diff --git a/CHANGELOG.md b/CHANGELOG.md
index fce4273..14617a6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 All notable changes will be documented in this file.
 
+## [1.0.3] - 2023-01-16
+
+* Add localization support for update message.
+
+## [1.0.1] - 2023-01-12
+
+* Update dependecies.
+
 ## [1.0.0] - 2023-01-10
 
 * Hello World!.
\ No newline at end of file
diff --git a/README.md b/README.md
index 19cad92..9ff5822 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@ allprojects {
 2. Add the dependency to your project
 ```groovy
 dependencies {
-  implementation 'com.github.appupgrade-dev:app-upgrade-android-sdk:1.0.0'
+  implementation 'com.github.appupgrade-dev:app-upgrade-android-sdk:1.0.2'
 }
 ```
 
@@ -61,6 +61,7 @@ val appInfo = AppInfo(
     appVersion = "1.0.0",
     platform = "android",
     environment = "production"
+    appLanguage = "es" // Optional, used for localizing the update message.
 )
 
 //Optional
@@ -83,6 +84,7 @@ appUpgrade.checkForUpdates(this, xApiKey, appInfo, alertDialogConfig)
         String appVersion = "1.0.0";
         String platform = "android";
         String environment = "production";
+        String appLanguage = "es"
 
         AppInfo appInfo = new AppInfo(appId, appName, appVersion, platform, environment);
 
diff --git a/app-upgrade-android-sdk/src/main/java/com/appupgrade/app_upgrade_android_sdk/AppUpgradeRepository.kt b/app-upgrade-android-sdk/src/main/java/com/appupgrade/app_upgrade_android_sdk/AppUpgradeRepository.kt
index 48a8059..4dcce38 100644
--- a/app-upgrade-android-sdk/src/main/java/com/appupgrade/app_upgrade_android_sdk/AppUpgradeRepository.kt
+++ b/app-upgrade-android-sdk/src/main/java/com/appupgrade/app_upgrade_android_sdk/AppUpgradeRepository.kt
@@ -37,6 +37,10 @@
                 params["platform"] = appInfo.platform
                 params["environment"] = appInfo.environment
 
+                if (!appInfo.appLanguage.isNullOrEmpty()) {
+                    params["app_language"] = appInfo.appLanguage
+                }
+
                 val call = appUpgradeApi.versionCheck(xApiKey, params)
 
                 call.enqueue(object : Callback<AppUpgradeResponse> {
diff --git a/app-upgrade-android-sdk/src/main/java/com/appupgrade/app_upgrade_android_sdk/models/AlertDialogConfig.kt b/app-upgrade-android-sdk/src/main/java/com/appupgrade/app_upgrade_android_sdk/models/AlertDialogConfig.kt
index 85f00ed..a37b3b9 100644
--- a/app-upgrade-android-sdk/src/main/java/com/appupgrade/app_upgrade_android_sdk/models/AlertDialogConfig.kt
+++ b/app-upgrade-android-sdk/src/main/java/com/appupgrade/app_upgrade_android_sdk/models/AlertDialogConfig.kt
@@ -1,7 +1,7 @@
 package com.appupgrade.app_upgrade_android_sdk.models
 
 data class AlertDialogConfig(
-    val title: String?,
-    val updateButtonTitle: String?,
-    val laterButtonTitle: String?,
+    val title: String? = null,
+    val updateButtonTitle: String? = null,
+    val laterButtonTitle: String? = null,
 )
diff --git a/app-upgrade-android-sdk/src/main/java/com/appupgrade/app_upgrade_android_sdk/models/AppInfo.kt b/app-upgrade-android-sdk/src/main/java/com/appupgrade/app_upgrade_android_sdk/models/AppInfo.kt
index 5893df1..4fe0a1d 100644
--- a/app-upgrade-android-sdk/src/main/java/com/appupgrade/app_upgrade_android_sdk/models/AppInfo.kt
+++ b/app-upgrade-android-sdk/src/main/java/com/appupgrade/app_upgrade_android_sdk/models/AppInfo.kt
@@ -6,4 +6,5 @@ data class AppInfo(
     val appVersion: String,
     val platform: String,
     val environment: String,
+    val appLanguage: String? = null,
 )
diff --git a/app/src/main/java/com/appupgrade/app_upgrade_android_sdk/MainActivity.kt b/app/src/main/java/com/appupgrade/app_upgrade_android_sdk/MainActivity.kt
index dbe3190..da64eee 100644
--- a/app/src/main/java/com/appupgrade/app_upgrade_android_sdk/MainActivity.kt
+++ b/app/src/main/java/com/appupgrade/app_upgrade_android_sdk/MainActivity.kt
@@ -2,6 +2,7 @@ package com.appupgrade.app_upgrade_android_sdk
 
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import com.appupgrade.app_upgrade_android_sdk.models.AlertDialogConfig
 import com.appupgrade.app_upgrade_android_sdk.models.AppInfo
 
 class MainActivity : AppCompatActivity() {
@@ -17,6 +18,7 @@ class MainActivity : AppCompatActivity() {
             appVersion = "1.0.0",
             platform = "android",
             environment = "production",
+            appLanguage = "en"
         )
 
         AppUpgrade().checkForUpdates(this, xApiKey, appInfo);