diff --git a/Dockerfile b/Dockerfile
index 47b3fbd..dd1ec02 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ WORKDIR /app
 COPY --chown=1000 --link docker /app
 
 # Download Velocity
-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
+ADD --chown=1000 --checksum=sha256:bb54dcd34751bf8e345d0a39199eb985d64d07f8626810ed7b0e058f47d595c0 --link https://api.papermc.io/v2/projects/velocity/versions/3.4.0-SNAPSHOT/builds/453/downloads/velocity-3.4.0-SNAPSHOT-453.jar /app/velocity.jar
 
 # Run Server
 EXPOSE 25565
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 e7c13a6..2fc74cc 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 = 768 // default Minecraft 1.21.3
+    val ProtocolVersion: Int = 769 // default Minecraft 1.21.4
 )
diff --git a/src/main/resources/config/proxy.json b/src/main/resources/config/proxy.json
index 35c63c2..a493bf9 100644
--- a/src/main/resources/config/proxy.json
+++ b/src/main/resources/config/proxy.json
@@ -1,3 +1,3 @@
 {
-    "ProtocolVersion": 768
+    "ProtocolVersion": 769
 }