diff --git a/app/build.gradle b/app/build.gradle
index b5ea32fd..50f832aa 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -89,7 +89,7 @@ dependencies {
     implementation 'com.google.code.gson:gson:2.10.1'
 
     implementation project(':sdk') // 가맹점은 이 코드가 아닌 아래와 같은 "버전"을 통한 implementation 으로 반영해주세요
-//    implementation 'com.github.iamport:iamport-android:1.3.4'
+//    implementation 'com.github.iamport:iamport-android:1.4.5'
 //    implementation 'com.github.iamport:iamport-android:fix~custom_data-SNAPSHOT'
 
 }
diff --git a/app/src/main/java/com/iamport/sampleapp/ui/PaymentResultFragment.kt b/app/src/main/java/com/iamport/sampleapp/ui/PaymentResultFragment.kt
index eba83b6a..1181d935 100644
--- a/app/src/main/java/com/iamport/sampleapp/ui/PaymentResultFragment.kt
+++ b/app/src/main/java/com/iamport/sampleapp/ui/PaymentResultFragment.kt
@@ -38,6 +38,6 @@ class PaymentResultFragment : Fragment() {
         if (iamPortResponse == null) {
             return false
         }
-        return iamPortResponse.success == true || iamPortResponse.imp_success == true
+        return iamPortResponse.imp_success == true || iamPortResponse.success == true || (iamPortResponse.error_code == null && iamPortResponse.code == null)
     }
 }
\ No newline at end of file
diff --git a/build.gradle.kts b/build.gradle.kts
index dc426b63..418bdaf1 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,11 +1,5 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    repositories {
-        google()
-        mavenCentral()
-        gradlePluginPortal()
-        maven { setUrl("https://jitpack.io") }
-    }
     dependencies {
         classpath("org.jetbrains.kotlin:kotlin-serialization:${Versions.kotlin_stdlib_jdk}")
     }
@@ -16,15 +10,6 @@ plugins {
     `update-dependency`
 }
 
-allprojects {
-    repositories {
-        google()
-        mavenCentral()
-        gradlePluginPortal()
-        maven { setUrl("https://jitpack.io") }
-    }
-}
-
 tasks.register<Delete>("clean") {
     delete(rootProject.layout.buildDirectory)
 }
diff --git a/buildSrc/src/main/java/Dependencies.kt b/buildSrc/src/main/java/Dependencies.kt
index 3206fd6d..58d43bb0 100644
--- a/buildSrc/src/main/java/Dependencies.kt
+++ b/buildSrc/src/main/java/Dependencies.kt
@@ -1,8 +1,8 @@
 // 디펜던시 업데이트 확인 ./gradlew dependencyUpdates
 
 object Versions {
-    const val versionCode = 240215000 // yymmdd000
-    const val versionName = "1.4.4"  // https://www.notion.so/chaifinance/QA-Process-d1a4be396337493b81c6e85fff2d5cd6
+    const val versionCode = 240725000 // yymmdd000
+    const val versionName = "1.4.5"  // https://www.notion.so/chaifinance/QA-Process-d1a4be396337493b81c6e85fff2d5cd6
 
     const val multidex = "2.0.1"
     const val kotlin_stdlib_jdk = "1.9.10"
@@ -44,14 +44,13 @@ object Versions {
     const val rxandroid = "2.1.1"
     const val rxjava2_debug = "1.4.0"
 
-    // loading animation
-    const val spinKit = "1.4.0"
-
     const val robolectric = "4.7.3"
 
     const val serialization = "1.6.0"
 
     const val workRuntimeKtx = "2.8.1"
+
+    const val lottie = "6.4.1"
 }
 
 object Libs {
@@ -120,14 +119,12 @@ object Libs {
     const val rxandroid = "io.reactivex.rxjava2:rxandroid:${Versions.rxandroid}"
     const val rxjava2_debug = "com.akaita.java:rxjava2-debug:${Versions.rxjava2_debug}"
 
-    // loading animation
-    const val spinKit = "com.github.ybq:Android-SpinKit:${Versions.spinKit}"
-
     const val serialization = "org.jetbrains.kotlinx:kotlinx-serialization-json:${Versions.serialization}"
 
     // target android 12 pending intent 처리를 위해 추가
     // Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
     const val workRuntimeKtx = "androidx.work:work-runtime-ktx:${Versions.workRuntimeKtx}"
 
+    const val lottie = "com.airbnb.android:lottie:${Versions.lottie}"
 }
 
diff --git a/sdk/build.gradle.kts b/sdk/build.gradle.kts
index ff051f5c..bf2e2a15 100644
--- a/sdk/build.gradle.kts
+++ b/sdk/build.gradle.kts
@@ -43,12 +43,6 @@ android {
         }
     }
 
-    repositories {
-        flatDir {
-            dirs("libs")
-        }
-    }
-
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_17
         targetCompatibility = JavaVersion.VERSION_17
@@ -143,10 +137,8 @@ dependencies {
     implementation(Libs.rxandroid)
     implementation(Libs.rxjava2_debug)
 
-    // loading animation
-    implementation(Libs.spinKit)
-
     implementation(Libs.serialization)
     implementation(Libs.workRuntimeKtx)
 
+    implementation(Libs.lottie)
 }
\ No newline at end of file
diff --git a/sdk/src/main/assets/iamportcdn.html b/sdk/src/main/assets/iamportcdn.html
index 75b94399..9b4e6a62 100644
--- a/sdk/src/main/assets/iamportcdn.html
+++ b/sdk/src/main/assets/iamportcdn.html
@@ -62,6 +62,6 @@
 
         </script>
         <script defer type="text/javascript" src="https://code.jquery.com/jquery-latest.min.js"></script>
-        <script defer type="text/javascript" src="https://cdn.iamport.kr/js/iamport.payment-1.2.0.js"></script>
+        <script defer type="text/javascript" src="https://cdn.iamport.kr/v1/iamport.js"></script>
     </body>
 </html>
\ No newline at end of file
diff --git a/sdk/src/main/assets/mobileweb.html b/sdk/src/main/assets/mobileweb.html
index 7b3f9294..f414436b 100644
--- a/sdk/src/main/assets/mobileweb.html
+++ b/sdk/src/main/assets/mobileweb.html
@@ -7,7 +7,7 @@
     <!-- jQuery -->
     <script defer type="text/javascript" src="https://code.jquery.com/jquery-latest.min.js"></script>
     <!-- iamport.payment.js -->
-    <script defer type="text/javascript" src="https://cdn.iamport.kr/js/iamport.payment-1.2.0.js"></script>
+    <script defer type="text/javascript" src="https://cdn.iamport.kr/v1/iamport.js"></script>
 
     <style type="text/css">
         html, body, button {
diff --git a/sdk/src/main/java/com/iamport/sdk/data/sdk/IamPortResponse.kt b/sdk/src/main/java/com/iamport/sdk/data/sdk/IamPortResponse.kt
index b4c1b71a..8188d6c8 100644
--- a/sdk/src/main/java/com/iamport/sdk/data/sdk/IamPortResponse.kt
+++ b/sdk/src/main/java/com/iamport/sdk/data/sdk/IamPortResponse.kt
@@ -24,9 +24,12 @@ data class IamPortResponse(
     val imp_success: Boolean? = false,
     val success: Boolean? = false,
     val imp_uid: String?,
+    val txId: String? = null,
     val merchant_uid: String?,
     val error_msg: String? = null,
+    val message: String? = null,
     val error_code: String? = null,
+    val code: String? = null,
 ) : Parcelable {
     companion object {
         fun makeSuccess(payment: Payment, impUid: String? = null, msg: String): IamPortResponse {
diff --git a/sdk/src/main/java/com/iamport/sdk/data/sdk/PG.kt b/sdk/src/main/java/com/iamport/sdk/data/sdk/PG.kt
index 6eb6d618..d4e9438c 100644
--- a/sdk/src/main/java/com/iamport/sdk/data/sdk/PG.kt
+++ b/sdk/src/main/java/com/iamport/sdk/data/sdk/PG.kt
@@ -35,7 +35,7 @@ enum class PG(val korName: String) {
     payco("페이코"), eximbay("엑심베이"), settle("세틀뱅크"), settle_firm("세틀뱅크_펌"),
     /*naverco("네이버페이-주문형"),*/ naverpay("네이버페이-결제형"), smilepay("스마일페이"),
     payple("페이플"), alipay("알리페이"),
-    bluewalnut("bluewalnut"), tosspay("간편결제 - 토스"), smartro("스마트로"); /*, inicis("이니시스ActiveX결제창"), syrup("시럽페이");*/
+    bluewalnut("bluewalnut"), tosspay("간편결제 - 토스"), smartro("스마트로"), nice_v2("나이스페이 V2"); /*, inicis("이니시스ActiveX결제창"), syrup("시럽페이");*/
 
     fun makePgRawName(pgId: String? = null): String {
         return "${this.name}${if (!pgId.isNullOrBlank()) ".${pgId}" else CONST.EMPTY_STR}"
@@ -43,11 +43,11 @@ enum class PG(val korName: String) {
 
     companion object {
         fun convertPG(pgString: String): PG? {
-            return values().find { pgString == (it.name) }
+            return entries.find { pgString == (it.name) }
         }
 
         fun getPGNames(): List<String> {
-            return values().map { "${it.korName} (${it.name})" }.toList()
+            return entries.map { "${it.korName} (${it.name})" }.toList()
         }
     }
 }
\ No newline at end of file
diff --git a/sdk/src/main/java/com/iamport/sdk/presentation/activity/WebViewActivity.kt b/sdk/src/main/java/com/iamport/sdk/presentation/activity/WebViewActivity.kt
index 7e0194ec..1ee29cb6 100644
--- a/sdk/src/main/java/com/iamport/sdk/presentation/activity/WebViewActivity.kt
+++ b/sdk/src/main/java/com/iamport/sdk/presentation/activity/WebViewActivity.kt
@@ -5,7 +5,7 @@ import android.content.Intent
 import android.net.Uri
 import android.view.View
 import android.webkit.WebView
-import android.widget.ProgressBar
+import com.airbnb.lottie.LottieAnimationView
 import com.google.gson.GsonBuilder
 import com.iamport.sdk.R
 import com.iamport.sdk.data.sdk.IamPortResponse
@@ -28,7 +28,7 @@ class WebViewActivity : BaseActivity<WebViewModel>(), IamportKoinComponent {
     override val layoutResourceId: Int = R.layout.webview_activity
     override val viewModel: WebViewModel by viewModel()
 
-    private lateinit var loading: ProgressBar
+    private lateinit var loading: LottieAnimationView
     private lateinit var webview: WebView
     private var payment: Payment? = null
 
diff --git a/sdk/src/main/res/layout/loading.xml b/sdk/src/main/res/layout/loading.xml
index 94338bcd..fc449431 100644
--- a/sdk/src/main/res/layout/loading.xml
+++ b/sdk/src/main/res/layout/loading.xml
@@ -1,8 +1,7 @@
-<com.github.ybq.android.spinkit.SpinKitView xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/spin_kit"
-    style="@style/SpinKitView.Large.FadingCircle"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    android:layout_gravity="center"
-    app:SpinKit_Color="#6066FF" />
\ No newline at end of file
+<com.airbnb.lottie.LottieAnimationView
+    id="@+id/animationView"
+    layout_width="match_parent"
+    layout_height="wrap_content"
+    lottie_rawRes="@raw/animation"
+    lottie_autoPlay="true"
+    lottie_loop="true"/>
\ No newline at end of file
diff --git a/sdk/src/main/res/raw/animation.json b/sdk/src/main/res/raw/animation.json
new file mode 100644
index 00000000..1e7057b8
--- /dev/null
+++ b/sdk/src/main/res/raw/animation.json
@@ -0,0 +1 @@
+{"v":"4.6.8","fr":29.9700012207031,"ip":0,"op":119.000004846969,"w":256,"h":256,"nm":"Comp 1","ddd":0,"assets":[],"layers":[{"ddd":0,"ind":1,"ty":4,"nm":"Shape Layer 4","ks":{"o":{"a":0,"k":100},"r":{"a":0,"k":0},"p":{"a":0,"k":[128,128.016,0]},"a":{"a":0,"k":[13,13.016,0]},"s":{"a":0,"k":[100,100,100]}},"ao":0,"shapes":[{"ty":"gr","it":[{"d":1,"ty":"el","s":{"a":0,"k":[200,200]},"p":{"a":0,"k":[0,0]},"nm":"Ellipse Path 1","mn":"ADBE Vector Shape - Ellipse"},{"ty":"tm","s":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":92,"s":[0],"e":[25]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":105,"s":[25],"e":[49]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":112,"s":[49],"e":[100]},{"t":120.0000048877}],"ix":1},"e":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":90,"s":[1],"e":[100]},{"t":120.0000048877}],"ix":2},"o":{"a":0,"k":0,"ix":3},"m":1,"ix":2,"nm":"Trim Paths 1","mn":"ADBE Vector Filter - Trim"},{"ty":"st","c":{"a":0,"k":[0.023529,0.854902,0.238708,1]},"o":{"a":0,"k":100},"w":{"a":0,"k":20},"lc":2,"lj":1,"ml":4,"nm":"Stroke 1","mn":"ADBE Vector Graphic - Stroke"},{"ty":"tr","p":{"a":0,"k":[12,13],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[100,100],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"Transform"}],"nm":"Ellipse 1","np":4,"cix":2,"ix":1,"mn":"ADBE Vector Group"}],"ip":90.0000036657751,"op":390.000015885026,"st":90.0000036657751,"bm":0,"sr":1},{"ddd":0,"ind":2,"ty":4,"nm":"Shape Layer 3","ks":{"o":{"a":0,"k":100},"r":{"a":0,"k":0},"p":{"a":0,"k":[128,128.016,0]},"a":{"a":0,"k":[13,13.016,0]},"s":{"a":0,"k":[100,100,100]}},"ao":0,"shapes":[{"ty":"gr","it":[{"d":1,"ty":"el","s":{"a":0,"k":[200,200]},"p":{"a":0,"k":[0,0]},"nm":"Ellipse Path 1","mn":"ADBE Vector Shape - Ellipse"},{"ty":"tm","s":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":62,"s":[0],"e":[25]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":75,"s":[25],"e":[49]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":82,"s":[49],"e":[100]},{"t":90.0000036657751}],"ix":1},"e":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":60,"s":[1],"e":[100]},{"t":90.0000036657751}],"ix":2},"o":{"a":0,"k":0,"ix":3},"m":1,"ix":2,"nm":"Trim Paths 1","mn":"ADBE Vector Filter - Trim"},{"ty":"st","c":{"a":0,"k":[0.854902,0.023529,0.2582694,1]},"o":{"a":0,"k":100},"w":{"a":0,"k":20},"lc":2,"lj":1,"ml":4,"nm":"Stroke 1","mn":"ADBE Vector Graphic - Stroke"},{"ty":"tr","p":{"a":0,"k":[12,13],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[100,100],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"Transform"}],"nm":"Ellipse 1","np":4,"cix":2,"ix":1,"mn":"ADBE Vector Group"}],"ip":60.0000024438501,"op":360.000014663101,"st":60.0000024438501,"bm":0,"sr":1},{"ddd":0,"ind":3,"ty":4,"nm":"Shape Layer 2","ks":{"o":{"a":0,"k":100},"r":{"a":0,"k":0},"p":{"a":0,"k":[128,128.016,0]},"a":{"a":0,"k":[13,13.016,0]},"s":{"a":0,"k":[100,100,100]}},"ao":0,"shapes":[{"ty":"gr","it":[{"d":1,"ty":"el","s":{"a":0,"k":[200,200]},"p":{"a":0,"k":[0,0]},"nm":"Ellipse Path 1","mn":"ADBE Vector Shape - Ellipse"},{"ty":"tm","s":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":32,"s":[0],"e":[25]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":45,"s":[25],"e":[49]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":52,"s":[49],"e":[100]},{"t":60.0000024438501}],"ix":1},"e":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":30,"s":[1],"e":[100]},{"t":60.0000024438501}],"ix":2},"o":{"a":0,"k":0,"ix":3},"m":1,"ix":2,"nm":"Trim Paths 1","mn":"ADBE Vector Filter - Trim"},{"ty":"st","c":{"a":0,"k":[0.023529,0.6886272,0.854902,1]},"o":{"a":0,"k":100},"w":{"a":0,"k":20},"lc":2,"lj":1,"ml":4,"nm":"Stroke 1","mn":"ADBE Vector Graphic - Stroke"},{"ty":"tr","p":{"a":0,"k":[12,13],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[100,100],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"Transform"}],"nm":"Ellipse 1","np":4,"cix":2,"ix":1,"mn":"ADBE Vector Group"}],"ip":30.0000012219251,"op":330.000013441176,"st":30.0000012219251,"bm":0,"sr":1},{"ddd":0,"ind":4,"ty":4,"nm":"Shape Layer 1","ks":{"o":{"a":0,"k":100},"r":{"a":0,"k":0},"p":{"a":0,"k":[128,128.016,0]},"a":{"a":0,"k":[13,13.016,0]},"s":{"a":0,"k":[100,100,100]}},"ao":0,"shapes":[{"ty":"gr","it":[{"d":1,"ty":"el","s":{"a":0,"k":[200,200]},"p":{"a":0,"k":[0,0]},"nm":"Ellipse Path 1","mn":"ADBE Vector Shape - Ellipse"},{"ty":"tm","s":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":2,"s":[0],"e":[25]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":15,"s":[25],"e":[49]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":22,"s":[49],"e":[100]},{"t":30.0000012219251}],"ix":1},"e":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"n":["0p667_1_0p333_0"],"t":0,"s":[1],"e":[100]},{"t":30.0000012219251}],"ix":2},"o":{"a":0,"k":0,"ix":3},"m":1,"ix":2,"nm":"Trim Paths 1","mn":"ADBE Vector Filter - Trim"},{"ty":"st","c":{"a":0,"k":[0.854902,0.54902,0.023529,1]},"o":{"a":0,"k":100},"w":{"a":0,"k":20},"lc":2,"lj":1,"ml":4,"nm":"Stroke 1","mn":"ADBE Vector Graphic - Stroke"},{"ty":"tr","p":{"a":0,"k":[12,13],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[100,100],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"Transform"}],"nm":"Ellipse 1","np":4,"cix":2,"ix":1,"mn":"ADBE Vector Group"}],"ip":0,"op":300.00001221925,"st":0,"bm":0,"sr":1}]}
\ No newline at end of file
diff --git a/settings.gradle.kts b/settings.gradle.kts
index ad133df4..f5e986cd 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,3 +1,16 @@
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        flatDir {
+            dirs("libs")
+        }
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+        maven { setUrl("https://jitpack.io") }
+    }
+}
+
 rootProject.name = "AndroidSdk"
 include(":sdk")
 include(":app")