diff --git a/build.gradle.kts b/build.gradle.kts
index 424b927..db27887 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,20 +1,21 @@
 plugins {
     id("java")
-    id("com.gradleup.shadow") version "8.3.2"
+    id("com.gradleup.shadow") version "9.1.0"
     id("xyz.jpenilla.run-paper") version "2.3.0"
 }
 
 group = "xyz.ineanto"
 version = "1.3.0"
 
-val invuiVersion: String = "1.44"
+val invuiVersion: String = "1.46"
+val jacksonVersion: String = "2.20.0"
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_22
-    targetCompatibility = JavaVersion.VERSION_22
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
 
     toolchain {
-        languageVersion = JavaLanguageVersion.of(22)
+        languageVersion = JavaLanguageVersion.of(21)
     }
 }
 
@@ -30,19 +31,18 @@ repositories {
 }
 
 dependencies {
-    compileOnly("io.papermc.paper:paper-api:1.21.6-R0.1-SNAPSHOT")
+    compileOnly("io.papermc.paper:paper-api:1.21.8-R0.1-SNAPSHOT")
 
     compileOnly("me.clip:placeholderapi:2.11.5")
     compileOnly("net.kyori:adventure-api:4.21.0")
     compileOnly("xyz.xenondevs.invui:invui-core:$invuiVersion")
     compileOnly("net.wesjd:anvilgui:1.10.4-SNAPSHOT")
 
-    implementation("com.github.retrooper:packetevents-spigot:2.8.0")
+    implementation("com.github.retrooper:packetevents-spigot:2.9.0")
 
-    implementation("de.rapha149.signgui:signgui:2.5.0")
     implementation("com.github.jsixface:yamlconfig:1.2")
-    implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.18.1")
-    implementation("com.fasterxml.jackson.core:jackson-core:2.18.1")
+    implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:$jacksonVersion")
+    implementation("com.fasterxml.jackson.core:jackson-core:$jacksonVersion")
     implementation("com.mysql:mysql-connector-j:9.2.0")
     implementation("org.mariadb.jdbc:mariadb-java-client:3.5.2")
     implementation("redis.clients:jedis:5.2.0")
@@ -90,18 +90,17 @@ tasks {
         // MINIFY
         minimize {
             exclude(dependency("xyz.xenondevs.invui:.*"))
-            exclude(dependency("de.rapha149.signgui:.*"))
         }
     }
 
     runServer {
         downloadPlugins {
-            url("https://download.luckperms.net/1593/bukkit/loader/LuckPerms-Bukkit-5.5.8.jar")
+            //url("https://download.luckperms.net/1593/bukkit/loader/LuckPerms-Bukkit-5.5.8.jar")
 
             // 1.20.5 - latest testing
-            url("https://ci.dmulloy2.net/job/ProtocolLib/lastSuccessfulBuild/artifact/build/libs/ProtocolLib.jar")
+            //url("https://ci.dmulloy2.net/job/ProtocolLib/lastSuccessfulBuild/artifact/build/libs/ProtocolLib.jar")
         }
 
-        minecraftVersion("1.21.5")
+        minecraftVersion("1.21.8")
     }
 }
\ No newline at end of file
diff --git a/src/main/java/xyz/ineanto/nicko/appearance/AppearanceManager.java b/src/main/java/xyz/ineanto/nicko/appearance/AppearanceManager.java
index cd22e5f..70c2765 100644
--- a/src/main/java/xyz/ineanto/nicko/appearance/AppearanceManager.java
+++ b/src/main/java/xyz/ineanto/nicko/appearance/AppearanceManager.java
@@ -46,6 +46,7 @@ public class AppearanceManager {
     }
 
     public ActionResult update(boolean skinChange) {
+        // TODO (Ineanto, 30/06/2025): Name is not updated when joining ONLY?
         final NickoProfile profile = getNickoProfile();
         final String displayName = profile.getName() == null ? player.getName() : profile.getName();
 
diff --git a/src/main/java/xyz/ineanto/nicko/packet/PacketEventsPacketSender.java b/src/main/java/xyz/ineanto/nicko/packet/PacketEventsPacketSender.java
index 0563492..ac17fcb 100644
--- a/src/main/java/xyz/ineanto/nicko/packet/PacketEventsPacketSender.java
+++ b/src/main/java/xyz/ineanto/nicko/packet/PacketEventsPacketSender.java
@@ -16,6 +16,7 @@ import net.kyori.adventure.text.Component;
 import org.bukkit.Bukkit;
 import org.bukkit.World;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 import xyz.ineanto.nicko.Nicko;
 import xyz.ineanto.nicko.appearance.ActionResult;
 import xyz.ineanto.nicko.language.LanguageKey;
@@ -94,7 +95,7 @@ public record PacketEventsPacketSender(Player player, NickoProfile profile) impl
     @Override
     public void sendEntityMetadataUpdate() {
         // This was surprisingly easy to write?
-        final EntityData<Byte> entityData = new EntityData<>(17, EntityDataTypes.BYTE, (byte) 0x7f);
+        final EntityData<@NotNull Byte> entityData = new EntityData<>(17, EntityDataTypes.BYTE, (byte) 0x7f);
         final WrapperPlayServerEntityMetadata metadata = new WrapperPlayServerEntityMetadata(player.getEntityId(), List.of(entityData));
 
         sendPacket(metadata, player);