diff --git a/actions.go b/actions.go
index bccac68..f478203 100644
--- a/actions.go
+++ b/actions.go
@@ -14,11 +14,11 @@ const (
 	// ReadAction means that the event was a previous recipient reading their respective
 	// messages.
 	ReadAction
-	// PostBackAction represents post call back
+	// PostBackAction represents post call back.
 	PostBackAction
-	// OptInAction represents opting in through the Send to Messenger button
+	// OptInAction represents opting in through the Send to Messenger button.
 	OptInAction
-	// ReferralAction represents ?ref parameter in m.me URLs
+	// ReferralAction represents ?ref parameter in m.me URLs.
 	ReferralAction
 	// AccountLinkingAction means that the event concerns changes in account linking
 	// status.
diff --git a/message.go b/message.go
index 5f1bf96..2a5ad2f 100644
--- a/message.go
+++ b/message.go
@@ -56,7 +56,7 @@ type Read struct {
 	Seq int `json:"seq"`
 }
 
-// PostBack represents postback callback
+// PostBack represents postback callback.
 type PostBack struct {
 	// Sender is who the message was sent from.
 	Sender Sender `json:"-"`
@@ -94,7 +94,7 @@ func (r Read) Watermark() time.Time {
 }
 
 // GetNLP simply unmarshals the NLP entities to the given struct and returns
-// an error if it's not possible
+// an error if it's not possible.
 func (m *Message) GetNLP(i interface{}) error {
 	return json.Unmarshal(m.NLP, &i)
 }
diff --git a/messenger.go b/messenger.go
index 53a6fda..e97abaa 100644
--- a/messenger.go
+++ b/messenger.go
@@ -135,17 +135,17 @@ func (m *Messenger) HandleRead(f ReadHandler) {
 	m.readHandlers = append(m.readHandlers, f)
 }
 
-// HandlePostBack adds a new PostBackHandler to the Messenger
+// HandlePostBack adds a new PostBackHandler to the Messenger.
 func (m *Messenger) HandlePostBack(f PostBackHandler) {
 	m.postBackHandlers = append(m.postBackHandlers, f)
 }
 
-// HandleReferral adds a new ReferralHandler to the Messenger
+// HandleReferral adds a new ReferralHandler to the Messenger.
 func (m *Messenger) HandleReferral(f ReferralHandler) {
 	m.referralHandlers = append(m.referralHandlers, f)
 }
 
-// HandleAccountLinking adds a new AccountLinkingHandler to the Messenger
+// HandleAccountLinking adds a new AccountLinkingHandler to the Messenger.
 func (m *Messenger) HandleAccountLinking(f AccountLinkingHandler) {
 	m.accountLinkingHandlers = append(m.accountLinkingHandlers, f)
 }
@@ -163,7 +163,7 @@ func (m *Messenger) Handler() http.Handler {
 // - Name
 // - First Name
 // - Last Name
-// - Profile Picture
+// - Profile Picture.
 func (m *Messenger) ProfileByID(id int64, profileFields []string) (Profile, error) {
 	p := Profile{}
 	url := fmt.Sprintf("%v%v", ProfileURL, id)
@@ -204,7 +204,7 @@ func (m *Messenger) ProfileByID(id int64, profileFields []string) (Profile, erro
 	return p, err
 }
 
-// GreetingSetting sends settings for greeting
+// GreetingSetting sends settings for greeting.
 func (m *Messenger) GreetingSetting(text string) (QueryResponse, error) {
 	var qr QueryResponse
 
@@ -239,7 +239,7 @@ func (m *Messenger) GreetingSetting(text string) (QueryResponse, error) {
 	return getFacebookQueryResponse(resp.Body)
 }
 
-// CallToActionsSetting sends settings for Get Started or Persistent Menu
+// CallToActionsSetting sends settings for Get Started or Persistent Menu.
 func (m *Messenger) CallToActionsSetting(state string, actions []CallToActionsItem) (QueryResponse, error) {
 	var qr QueryResponse
 
@@ -296,7 +296,7 @@ func (m *Messenger) handle(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if rec.Object != "page" {
-		fmt.Println("Object is not page, undefined behaviour. Got", rec.Object)
+		fmt.Println("Object is not page, undefined behavior. Got", rec.Object)
 		respond(w, http.StatusUnprocessableEntity)
 		return
 	}
@@ -319,7 +319,7 @@ func respond(w http.ResponseWriter, code int) {
 	fmt.Fprintf(w, `{"code": %d, "status": "%s"}`, code, http.StatusText(code))
 }
 
-// checkIntegrity checks the integrity of the requests received
+// checkIntegrity checks the integrity of the requests received.
 func (m *Messenger) checkIntegrity(r *http.Request) error {
 	if m.appSecret == "" {
 		return xerrors.New("missing app secret")
@@ -424,7 +424,7 @@ func (m *Messenger) dispatch(r Receive) {
 	}
 }
 
-// Response returns new Response object
+// Response returns new Response object.
 func (m *Messenger) Response(to int64) *Response {
 	return &Response{
 		to:    Recipient{to},
@@ -437,7 +437,7 @@ func (m *Messenger) Send(to Recipient, message string, messagingType MessagingTy
 	return m.SendWithReplies(to, message, nil, messagingType, metadata, tags...)
 }
 
-// SendGeneralMessage will send the GenericTemplate message
+// SendGeneralMessage will send the GenericTemplate message.
 func (m *Messenger) SendGeneralMessage(to Recipient, elements *[]StructuredMessageElement, messagingType MessagingType, metadata string, tags ...string) (QueryResponse, error) {
 	r := &Response{
 		token: m.token,
@@ -515,7 +515,7 @@ func (m *Messenger) classify(info MessageInfo) Action {
 	return UnknownAction
 }
 
-// newVerifyHandler returns a function which can be used to handle webhook verification
+// newVerifyHandler returns a function which can be used to handle webhook verification.
 func newVerifyHandler(token string) func(w http.ResponseWriter, r *http.Request) {
 	return func(w http.ResponseWriter, r *http.Request) {
 		if r.FormValue("hub.verify_token") == token {
diff --git a/profile.go b/profile.go
index de3bbbc..52e909c 100644
--- a/profile.go
+++ b/profile.go
@@ -1,6 +1,6 @@
 package messenger
 
-// Profile is the public information of a Facebook user
+// Profile is the public information of a Facebook user.
 type Profile struct {
 	Name          string  `json:"name"`
 	FirstName     string  `json:"first_name"`
diff --git a/receiving.go b/receiving.go
index d7bd3d7..f83d099 100644
--- a/receiving.go
+++ b/receiving.go
@@ -58,7 +58,7 @@ type OptIn struct {
 	Ref string `json:"ref"`
 }
 
-// ReferralMessage represents referral endpoint
+// ReferralMessage represents referral endpoint.
 type ReferralMessage struct {
 	*Referral
 
@@ -70,7 +70,7 @@ type ReferralMessage struct {
 	Time time.Time `json:"-"`
 }
 
-// Referral represents referral info
+// Referral represents referral info.
 type Referral struct {
 	// Data originally passed in the ref param
 	Ref string `json:"ref"`
@@ -112,13 +112,13 @@ type QuickReply struct {
 
 // Payload is the information on where an attachment is.
 type Payload struct {
-	URL string `json:"url,omitempty"`
+	URL   string `json:"url,omitempty"`
 	Title string `json:"title,omitempty"`
 	// Coordinates is Lat/Long pair of location pin
 	Coordinates *Coordinates `json:"coordinates,omitempty"`
 }
 
-// Coordinates is a pair of latitude and longitude
+// Coordinates is a pair of latitude and longitude.
 type Coordinates struct {
 	// Lat is latitude
 	Lat float64 `json:"lat"`
diff --git a/response.go b/response.go
index 2a874d5..2ae1a40 100644
--- a/response.go
+++ b/response.go
@@ -39,13 +39,13 @@ const (
 	// FileAttachment is file attachment type.
 	FileAttachment AttachmentType = "file"
 
-	// ResponseType is response messaging type
+	// ResponseType is response messaging type.
 	ResponseType MessagingType = "RESPONSE"
-	// UpdateType is update messaging type
+	// UpdateType is update messaging type.
 	UpdateType MessagingType = "UPDATE"
-	// MessageTagType is message_tag messaging type
+	// MessageTagType is message_tag messaging type.
 	MessageTagType MessagingType = "MESSAGE_TAG"
-	// NonPromotionalSubscriptionType is NON_PROMOTIONAL_SUBSCRIPTION messaging type
+	// NonPromotionalSubscriptionType is NON_PROMOTIONAL_SUBSCRIPTION messaging type.
 	NonPromotionalSubscriptionType MessagingType = "NON_PROMOTIONAL_SUBSCRIPTION"
 
 	// TopElementStyle is compact.
@@ -60,14 +60,14 @@ const (
 )
 
 // QueryResponse is the response sent back by Facebook when setting up things
-// like greetings or call-to-actions
+// like greetings or call-to-actions.
 type QueryResponse struct {
 	Error       *QueryError `json:"error,omitempty"`
 	RecipientID string      `json:"recipient_id"`
 	MessageID   string      `json:"message_id"`
 }
 
-// QueryError is representing an error sent back by Facebook
+// QueryError is representing an error sent back by Facebook.
 type QueryError struct {
 	Message      string `json:"message"`
 	Type         string `json:"type"`
@@ -76,7 +76,7 @@ type QueryError struct {
 	FBTraceID    string `json:"fbtrace_id"`
 }
 
-// QueryError implements error
+// QueryError implements error.
 func (e QueryError) Error() string {
 	return e.Message
 }
@@ -126,7 +126,8 @@ func (r *Response) Text(message string, messagingType MessagingType, metadata st
 
 // TextWithReplies sends a textual message with some replies
 // messagingType should be one of the following: "RESPONSE","UPDATE","MESSAGE_TAG","NON_PROMOTIONAL_SUBSCRIPTION"
-// only supply tags when messagingType == "MESSAGE_TAG" (see https://developers.facebook.com/docs/messenger-platform/send-messages#messaging_types for more)
+// only supply tags when messagingType == "MESSAGE_TAG"
+// (see https://developers.facebook.com/docs/messenger-platform/send-messages#messaging_types for more).
 func (r *Response) TextWithReplies(message string, replies []QuickReply, messagingType MessagingType, metadata string, tags ...string) (QueryResponse, error) {
 	var tag string
 	if len(tags) > 0 {
@@ -147,7 +148,7 @@ func (r *Response) TextWithReplies(message string, replies []QuickReply, messagi
 	return r.DispatchMessage(&m)
 }
 
-// AttachmentWithReplies sends a attachment message with some replies
+// AttachmentWithReplies sends a attachment message with some replies.
 func (r *Response) AttachmentWithReplies(attachment *StructuredMessageAttachment, replies []QuickReply, messagingType MessagingType, metadata string, tags ...string) (QueryResponse, error) {
 	var tag string
 	if len(tags) > 0 {
@@ -204,15 +205,15 @@ func (r *Response) Attachment(dataType AttachmentType, url string, messagingType
 	return r.DispatchMessage(&m)
 }
 
-// copied from multipart package
+// copied from multipart package.
 var quoteEscaper = strings.NewReplacer("\\", "\\\\", `"`, "\\\"")
 
-// copied from multipart package
+// copied from multipart package.
 func escapeQuotes(s string) string {
 	return quoteEscaper.Replace(s)
 }
 
-// copied from multipart package with slight changes due to fixed content-type there
+// copied from multipart package with slight changes due to fixed content-type there.
 func createFormFile(filename string, w *multipart.Writer, contentType string) (io.Writer, error) {
 	h := make(textproto.MIMEHeader)
 	h.Set("Content-Disposition",
@@ -267,7 +268,7 @@ func (r *Response) AttachmentData(dataType AttachmentType, filename string, file
 	return getFacebookQueryResponse(resp.Body)
 }
 
-// ButtonTemplate sends a message with the main contents being button elements
+// ButtonTemplate sends a message with the main contents being button elements.
 func (r *Response) ButtonTemplate(text string, buttons *[]StructuredMessageButton, messagingType MessagingType, metadata string, tags ...string) (QueryResponse, error) {
 	var tag string
 	if len(tags) > 0 {
@@ -295,7 +296,7 @@ func (r *Response) ButtonTemplate(text string, buttons *[]StructuredMessageButto
 	return r.DispatchMessage(&m)
 }
 
-// GenericTemplate is a message which allows for structural elements to be sent
+// GenericTemplate is a message which allows for structural elements to be sent.
 func (r *Response) GenericTemplate(elements *[]StructuredMessageElement, messagingType MessagingType, metadata string, tags ...string) (QueryResponse, error) {
 	var tag string
 	if len(tags) > 0 {
@@ -321,7 +322,7 @@ func (r *Response) GenericTemplate(elements *[]StructuredMessageElement, messagi
 	return r.DispatchMessage(&m)
 }
 
-// ListTemplate sends a list of elements
+// ListTemplate sends a list of elements.
 func (r *Response) ListTemplate(elements *[]StructuredMessageElement, messagingType MessagingType, tags ...string) (QueryResponse, error) {
 	var tag string
 	if len(tags) > 0 {
@@ -347,7 +348,7 @@ func (r *Response) ListTemplate(elements *[]StructuredMessageElement, messagingT
 	return r.DispatchMessage(&m)
 }
 
-// SenderAction sends a info about sender action
+// SenderAction sends a info about sender action.
 func (r *Response) SenderAction(action string) (QueryResponse, error) {
 	m := SendSenderAction{
 		Recipient:    r.to,
@@ -356,7 +357,7 @@ func (r *Response) SenderAction(action string) (QueryResponse, error) {
 	return r.DispatchMessage(&m)
 }
 
-// DispatchMessage posts the message to messenger, return the error if there's any
+// DispatchMessage posts the message to messenger, return the error if there's any.
 func (r *Response) DispatchMessage(m interface{}) (QueryResponse, error) {
 	var res QueryResponse
 	data, err := json.Marshal(m)
@@ -453,7 +454,7 @@ type StructuredMessageAttachment struct {
 	Payload StructuredMessagePayload `json:"payload"`
 }
 
-// StructuredMessagePayload is the actual payload of an attachment
+// StructuredMessagePayload is the actual payload of an attachment.
 type StructuredMessagePayload struct {
 	// TemplateType must be button, generic or receipt
 	TemplateType     string                      `json:"template_type,omitempty"`
@@ -500,14 +501,14 @@ type Adjustment struct {
 	Amount float32 `json:"amount,omitempty"`
 }
 
-// StructuredMessageElement is a response containing structural elements
+// StructuredMessageElement is a response containing structural elements.
 type StructuredMessageElement struct {
-	Title         string                    `json:"title"`
-	ImageURL      string                    `json:"image_url"`
-	ItemURL       string                    `json:"item_url,omitempty"`
-	Subtitle      string                    `json:"subtitle"`
-	DefaultAction *DefaultAction            `json:"default_action,omitempty"`
-	Buttons       []StructuredMessageButton `json:"buttons"`
+	Title         string                     `json:"title"`
+	ImageURL      string                     `json:"image_url"`
+	ItemURL       string                     `json:"item_url,omitempty"`
+	Subtitle      string                     `json:"subtitle"`
+	DefaultAction *DefaultAction             `json:"default_action,omitempty"`
+	Buttons       *[]StructuredMessageButton `json:"buttons"`
 	ReceiptMessageElement
 }
 
@@ -517,7 +518,7 @@ type ReceiptMessageElement struct {
 	Currency string  `json:"currency,omitempty"`
 }
 
-// DefaultAction is a response containing default action properties
+// DefaultAction is a response containing default action properties.
 type DefaultAction struct {
 	Type                string `json:"type"`
 	URL                 string `json:"url,omitempty"`
@@ -527,7 +528,7 @@ type DefaultAction struct {
 	WebviewShareButton  string `json:"webview_share_button,omitempty"`
 }
 
-// StructuredMessageButton is a response containing buttons
+// StructuredMessageButton is a response containing buttons.
 type StructuredMessageButton struct {
 	Type                string                 `json:"type"`
 	URL                 string                 `json:"url,omitempty"`
@@ -540,7 +541,7 @@ type StructuredMessageButton struct {
 	ShareContents       *StructuredMessageData `json:"share_contents,omitempty"`
 }
 
-// SendSenderAction is the information about sender action
+// SendSenderAction is the information about sender action.
 type SendSenderAction struct {
 	Recipient    Recipient `json:"recipient"`
 	SenderAction string    `json:"sender_action"`
diff --git a/settings.go b/settings.go
index 43ac9c5..5e1a809 100644
--- a/settings.go
+++ b/settings.go
@@ -17,25 +17,25 @@ const (
 	WebviewFull = "full"
 )
 
-// GreetingSetting is the setting for greeting message
+// GreetingSetting is the setting for greeting message.
 type GreetingSetting struct {
 	SettingType string       `json:"setting_type"`
 	Greeting    GreetingInfo `json:"greeting"`
 }
 
-// GreetingInfo contains greeting message
+// GreetingInfo contains greeting message.
 type GreetingInfo struct {
 	Text string `json:"text"`
 }
 
-// CallToActionsSetting is the settings for Get Started and Persist Menu
+// CallToActionsSetting is the settings for Get Started and Persist Menu.
 type CallToActionsSetting struct {
 	SettingType   string              `json:"setting_type"`
 	ThreadState   string              `json:"thread_state"`
 	CallToActions []CallToActionsItem `json:"call_to_actions"`
 }
 
-// CallToActionsItem contains Get Started button or item of Persist Menu
+// CallToActionsItem contains Get Started button or item of Persist Menu.
 type CallToActionsItem struct {
 	Type               string `json:"type,omitempty"`
 	Title              string `json:"title,omitempty"`