diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index d52c0b0d..bbeea0b9 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -22,28 +22,33 @@ android {
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
 
+        // 👇 공식 API + providers 사용
+        val localProps = gradleLocalProperties(rootDir, providers)
+
         buildConfigField(
             "String",
             "NATIVE_APP_KEY",
-            gradleLocalProperties(rootDir).getProperty("native.app.key"),
+            "\"${localProps.getProperty("native.app.key")}\""
         )
-        manifestPlaceholders["NATIVE_APP_KEY"] =
-            gradleLocalProperties(rootDir).getProperty("nativeAppKey")
+        // manifestPlaceholders는 문자열 그 자체를 넣으면 됨(따옴표 불필요)
+        manifestPlaceholders["NATIVE_APP_KEY"] = localProps.getProperty("nativeAppKey")
     }
 
     buildTypes {
         debug {
+            val localProps = gradleLocalProperties(rootDir, providers)
             buildConfigField(
                 "String",
                 "BASE_URL",
-                gradleLocalProperties(rootDir).getProperty("test.base.url")
+                "\"${localProps.getProperty("test.base.url")}\""
             )
         }
         release {
+            val localProps = gradleLocalProperties(rootDir, providers)
             buildConfigField(
                 "String",
                 "BASE_URL",
-                gradleLocalProperties(rootDir).getProperty("base.url")
+                "\"${localProps.getProperty("base.url")}\""
             )
             isMinifyEnabled = false
             proguardFiles(
diff --git a/buildSrc/src/main/kotlin/Constants.kt b/buildSrc/src/main/kotlin/Constants.kt
index 2c92e510..b706777c 100644
--- a/buildSrc/src/main/kotlin/Constants.kt
+++ b/buildSrc/src/main/kotlin/Constants.kt
@@ -1,8 +1,8 @@
 object Constants {
     const val packageName = "com.going.doorip"
-    const val compileSdk = 34
+    const val compileSdk = 35
     const val minSdk = 28
-    const val targetSdk = 34
-    const val versionCode = 12
-    const val versionName = "1.2"
+    const val targetSdk = 35
+    const val versionCode = 14
+    const val versionName = "1.4"
 }
diff --git a/buildSrc/src/main/kotlin/Versions.kt b/buildSrc/src/main/kotlin/Versions.kt
index 1812a6e7..ac0f9493 100644
--- a/buildSrc/src/main/kotlin/Versions.kt
+++ b/buildSrc/src/main/kotlin/Versions.kt
@@ -1,49 +1,77 @@
 import org.gradle.api.JavaVersion
 
 object Versions {
-    const val gradleVersion = "8.0.2"
-
-    const val buildToolsVersion = "30.0.3"
-    const val kotlinVersion = "1.8.20"
-    const val kotlinSerializationJsonVersion = "1.5.1"
-    const val kotlinDateTimeVersion = "0.4.0"
-    const val coreKtxVersion = "1.10.1"
-    const val appCompatVersion = "1.6.1"
-    const val materialDesignVersion = "1.9.0"
-    const val constraintLayoutVersion = "2.1.4"
+    // AGP (com.android.tools.build:gradle)
+    // plugins { id("com.android.application") version "8.7.2" } 로 맞춰 쓰는 걸 권장
+    const val gradleVersion = "8.7.2"
+
+    // buildToolsVersion는 AGP 8.x부터 명시 불필요. 그래도 상수 유지하려면 35로.
+    const val buildToolsVersion = "35.0.0"
+
+    // Kotlin
+    const val kotlinVersion = "1.9.24"
+    const val kotlinSerializationJsonVersion = "1.6.3"
+    const val kotlinDateTimeVersion = "0.6.1"        // 최신권장
+
+    // AndroidX core / appcompat / material
+    const val coreKtxVersion = "1.13.1"
+    const val appCompatVersion = "1.7.0"
+    const val materialDesignVersion = "1.12.0"
+
+    // UI
+    const val constraintLayoutVersion = "2.1.4"      // 2.2.0은 아직 안정화 대기
+    const val flexboxVersion = "3.0.0"
+    const val circleIndicatorVersion = "2.1.6"
+    const val circleImageViewVersion = "3.1.0"
+    const val shimmerVersion = "0.5.0"
+
+    // App Startup / Legacy / Security
     const val appStartUpVersion = "1.1.1"
     const val legacySupportVersion = "1.0.0"
-    const val securityVersion = "1.1.0-alpha06"
-    const val hiltVersion = "2.46.1"
-    const val activityKtxVersion = "1.7.2"
-    const val fragmentKtxVersion = "1.5.7"
-    const val coroutinesAndroidVersion = "1.7.1"
-    const val pagingVersion = "3.1.1"
-    const val lifecycleVersion = "2.6.1"
-    const val ossPluginVersion = "0.10.4"
-    const val ossVersion = "17.0.0"
+    const val securityVersion = "1.1.0-alpha06"      // 안정판 대체 없으면 유지
+
+    // Hilt (Dagger)
+    const val hiltVersion = "2.51.1"
+
+    // Activity/Fragment/Lifecycle/Navi/Paging/Work/Splash
+    const val activityKtxVersion = "1.9.2"
+    const val fragmentKtxVersion = "1.8.3"
+    const val lifecycleVersion = "2.8.4"
+    const val navigationVersion = "2.8.0"
+    const val pagingVersion = "3.3.2"
+    const val workManagerVersion = "2.9.1"
     const val splashVersion = "1.0.1"
-    const val workManagerVersion = "2.8.1"
-    const val coilVersion = "2.4.0"
-    const val retrofitVersion = "2.9.0"
-    const val kotlinSerializationConverterVersion = "1.0.0"
-    const val okHttpVersion = "4.11.0"
+
+    // Coroutines
+    const val coroutinesAndroidVersion = "1.9.0"
+
+    // Networking
+    const val retrofitVersion = "2.11.0"
+    const val kotlinSerializationConverterVersion = "1.0.0" // (JakeWharton) 최신 여전히 1.0.0
+    const val okHttpVersion = "4.12.0"                      // OkHttp 5는 API 변화 큼 → 4.12 권장
+
+    // 이미지/애니메이션
+    const val coilVersion = "2.6.0"
+    const val lottieVersion = "6.4.1"
+
+    // 기타
     const val timberVersion = "5.0.1"
     const val progressViewVersion = "1.1.3"
     const val balloonVersion = "1.4.5"
-    const val lottieVersion = "6.0.0"
     const val circularProgressBar = "3.1.0"
     const val kakaoVersion = "2.19.0"
-    const val circleIndicatorVersion = "2.1.6"
-    const val shimmerVersion = "0.5.0"
-    const val navigationVersion = "2.6.0"
-    const val amplitudeVersion = "2.23.2"
+    const val amplitudeVersion = "2.23.2" // 프로젝트 요구 맞추되, 필요시 최신 확인
+
+    // 테스트
     const val junitVersion = "4.13.2"
-    const val espressoVersion = "3.3.0"
-    const val androidTestVersion = "1.1.2"
-    const val flexboxVersion = "3.0.0"
-    const val circleImageViewVersion = "3.1.0"
+    const val espressoVersion = "3.6.1"
+    const val androidTestVersion = "1.2.1" // androidx.test:runner / rules 세트 기준
+
+    // Java / JVM
+    val javaVersion = JavaVersion.VERSION_21
+    const val jvmVersion = "21"
 
-    val javaVersion = JavaVersion.VERSION_17
-    const val jvmVersion = "17"
+    // ▷ OSS Licenses
+    const val ossPluginVersion = "0.10.6"
+    const val ossVersion = "17.1.0"
 }
diff --git a/data/build.gradle.kts b/data/build.gradle.kts
index 4e010569..6e72500e 100644
--- a/data/build.gradle.kts
+++ b/data/build.gradle.kts
@@ -49,7 +49,7 @@ dependencies {
     ThirdPartyDependencies.run {
         implementation(retrofit)
         implementation(okHttp)
-        implementation(okHttpBom)
+        implementation(platform(okHttpBom))
         implementation(okHttpLoggingInterceptor)
         implementation(retrofitJsonConverter)
         implementation(timber)
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 02222dac..e1adfb49 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,5 @@
-#Fri Dec 29 23:45:17 KST 2023
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.0-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists