diff --git a/README.md b/README.md
index b4832c7..91dc42f 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Please add your own API key into `local.properties` after cloning this app.
 You can get Gemini API key [here](https://ai.google.dev/).  
 
 ```
-API_KEY=[your api key]
+apiKey=[your api key]
 ```
 ### Screenshots
 
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index e8c0e6c..056131a 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -14,31 +14,23 @@ android {
         applicationId = "levi.lin.gemini.android"
         minSdk = 30
         targetSdk = 34
-        versionCode = 8
-        versionName = "0.1.1"
+        versionCode = 9
+        versionName = "0.2.0"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {
             useSupportLibrary = true
         }
-
-        val properties = Properties()
-        if (project.rootProject.file("local.properties").canRead()) {
-            properties.load(project.rootProject.file("local.properties").inputStream())
-
-        }
-
-        buildConfigField("String", "apiKey", "\"${properties.getProperty("API_KEY")}\"")
     }
 
     buildTypes {
         release {
             isMinifyEnabled = false
             proguardFiles(
-                getDefaultProguardFile("proguard-android-optimize.txt"),
+                getDefaultProguardFile(name = "proguard-android-optimize.txt"),
                 "proguard-rules.pro"
             )
-            signingConfig = signingConfigs.getByName("debug")
+            signingConfig = signingConfigs.getByName(name = "debug")
         }
     }
     compileOptions {
@@ -53,7 +45,7 @@ android {
         buildConfig = true
     }
     composeOptions {
-        kotlinCompilerExtensionVersion = "1.5.1"
+        kotlinCompilerExtensionVersion = "1.5.8"
     }
     packaging {
         resources {
diff --git a/app/src/main/java/levi/lin/gemini/android/viewmodel/GeminiViewModel.kt b/app/src/main/java/levi/lin/gemini/android/viewmodel/GeminiViewModel.kt
index cb9e8c0..a01b6a9 100644
--- a/app/src/main/java/levi/lin/gemini/android/viewmodel/GeminiViewModel.kt
+++ b/app/src/main/java/levi/lin/gemini/android/viewmodel/GeminiViewModel.kt
@@ -28,7 +28,7 @@ class GeminiViewModel(
     private val _selectedImageBitmaps = MutableStateFlow<List<Bitmap>>(emptyList())
     val selectedImageBitmaps: StateFlow<List<Bitmap>> = _selectedImageBitmaps.asStateFlow()
 
-    private val _selectedImageCount = MutableStateFlow(0)
+    private val _selectedImageCount = MutableStateFlow(value = 0)
     val selectedImageCount: StateFlow<Int> = _selectedImageCount.asStateFlow()
 
     private val _generativeModelFlow = MutableSharedFlow<GenerativeModel>()
@@ -38,22 +38,16 @@ class GeminiViewModel(
         _uiState.value = GeminiUiState.Loading
 
         val deviceLanguage = Locale.getDefault().displayLanguage
-        val textPrompt =
-            "Content:($inputText) \\n You are a lovely assistant. According to the provided content, "
-        val imagePrompt =
-            "Content:($inputText) \\n You are a lovely assistant. According to the provided images and content, "
-        val generalPrompt =
-            "if the content is a question, answer the question in $deviceLanguage. If the content is a request, respond with detailed information in $deviceLanguage."
+        val prompt =
+            "$inputText (respond in $deviceLanguage)"
         val imageList = selectedImageBitmaps.value
         val inputContent = content {
             if (imageList.isNotEmpty()) {
                 imageList.forEach { image ->
                     image(image = image)
                 }
-                text(text = imagePrompt + generalPrompt)
-            } else {
-                text(text = textPrompt + generalPrompt)
             }
+            text(text = prompt)
         }
 
         viewModelScope.launch {
@@ -63,7 +57,7 @@ class GeminiViewModel(
                     _uiState.value = GeminiUiState.Success(outputContent)
                 }
             } catch (e: Exception) {
-                _uiState.value = GeminiUiState.Error(e.localizedMessage ?: "")
+                _uiState.value = GeminiUiState.Error(errorMessage = e.localizedMessage ?: "")
             }
         }
     }
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index ebc7b66..4091d76 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,6 +1,6 @@
 [versions]
-agp = "8.4.0-alpha07"
-kotlin = "1.9.0"
+agp = "8.2.2"
+kotlin = "1.9.22"
 coreKtx = "1.12.0"
 junit = "4.13.2"
 junitVersion = "1.1.5"