diff --git a/chat.go b/chat.go
index 2ed488b3..84dbd5c8 100644
--- a/chat.go
+++ b/chat.go
@@ -74,6 +74,7 @@ type Chat struct {
 	ProfileBackgroundEmojiID string               `json:"profile_background_custom_emoji_id"`
 	HasVisibleHistory        bool                 `json:"has_visible_history"`
 	UnrestrictBoosts         int                  `json:"unrestrict_boost_count"`
+	MaxReactionCount         int           `json:"max_reaction_count"`
 	Birthdate                Birthdate            `json:"birthdate,omitempty"`
 	PersonalChat             *Chat                `json:"personal_chat,omitempty"`
 	BusinessIntro            BusinessIntro        `json:"business_intro,omitempty"`
@@ -171,6 +172,11 @@ type ChatMemberUpdate struct {
 	// join the chat; for joining by invite link events only.
 	InviteLink *ChatInviteLink `json:"invite_link"`
 
+	// (Optional) True, if the user joined the chat after sending
+	//a direct join request without using an invite link and being
+	//approved by an administrator
+	ViaJoinRequest bool `json:"via_join_request"`
+
 	// (Optional) True, if the user joined the chat via a chat folder invite link.
 	ViaFolderLink bool `json:"via_chat_folder_invite_link"`
 }
@@ -267,6 +273,60 @@ type Story struct {
 	Poster *Chat `json:"chat"`
 }
 
+type BackgroundFill struct {
+	// Type of the background fill, always “solid”
+	Type string `json:"type"`
+
+	// The color of the background fill in the RGB24 format
+	Color int `json:"color,omitempty"`
+
+	// Top color of the gradient in the RGB24 format
+	TopColor int `json:"top_color,omitempty"`
+
+	// Bottom color of the gradient in the RGB24 format
+	BottomColor int `json:"bottom_color,omitempty"`
+
+	// Clockwise rotation angle of the background fill in degrees; 0-359
+	RotationAngle int `json:"rotation_angle,omitempty"`
+
+	// A list of the 3 or 4 base colors that are used to generate
+	// the freeform gradient in the RGB24 format
+	Colors []int `json:"colors,omitempty"`
+}
+
+type BackgroundType struct {
+	// Type of the background, always “fill”
+	Type string `json:"type"`
+
+	// The background fill
+	Fill BackgroundFill `json:"fill,omitempty"`
+
+	// Document with the wallpaper
+	Document Document `json:"document,omitempty"`
+
+	// Dimming of the background in dark themes, as a percentage; 0-100
+	DarkThemeDimming int `json:"dark_theme_dimming,omitempty"`
+
+	// Intensity of the pattern when it is shown above the filled background; 0-100
+	Intensity int `json:"intensity,omitempty"`
+
+	// (Optional) True, if the wallpaper is downscaled to fit in a 450x450
+	// square and then box-blurred with radius 12
+	IsBlurred bool `json:"is_blurred,omitempty"`
+
+	// (Optional) True, if the background moves slightly when the device is tilted
+	IsMoving bool `json:"is_moving,omitempty"`
+
+	// (Optional) True, if the background fill must be applied only to the pattern itself.
+	// All other pixels are black in this case. For dark themes only
+	IsInverted bool `json:"is_inverted,omitempty"`
+}
+
+type ChatBackground struct {
+	// Type of the background
+	Type BackgroundType `json:"type"`
+}
+
 type Birthdate struct {
 	// Day of the user's birth; 1-31
 	Day int `json:"day"`
diff --git a/media.go b/media.go
index bdce5557..2af63deb 100644
--- a/media.go
+++ b/media.go
@@ -2,8 +2,12 @@ package telebot
 
 import (
 	"encoding/json"
+	"math"
 )
 
+// Alias for math.MaxInt32
+const LiveForever = math.MaxInt32
+
 // Media is a generic type for all kinds of media that includes File.
 type Media interface {
 	// MediaType returns string-represented media type.
diff --git a/message.go b/message.go
index 7ede6724..f8a848a3 100644
--- a/message.go
+++ b/message.go
@@ -313,6 +313,9 @@ type Message struct {
 	// Service message: user boosted the chat.
 	BoostAdded *BoostAdded `json:"boost_added"`
 
+	// Service message: chat background set
+	ChatBackgroundSet ChatBackground `json:"chat_background_set"`
+
 	// If the sender of the message boosted the chat, the number of boosts
 	// added by the user.
 	SenderBoostCount int `json:"sender_boost_count"`
diff --git a/poll.go b/poll.go
index 48018e7b..196d562d 100644
--- a/poll.go
+++ b/poll.go
@@ -24,12 +24,14 @@ type Poll struct {
 	VoterCount int          `json:"total_voter_count"`
 
 	// (Optional)
-	Closed          bool            `json:"is_closed,omitempty"`
-	CorrectOption   int             `json:"correct_option_id,omitempty"`
-	MultipleAnswers bool            `json:"allows_multiple_answers,omitempty"`
-	Explanation     string          `json:"explanation,omitempty"`
-	ParseMode       ParseMode       `json:"explanation_parse_mode,omitempty"`
-	Entities        []MessageEntity `json:"explanation_entities"`
+	Closed            bool            `json:"is_closed,omitempty"`
+	CorrectOption     int             `json:"correct_option_id,omitempty"`
+	MultipleAnswers   bool            `json:"allows_multiple_answers,omitempty"`
+	Explanation       string          `json:"explanation,omitempty"`
+	ParseMode         ParseMode       `json:"explanation_parse_mode,omitempty"`
+	Entities          []MessageEntity `json:"explanation_entities"`
+	QuestionEntities  []MessageEntity `json:"question_entities"`
+	QuestionParseMode string          `json:"question_parse_mode"`
 
 	// True by default, shouldn't be omitted.
 	Anonymous bool `json:"is_anonymous"`
@@ -43,6 +45,10 @@ type Poll struct {
 type PollOption struct {
 	Text       string `json:"text"`
 	VoterCount int    `json:"voter_count"`
+
+	// (Optional) A JSON-serialized list of special entities that appear
+	//in the poll option text. It can be specified instead of text_parse_mode
+	TextEntities []MessageEntity `json:"text_entities"`
 }
 
 // PollAnswer represents an answer of a user in a non-anonymous poll.