &relationship)
+	err := c.doAPI(http.MethodPost, fmt.Sprintf("/api/v1/accounts/%d/follow", id), nil, &relationship)
 	if err != nil {
 		return nil, err
 	}
@@ -88,7 +88,7 @@ func (c *Client) AccountFollow(id int64) (*Relationship, error) {
 // AccountUnfollow unfollow the account.
 func (c *Client) AccountUnfollow(id int64) (*Relationship, error) {
 	var relationship Relationship
-	err := c.doAPI("POST", fmt.Sprintf("/api/v1/accounts/%d/unfollow", id), nil, &relationship)
+	err := c.doAPI(http.MethodPost, fmt.Sprintf("/api/v1/accounts/%d/unfollow", id), nil, &relationship)
 	if err != nil {
 		return nil, err
 	}
@@ -98,7 +98,7 @@ func (c *Client) AccountUnfollow(id int64) (*Relationship, error) {
 // AccountBlock block the account.
 func (c *Client) AccountBlock(id int64) (*Relationship, error) {
 	var relationship Relationship
-	err := c.doAPI("POST", fmt.Sprintf("/api/v1/accounts/%d/block", id), nil, &relationship)
+	err := c.doAPI(http.MethodPost, fmt.Sprintf("/api/v1/accounts/%d/block", id), nil, &relationship)
 	if err != nil {
 		return nil, err
 	}
@@ -108,7 +108,7 @@ func (c *Client) AccountBlock(id int64) (*Relationship, error) {
 // AccountUnblock unblock the account.
 func (c *Client) AccountUnblock(id int64) (*Relationship, error) {
 	var relationship Relationship
-	err := c.doAPI("POST", fmt.Sprintf("/api/v1/accounts/%d/unblock", id), nil, &relationship)
+	err := c.doAPI(http.MethodPost, fmt.Sprintf("/api/v1/accounts/%d/unblock", id), nil, &relationship)
 	if err != nil {
 		return nil, err
 	}
@@ -118,7 +118,7 @@ func (c *Client) AccountUnblock(id int64) (*Relationship, error) {
 // AccountMute mute the account.
 func (c *Client) AccountMute(id int64) (*Relationship, error) {
 	var relationship Relationship
-	err := c.doAPI("POST", fmt.Sprintf("/api/v1/accounts/%d/mute", id), nil, &relationship)
+	err := c.doAPI(http.MethodPost, fmt.Sprintf("/api/v1/accounts/%d/mute", id), nil, &relationship)
 	if err != nil {
 		return nil, err
 	}
@@ -128,7 +128,7 @@ func (c *Client) AccountMute(id int64) (*Relationship, error) {
 // AccountUnmute unmute the account.
 func (c *Client) AccountUnmute(id int64) (*Relationship, error) {
 	var relationship Relationship
-	err := c.doAPI("POST", fmt.Sprintf("/api/v1/accounts/%d/unmute", id), nil, &relationship)
+	err := c.doAPI(http.MethodPost, fmt.Sprintf("/api/v1/accounts/%d/unmute", id), nil, &relationship)
 	if err != nil {
 		return nil, err
 	}
@@ -168,7 +168,7 @@ func (c *Client) Follow(uri string) (*Account, error) {
 	params.Set("uri", uri)
 
 	var account Account
-	err := c.doAPI("POST", "/api/v1/follows", params, &account)
+	err := c.doAPI(http.MethodPost, "/api/v1/follows", params, &account)
 	if err != nil {
 		return nil, err
 	}
diff --git a/apps.go b/apps.go
index d51b36e..b5a66d2 100644
--- a/apps.go
+++ b/apps.go
@@ -51,7 +51,7 @@ func RegisterApp(appConfig *AppConfig) (*Application, error) {
 	}
 	url.Path = path.Join(url.Path, "/api/v1/apps")
 
-	req, err := http.NewRequest("POST", url.String(), strings.NewReader(params.Encode()))
+	req, err := http.NewRequest(http.MethodPost, url.String(), strings.NewReader(params.Encode()))
 	if err != nil {
 		return nil, err
 	}
diff --git a/mastodon.go b/mastodon.go
index 1112884..cecc2f6 100644
--- a/mastodon.go
+++ b/mastodon.go
@@ -77,7 +77,7 @@ func (c *Client) Authenticate(username, password string) error {
 	}
 	url.Path = path.Join(url.Path, "/oauth/token")
 
-	req, err := http.NewRequest("POST", url.String(), strings.NewReader(params.Encode()))
+	req, err := http.NewRequest(http.MethodPost, url.String(), strings.NewReader(params.Encode()))
 	if err != nil {
 		return err
 	}
@@ -158,7 +158,7 @@ func (c *Client) PostStatus(toot *Toot) (*Status, error) {
 	//params.Set("visibility", "public")
 
 	var status Status
-	err := c.doAPI("POST", "/api/v1/statuses", params, &status)
+	err := c.doAPI(http.MethodPost, "/api/v1/statuses", params, &status)
 	if err != nil {
 		return nil, err
 	}
diff --git a/mastodon_test.go b/mastodon_test.go
index 6b2a570..bc020f2 100644
--- a/mastodon_test.go
+++ b/mastodon_test.go
@@ -195,7 +195,7 @@ func TestGetAccountFollowing(t *testing.T) {
 
 func TestRegisterApp(t *testing.T) {
 	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != "POST" {
+		if r.Method != http.MethodPost {
 			http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
 			return
 		}