diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 3a72920..2bb797e 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -15,8 +15,8 @@ android {
         applicationId = "dev.chungjungsoo.gptmobile"
         minSdk = 28
         targetSdk = 34
-        versionCode = 3
-        versionName = "0.3.0"
+        versionCode = 4
+        versionName = "0.3.1"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {
@@ -40,7 +40,8 @@ android {
 
     buildTypes {
         release {
-            isMinifyEnabled = false
+            isMinifyEnabled = true
+            isShrinkResources = true
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"