diff --git a/app/build.gradle b/app/build.gradle
index 653f6280..64b2f61a 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -16,8 +16,8 @@ android {
         applicationId "com.starry.greenstash"
         minSdk 24
         targetSdk 34
-        versionCode 27
-        versionName "2.7.0"
+        versionCode 28
+        versionName "2.8.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {
@@ -82,7 +82,7 @@ dependencies {
     // Android core components.
     implementation 'androidx.core:core-ktx:1.12.0'
     implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.6.2'
-    implementation 'androidx.activity:activity-compose:1.7.2'
+    implementation 'androidx.activity:activity-compose:1.8.0'
     implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.6.2"
     implementation "androidx.lifecycle:lifecycle-viewmodel-compose:2.6.2"
     // Jetpack compose.
@@ -96,7 +96,7 @@ dependencies {
     implementation "com.google.accompanist:accompanist-systemuicontroller:0.28.0"
     implementation "com.google.accompanist:accompanist-navigation-animation:0.33.1-alpha"
     // Material theme for main activity.
-    implementation 'com.google.android.material:material:1.9.0'
+    implementation 'com.google.android.material:material:1.10.0'
     // Android 12+ splash API.
     implementation 'androidx.core:core-splashscreen:1.0.1'
     // Room database
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 481bb434..4d58af0f 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -18,4 +18,22 @@
 
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
-#-renamesourcefileattribute SourceFile
\ No newline at end of file
+#-renamesourcefileattribute SourceFile
+
+# Keep all data classes.
+#
+# Rule explanation:
+# 1. All data class has component1() method which returns data
+# 2. All data class has at least one field.
+# 3. Almost all the classes doesn’t satisfy criteria above.
+-keepclasseswithmembers class com.starry.greenstash.** {
+    public ** component1();
+    <fields>;
+}
+
+# Prevent proguard from stripping interface information from TypeAdapter, TypeAdapterFactory,
+# JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter)
+-keep class * implements com.google.gson.TypeAdapter
+-keep class * implements com.google.gson.TypeAdapterFactory
+-keep class * implements com.google.gson.JsonSerializer
+-keep class * implements com.google.gson.JsonDeserializer
\ No newline at end of file
diff --git a/app/src/main/java/com/starry/greenstash/backup/BackupManager.kt b/app/src/main/java/com/starry/greenstash/backup/BackupManager.kt
index d5d9009b..d2cc3a95 100644
--- a/app/src/main/java/com/starry/greenstash/backup/BackupManager.kt
+++ b/app/src/main/java/com/starry/greenstash/backup/BackupManager.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.graphics.Bitmap
 import android.util.Log
+import androidx.annotation.Keep
 import androidx.core.content.FileProvider
 import com.google.gson.Gson
 import com.google.gson.GsonBuilder
@@ -34,8 +35,10 @@ class BackupManager(private val context: Context, private val goalDao: GoalDao)
     companion object {
         /** Backup schema version. */
         const val BACKUP_SCHEMA_VERSION = 1
+
         /** Authority for using file provider API. */
         private const val FILE_PROVIDER_AUTHORITY = "${BuildConfig.APPLICATION_ID}.provider"
+
         /** An ISO-8601 date format for Gson */
         private const val ISO8601_DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
     }
@@ -44,6 +47,7 @@ class BackupManager(private val context: Context, private val goalDao: GoalDao)
      * Model for backup json data, containing current schema version
      * and timestamp when backup was created.
      */
+    @Keep
     data class BackupJsonModel(
         val version: Int = BACKUP_SCHEMA_VERSION,
         val timestamp: Long,
diff --git a/fastlane/metadata/android/en-US/changelogs/28.txt b/fastlane/metadata/android/en-US/changelogs/28.txt
new file mode 100644
index 00000000..37166117
--- /dev/null
+++ b/fastlane/metadata/android/en-US/changelogs/28.txt
@@ -0,0 +1,5 @@
+- Rewrote backup & restore backend from scratch to be more reliable & stable.
+- Fixed notes field going below the keyboard as the user types.
+- Added Chinese translation.
+- Updated dependencies, gradle & kotlin version.
+- Some other minor fixes & improvements.
\ No newline at end of file