diff --git a/.gitignore b/.gitignore
index 3c3cef3..dccd6cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,6 +19,9 @@ captures/
 *.jks
 *.keystore
 
+# Key properties (contains sensitive signing info)
+app/key.properties
+
 # External native build folder generated in Android Studio 2.2 and later
 .externalNativeBuild
 .cxx/
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 8ab4813..332b5e4 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -1,3 +1,14 @@
+import java.util.Properties
+import java.io.FileInputStream
+
+// Load keystore properties
+val keystorePropertiesFile = rootProject.file("app/key.properties")
+val keystoreProperties = Properties()
+if (keystorePropertiesFile.exists()) {
+    keystoreProperties.load(FileInputStream(keystorePropertiesFile))
+}
+
+
 plugins {
     id("com.android.application")
     id("org.jetbrains.kotlin.android")
@@ -6,35 +17,45 @@ plugins {
 }
 
 android {
-    namespace = "com.hotdeal.alarm"
-    compileSdk = 35
+ namespace = "com.hotdeal.alarm"
+ compileSdk = 35
 
-    defaultConfig {
-        applicationId = "com.hotdeal.alarm"
-        minSdk = 31
-        targetSdk = 35
-        versionCode = 1
-        versionName = "1.0.0"
+ defaultConfig {
+ applicationId = "com.hotdeal.alarm"
+ minSdk = 31
+ targetSdk = 35
+ versionCode = 1
+ versionName = "1.0.0"
 
-        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
-        vectorDrawables {
-            useSupportLibrary = true
-        }
-    }
+ testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+ vectorDrawables {
+ useSupportLibrary = true
+ }
+ }
 
-    buildTypes {
-        release {
-            isMinifyEnabled = true
-            isShrinkResources = true
-            proguardFiles(
-                getDefaultProguardFile("proguard-android-optimize.txt"),
-                "proguard-rules.pro"
-            )
-        }
-        debug {
-            isMinifyEnabled = false
-        }
-    }
+ signingConfigs {
+ create("release") {
+ keyAlias = keystoreProperties["keyAlias"] as String?
+ keyPassword = keystoreProperties["keyPassword"] as String?
+ storeFile = keystoreProperties["storeFile"]?.let { file("$it") }
+ storePassword = keystoreProperties["storePassword"] as String?
+ }
+ }
+
+ buildTypes {
+ release {
+ isMinifyEnabled = true
+ isShrinkResources = true
+ proguardFiles(
+ getDefaultProguardFile("proguard-android-optimize.txt"),
+ "proguard-rules.pro"
+ )
+ signingConfig = signingConfigs.getByName("release")
+ }
+ debug {
+ isMinifyEnabled = false
+ }
+ }
 
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_17
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index fa4a837..51e276b 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -16,3 +16,7 @@
 # Kotlin Coroutines
 -keepnames class kotlinx.coroutines.internal.MainDispatcherFactory {}
 -keepnames class kotlinx.coroutines.CoroutineExceptionHandler {}
+
+# JSpecify annotations (for Jsoup compatibility)
+-dontwarn org.jspecify.annotations.**
+
diff --git a/app/src/main/java/com/hotdeal/alarm/presentation/main/MainViewModel.kt b/app/src/main/java/com/hotdeal/alarm/presentation/main/MainViewModel.kt
index d45c524..cd1217a 100644
--- a/app/src/main/java/com/hotdeal/alarm/presentation/main/MainViewModel.kt
+++ b/app/src/main/java/com/hotdeal/alarm/presentation/main/MainViewModel.kt
@@ -26,9 +26,9 @@ class MainViewModel @Inject constructor(
     private val _uiState = MutableStateFlow<MainUiState>(MainUiState.Loading)
     val uiState: StateFlow<MainUiState> = _uiState.asStateFlow()
     
-    // 폴� 주기
+    // 폴링 주기 (저장된 값 즉시 반영)
     val pollingInterval: StateFlow<Int> = appSettings.pollingInterval
-        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), 2)
+        .stateIn(viewModelScope, SharingStarted.Eagerly, 2)
     
     init {
         initializeApp()