diff --git a/build.gradle b/build.gradle
index 19dcdb9..e47cc33 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,12 +1,12 @@
 plugins {
     id "java"
     id "maven-publish"
-    id "net.minecrell.plugin-yml.bukkit" version "0.6.1-SNAPSHOT"
-    id 'com.github.johnrengelman.shadow' version '7.1.2'
+    id "net.minecrell.plugin-yml.bukkit" version "0.6.0"
+    id "com.gradleup.shadow" version "8.3.3"
 }
 
 group = "me.totalfreedom"
-version = "4.8"
+version = "4.9"
 description = "BukkitTelnet"
 
 repositories {
@@ -23,15 +23,16 @@ repositories {
 }
 
 dependencies {
-    compileOnly "io.papermc.paper:paper-api:1.18.2-R0.1-SNAPSHOT"
-    annotationProcessor "org.projectlombok:lombok:1.18.24"
-    library "org.projectlombok:lombok:1.18.24"
-    library "org.json:json:20220320"
-    compileOnly("com.github.MilkBowl:VaultAPI:1.7") {
+    compileOnly "io.papermc.paper:paper-api:1.21.1-R0.1-SNAPSHOT"
+    annotationProcessor "org.projectlombok:lombok:1.18.34"
+    library "org.projectlombok:lombok:1.18.34"
+    library "org.json:json:20240303"
+    compileOnly("com.github.MilkBowl:VaultAPI:1.7.1") {
         exclude group: "org.bukkit", module: "bukkit"
     }
-    library "org.apache.logging.log4j:log4j-api:2.17.2"
-    library "org.apache.logging.log4j:log4j-core:2.17.2"
+    implementation "org.apache.commons:commons-lang3:3.17.0"
+    library "org.apache.logging.log4j:log4j-api:2.24.1"
+    library "org.apache.logging.log4j:log4j-core:2.24.1"
 }
 tasks {
     jar {
@@ -40,7 +41,7 @@ tasks {
 }
 
 java {
-    toolchain.languageVersion.set(JavaLanguageVersion.of(17))
+    toolchain.languageVersion.set(JavaLanguageVersion.of(21))
 }
 
 tasks.withType(JavaCompile) {
@@ -50,7 +51,7 @@ tasks.withType(JavaCompile) {
 bukkit {
     name = "BukkitTelnet"
     main = "me.totalfreedom.bukkittelnet.BukkitTelnet"
-    apiVersion = "1.18"
+    apiVersion = "1.20"
     version = project.version
     description = "Telnet console access plugin."
     authors = ["bekvon", "Madgeek1450", "Prozza", "Taahh", "Telesphoreo"]
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 7454180..41d9927 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 aa991fc..1e2fbf0 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.4.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
index c53aefa..1b6c787 100755
--- a/gradlew
+++ b/gradlew
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015-2021 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -32,10 +32,10 @@
 #       Busybox and similar reduced shells will NOT work, because this script
 #       requires all of these POSIX shell features:
 #         * functions;
-#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
-#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
-#         * compound commands having a testable exit status, especially «case»;
-#         * various built-in commands including «command», «set», and «ulimit».
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
 #
 #   Important for patching:
 #
diff --git a/settings.gradle b/settings.gradle
index 5e44f85..8a01f58 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1,9 +1,6 @@
 pluginManagement {
     repositories {
         gradlePluginPortal()
-        maven {
-            url = uri("https://nexus.telesphoreo.me/repository/gradle-plugins/")
-        }
     }
 }
-rootProject.name = 'bukkittelnet'
+rootProject.name = 'BukkitTelnet'
diff --git a/src/main/java/me/totalfreedom/bukkittelnet/PlayerEventListener.java b/src/main/java/me/totalfreedom/bukkittelnet/PlayerEventListener.java
index 09c5414..a2e34bd 100644
--- a/src/main/java/me/totalfreedom/bukkittelnet/PlayerEventListener.java
+++ b/src/main/java/me/totalfreedom/bukkittelnet/PlayerEventListener.java
@@ -5,7 +5,7 @@ import java.util.HashMap;
 import java.util.Map;
 import me.totalfreedom.bukkittelnet.api.TelnetRequestDataTagsEvent;
 import me.totalfreedom.bukkittelnet.api.TelnetRequestUsageEvent;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
diff --git a/src/main/java/me/totalfreedom/bukkittelnet/TelnetLogger.java b/src/main/java/me/totalfreedom/bukkittelnet/TelnetLogger.java
index 47f130c..4f9a74d 100644
--- a/src/main/java/me/totalfreedom/bukkittelnet/TelnetLogger.java
+++ b/src/main/java/me/totalfreedom/bukkittelnet/TelnetLogger.java
@@ -1,7 +1,7 @@
 package me.totalfreedom.bukkittelnet;
 
 import java.util.logging.Logger;
-import org.apache.commons.lang.exception.ExceptionUtils;
+import org.apache.commons.lang3.exception.ExceptionUtils;
 
 public final class TelnetLogger
 {
diff --git a/src/main/java/me/totalfreedom/bukkittelnet/thirdparty/YamlConfig.java b/src/main/java/me/totalfreedom/bukkittelnet/thirdparty/YamlConfig.java
index 91f2de5..3e52243 100644
--- a/src/main/java/me/totalfreedom/bukkittelnet/thirdparty/YamlConfig.java
+++ b/src/main/java/me/totalfreedom/bukkittelnet/thirdparty/YamlConfig.java
@@ -3,7 +3,7 @@ package me.totalfreedom.bukkittelnet.thirdparty;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStreamReader;
-import org.apache.commons.lang.exception.ExceptionUtils;
+import org.apache.commons.lang3.exception.ExceptionUtils;
 import org.apache.logging.log4j.core.util.IOUtils;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.plugin.Plugin;
diff --git a/src/main/resources/config.yml b/src/main/resources/config.yml
index a75d3c8..f1b2ab9 100644
--- a/src/main/resources/config.yml
+++ b/src/main/resources/config.yml
@@ -1,4 +1,4 @@
-# BukkitTelnet v4.8 Configuration File
+# BukkitTelnet v4.9 Configuration File
 
 # Address to listen on, leave blank for all
 address: ''