diff --git a/src/api_params.rs b/src/api_params.rs
index 87b3223..e1224df 100644
--- a/src/api_params.rs
+++ b/src/api_params.rs
@@ -11,7 +11,7 @@ use crate::objects::{
     MenuButton, MessageEntity, PassportElementErrorDataField, PassportElementErrorFile,
     PassportElementErrorFiles, PassportElementErrorFrontSide, PassportElementErrorReverseSide,
     PassportElementErrorSelfie, PassportElementErrorTranslationFile,
-    PassportElementErrorTranslationFiles, PassportElementErrorUnspecified, PollType,
+    PassportElementErrorTranslationFiles, PassportElementErrorUnspecified, PollType, ReactionType,
     ReplyKeyboardMarkup, ReplyKeyboardRemove, ShippingOption, StickerFormat, StickerType,
     WebAppInfo,
 };
@@ -1135,6 +1135,20 @@ pub struct SendChatActionParams {
     pub action: ChatAction,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, Builder)]
+pub struct SetMessageReactionParams {
+    #[builder(setter(into))]
+    pub chat_id: ChatId,
+
+    pub message_id: i32,
+
+    pub reacion: Vec<ReactionType>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[builder(setter(into, strip_option), default)]
+    pub is_big: Option<bool>,
+}
+
 #[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq, Builder)]
 pub struct GetUserProfilePhotosParams {
     pub user_id: u64,
diff --git a/src/api_traits/telegram_api.rs b/src/api_traits/telegram_api.rs
index e29e837..c8a38d8 100644
--- a/src/api_traits/telegram_api.rs
+++ b/src/api_traits/telegram_api.rs
@@ -88,6 +88,7 @@ use crate::api_params::SetChatStickerSetParams;
 use crate::api_params::SetChatTitleParams;
 use crate::api_params::SetCustomEmojiStickerSetThumbnailParams;
 use crate::api_params::SetGameScoreParams;
+use crate::api_params::SetMessageReactionParams;
 use crate::api_params::SetMyCommandsParams;
 use crate::api_params::SetMyDefaultAdministratorRightsParams;
 use crate::api_params::SetMyDescriptionParams;
@@ -454,6 +455,13 @@ pub trait TelegramApi {
         self.request("sendChatAction", Some(params))
     }
 
+    fn set_message_reaction(
+        &self,
+        params: &SetMessageReactionParams,
+    ) -> Result<MethodResponse<bool>, Self::Error> {
+        self.request("setMessageReaction", Some(params))
+    }
+
     fn get_user_profile_photos(
         &self,
         params: &GetUserProfilePhotosParams,
diff --git a/src/objects.rs b/src/objects.rs
index dfdd6d7..fdfaae9 100644
--- a/src/objects.rs
+++ b/src/objects.rs
@@ -345,6 +345,8 @@ pub enum UpdateContent {
     EditedMessage(Message),
     ChannelPost(Message),
     EditedChannelPost(Message),
+    MessageReaction(MessageReactionUpdated),
+    MessageReactionCount(MessageReactionCountUpdated),
     InlineQuery(InlineQuery),
     ChosenInlineResult(ChosenInlineResult),
     CallbackQuery(CallbackQuery),
@@ -402,6 +404,8 @@ pub enum AllowedUpdate {
     EditedMessage,
     ChannelPost,
     EditedChannelPost,
+    MessageReaction,
+    MessageReactionCount,
     InlineQuery,
     ChosenInlineResult,
     CallbackQuery,
@@ -491,6 +495,10 @@ pub struct Chat {
     #[builder(setter(into, strip_option), default)]
     pub active_usernames: Option<Vec<String>>,
 
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[builder(setter(into, strip_option), default)]
+    pub available_reactions: Option<Vec<ReactionType>>,
+
     #[serde(skip_serializing_if = "Option::is_none")]
     #[builder(setter(into, strip_option), default)]
     pub emoji_status_custom_emoji_id: Option<String>,
@@ -1722,6 +1730,74 @@ pub struct ChatLocation {
     pub address: String,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(tag = "type", rename_all = "snake_case")]
+pub enum ReactionType {
+    Emoji(ReactionTypeEmoji),
+    CustomEmoji(ReactionTypeCustomEmoji),
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Builder, Eq)]
+pub struct ReactionTypeEmoji {
+    #[builder(setter(into))]
+    #[serde(rename = "type")]
+    pub type_field: String,
+
+    #[builder(setter(into))]
+    pub emoji: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Builder, Eq)]
+pub struct ReactionTypeCustomEmoji {
+    #[builder(setter(into))]
+    #[serde(rename = "type")]
+    pub type_field: String,
+
+    #[builder(setter(into))]
+    pub custom_emoji: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Builder)]
+pub struct ReactionCount {
+    #[builder(setter(into))]
+    #[serde(rename = "type")]
+    pub type_field: ReactionType,
+
+    pub total_count: i32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Builder)]
+pub struct MessageReactionUpdated {
+    pub chat: Chat,
+
+    pub message_id: i32,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[builder(setter(into, strip_option), default)]
+    pub user: Option<User>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[builder(setter(into, strip_option), default)]
+    pub actor_chat: Option<Chat>,
+
+    pub date: u64,
+
+    pub old_reaction: Vec<ReactionType>,
+
+    pub new_reaction: Vec<ReactionType>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Builder)]
+pub struct MessageReactionCountUpdated {
+    pub chat: Chat,
+
+    pub message_id: i32,
+
+    pub date: u64,
+
+    pub reactions: Vec<ReactionCount>,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq, Builder)]
 pub struct ForumTopic {
     pub message_thread_id: i32,