diff --git a/Dockerfile b/Dockerfile
index cdd97dd..47b3fbd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ WORKDIR /app
 COPY --chown=1000 --link docker /app
 
 # Download Velocity
-ADD --chown=1000 --link https://api.papermc.io/v2/projects/velocity/versions/3.3.0-SNAPSHOT/builds/414/downloads/velocity-3.3.0-SNAPSHOT-414.jar /app/velocity.jar
+ADD --chown=1000 --checksum=sha256:845cb2c1891544ad9e432883d7ddf059284d9d178b97be4977e5f805746c9edd --link https://api.papermc.io/v2/projects/velocity/versions/3.4.0-SNAPSHOT/builds/450/downloads/velocity-3.4.0-SNAPSHOT-450.jar /app/velocity.jar
 
 # Run Server
 EXPOSE 25565
diff --git a/build.gradle b/build.gradle
index b9bdb7e..1b92b7b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,9 +1,9 @@
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 plugins {
-    id 'org.jetbrains.kotlin.jvm' version '2.0.10'
-    id "org.jetbrains.kotlin.kapt" version "2.0.10"
-    id 'com.gradleup.shadow' version '8.3.0'
+    id 'org.jetbrains.kotlin.jvm' version '2.0.21'
+    id "org.jetbrains.kotlin.kapt" version "2.0.21"
+    id 'com.gradleup.shadow' version '8.3.5'
 }
 
 group 'one.oktw'
@@ -23,14 +23,14 @@ repositories {
 }
 
 dependencies {
-    kapt 'com.velocitypowered:velocity-api:3.3.0-SNAPSHOT'
-    compileOnly 'com.velocitypowered:velocity-api:3.3.0-SNAPSHOT'
-    implementation 'io.fabric8:kubernetes-client:6.13.3'
-    implementation 'io.fabric8:kubernetes-httpclient-okhttp:6.13.3'
+    kapt 'com.velocitypowered:velocity-api:3.4.0-SNAPSHOT'
+    compileOnly 'com.velocitypowered:velocity-api:3.4.0-SNAPSHOT'
+    implementation 'io.fabric8:kubernetes-client:6.13.4'
+    implementation 'io.fabric8:kubernetes-httpclient-okhttp:6.13.4'
     implementation 'com.github.fkorotkov:k8s-kotlin-dsl:3.3.0'
-    implementation 'io.lettuce:lettuce-core:6.4.0.RELEASE'
+    implementation 'io.lettuce:lettuce-core:6.5.0.RELEASE'
     implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-reactive' // lettuce need this
-    implementation 'one.oktw:galaxy-lib:7376fcdf'
+    implementation 'one.oktw:galaxy-lib:c328418'
 }
 
 compileKotlin {
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 2c35211..a4b76b9 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 09523c0..df97d72 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/src/main/kotlin/one/oktw/galaxy/proxy/config/model/ProxyConfig.kt b/src/main/kotlin/one/oktw/galaxy/proxy/config/model/ProxyConfig.kt
index bed21e0..e7c13a6 100644
--- a/src/main/kotlin/one/oktw/galaxy/proxy/config/model/ProxyConfig.kt
+++ b/src/main/kotlin/one/oktw/galaxy/proxy/config/model/ProxyConfig.kt
@@ -1,5 +1,5 @@
 package one.oktw.galaxy.proxy.config.model
 
 data class ProxyConfig(
-    val ProtocolVersion: Int = 498 // default Minecraft 1.14.4
+    val ProtocolVersion: Int = 768 // default Minecraft 1.21.3
 )
diff --git a/src/main/resources/config/proxy.json b/src/main/resources/config/proxy.json
index acae75f..35c63c2 100644
--- a/src/main/resources/config/proxy.json
+++ b/src/main/resources/config/proxy.json
@@ -1,3 +1,3 @@
 {
-    "ProtocolVersion": 767
+    "ProtocolVersion": 768
 }