diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/buttons/InlineKeyboardButtons/InlineKeyboardButton.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/buttons/InlineKeyboardButtons/InlineKeyboardButton.kt
index 85f65a2b13..a3f95bce73 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/buttons/InlineKeyboardButtons/InlineKeyboardButton.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/buttons/InlineKeyboardButtons/InlineKeyboardButton.kt
@@ -2,6 +2,7 @@ package dev.inmo.tgbotapi.types.buttons.InlineKeyboardButtons
 
 import dev.inmo.tgbotapi.types.*
 import dev.inmo.tgbotapi.types.games.CallbackGame
+import dev.inmo.tgbotapi.types.webapps.WebAppInfo
 import kotlinx.serialization.*
 import kotlinx.serialization.json.*
 
@@ -120,3 +121,14 @@ data class URLInlineKeyboardButton(
     @SerialName(urlField)
     val url: String
 ) : InlineKeyboardButton
+
+/**
+ * Button with [WebAppInfo]. Web App will be launched when the button is pressed. The Web App will be able to send a
+ * `web_app_data` service message. **Available in private chats only**.
+ */
+@Serializable
+data class WebAppInlineKeyboardButton(
+    override val text: String,
+    @SerialName(webAppField)
+    val webApp: WebAppInfo
+) : InlineKeyboardButton
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/buttons/InlineKeyboardButtons/InlineKeyboardButtonSerializer.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/buttons/InlineKeyboardButtons/InlineKeyboardButtonSerializer.kt
index 1beef89dd8..70005d12c7 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/buttons/InlineKeyboardButtons/InlineKeyboardButtonSerializer.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/buttons/InlineKeyboardButtons/InlineKeyboardButtonSerializer.kt
@@ -48,6 +48,7 @@ object InlineKeyboardButtonSerializer : KSerializer<InlineKeyboardButton> {
             is SwitchInlineQueryInlineKeyboardButton -> SwitchInlineQueryInlineKeyboardButton.serializer().serialize(encoder, value)
             is SwitchInlineQueryCurrentChatInlineKeyboardButton -> SwitchInlineQueryCurrentChatInlineKeyboardButton.serializer().serialize(encoder, value)
             is URLInlineKeyboardButton -> URLInlineKeyboardButton.serializer().serialize(encoder, value)
+            is WebAppInlineKeyboardButton -> WebAppInlineKeyboardButton.serializer().serialize(encoder, value)
             is CallbackGameInlineKeyboardButton -> CallbackGameInlineKeyboardButton.serializer().serialize(encoder, value)
             is UnknownInlineKeyboardButton -> JsonElement.serializer().serialize(encoder, value.rawData)
         }
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/buttons/KeyboardButton.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/buttons/KeyboardButton.kt
index 688dd3da03..4226bc94d2 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/buttons/KeyboardButton.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/buttons/KeyboardButton.kt
@@ -1,6 +1,7 @@
 package dev.inmo.tgbotapi.types.buttons
 
 import dev.inmo.tgbotapi.types.*
+import dev.inmo.tgbotapi.types.webapps.WebAppInfo
 import dev.inmo.tgbotapi.utils.RiskFeature
 import dev.inmo.tgbotapi.utils.nonstrictJsonFormat
 import kotlinx.serialization.*
@@ -63,10 +64,22 @@ data class RequestLocationKeyboardButton(
     override val text: String
 ) : KeyboardButton {
     @SerialName(requestLocationField)
-    @EncodeDefault
+    @Required
     val requestLocation: Boolean = true
 }
 
+/**
+ * Private chats only. Description of the Web App that will be launched when the user presses the button. The Web App
+ * will be able to send an arbitrary message on behalf of the user using the method `answerWebAppQuery`. Available only
+ * in private chats between a user and the bot.
+ */
+@Serializable
+data class WebAppKeyboardButton(
+    override val text: String,
+    @SerialName(webAppField)
+    val webApp: WebAppInfo
+) : KeyboardButton
+
 /**
  * Private chats only. When user will tap on this button, he will be asked for the poll with [requestPoll] options. You will be able
  * to catch this poll in updates and data using [dev.inmo.tgbotapi.extensions.behaviour_builder.triggers_handling.onPoll] in
@@ -97,6 +110,13 @@ object KeyboardButtonSerializer : KSerializer<KeyboardButton> {
             asJson is JsonObject && asJson[requestLocationField] != null -> RequestLocationKeyboardButton(
                 asJson[textField]!!.jsonPrimitive.content
             )
+            asJson is JsonObject && asJson[webAppField] != null -> WebAppKeyboardButton(
+                asJson[textField]!!.jsonPrimitive.content,
+                nonstrictJsonFormat.decodeFromJsonElement(
+                    WebAppInfo.serializer(),
+                    asJson[webAppField]!!
+                )
+            )
             asJson is JsonObject && asJson[requestPollField] != null -> RequestPollKeyboardButton(
                 asJson[textField]!!.jsonPrimitive.content,
                 nonstrictJsonFormat.decodeFromJsonElement(
@@ -119,6 +139,7 @@ object KeyboardButtonSerializer : KSerializer<KeyboardButton> {
         when (value) {
             is RequestContactKeyboardButton -> RequestContactKeyboardButton.serializer().serialize(encoder, value)
             is RequestLocationKeyboardButton -> RequestLocationKeyboardButton.serializer().serialize(encoder, value)
+            is WebAppKeyboardButton -> WebAppKeyboardButton.serializer().serialize(encoder, value)
             is RequestPollKeyboardButton -> RequestPollKeyboardButton.serializer().serialize(encoder, value)
             is SimpleKeyboardButton -> encoder.encodeString(value.text)
             is UnknownKeyboardButton -> JsonElement.serializer().serialize(encoder, nonstrictJsonFormat.parseToJsonElement(value.raw))
diff --git a/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt b/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt
index 071effbcbb..ed84b41075 100644
--- a/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt
+++ b/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt
@@ -2514,6 +2514,16 @@ inline fun InlineKeyboardButton.asURLInlineKeyboardButton(): URLInlineKeyboardBu
 inline fun InlineKeyboardButton.requireURLInlineKeyboardButton(): URLInlineKeyboardButton =
     this as URLInlineKeyboardButton
 
+@PreviewFeature
+inline fun <T> InlineKeyboardButton.whenWebAppKeyboardButton(block: (WebAppKeyboardButton) -> T) = asWebAppKeyboardButton() ?.let(block)
+
+@PreviewFeature
+inline fun InlineKeyboardButton.asWebAppKeyboardButton(): WebAppKeyboardButton? = this as? WebAppKeyboardButton
+
+@PreviewFeature
+inline fun InlineKeyboardButton.requireWebAppKeyboardButton(): WebAppKeyboardButton =
+    this as WebAppKeyboardButton
+
 @PreviewFeature
 inline fun <T> InlineKeyboardButton.whenUnknownInlineKeyboardButton(block: (UnknownInlineKeyboardButton) -> T) = asUnknownInlineKeyboardButton() ?.let(block)
 
diff --git a/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/types/buttons/InlineKeyboardBuilder.kt b/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/types/buttons/InlineKeyboardBuilder.kt
index 1d348269b8..d34fc9a936 100644
--- a/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/types/buttons/InlineKeyboardBuilder.kt
+++ b/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/types/buttons/InlineKeyboardBuilder.kt
@@ -3,6 +3,7 @@ package dev.inmo.tgbotapi.extensions.utils.types.buttons
 import dev.inmo.tgbotapi.types.LoginURL
 import dev.inmo.tgbotapi.types.buttons.InlineKeyboardButtons.*
 import dev.inmo.tgbotapi.types.buttons.InlineKeyboardMarkup
+import dev.inmo.tgbotapi.types.webapps.WebAppInfo
 import dev.inmo.tgbotapi.utils.MatrixBuilder
 import dev.inmo.tgbotapi.utils.RowBuilder
 
@@ -128,3 +129,14 @@ inline fun InlineKeyboardRowBuilder.urlButton(
     text: String,
     url: String
 ) = add(URLInlineKeyboardButton(text, url))
+
+/**
+ * Creates and put [WebAppInlineKeyboardButton]. Please, remember that this button is available in private chats only
+ *
+ * @see inlineKeyboard
+ * @see InlineKeyboardBuilder.row
+ */
+inline fun InlineKeyboardRowBuilder.webAppButton(
+    text: String,
+    webApp: WebAppInfo
+) = add(WebAppInlineKeyboardButton(text, webApp))
diff --git a/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/types/buttons/ReplyKeyboardBuilder.kt b/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/types/buttons/ReplyKeyboardBuilder.kt
index ea36d5cfc4..78e86fb8d8 100644
--- a/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/types/buttons/ReplyKeyboardBuilder.kt
+++ b/tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/types/buttons/ReplyKeyboardBuilder.kt
@@ -1,6 +1,7 @@
 package dev.inmo.tgbotapi.extensions.utils.types.buttons
 
 import dev.inmo.tgbotapi.types.buttons.*
+import dev.inmo.tgbotapi.types.webapps.WebAppInfo
 import dev.inmo.tgbotapi.utils.MatrixBuilder
 import dev.inmo.tgbotapi.utils.RowBuilder
 
@@ -98,3 +99,14 @@ inline fun ReplyKeyboardRowBuilder.requestPollButton(
     text: String,
     pollType: KeyboardButtonPollType
 ) = add(RequestPollKeyboardButton(text, pollType))
+
+/**
+ * Creates and put [WebAppKeyboardButton]
+ *
+ * @see replyKeyboard
+ * @see ReplyKeyboardBuilder.row
+ */
+inline fun ReplyKeyboardRowBuilder.webAppButton(
+    text: String,
+    webApp: WebAppInfo
+) = add(WebAppKeyboardButton(text, webApp))