diff --git a/build.gradle b/build.gradle
index f98df3c..57e67d9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -27,6 +27,18 @@ plugins {
     id 'com.github.johnrengelman.shadow' version '5.0.0'
 }
 
+ext.swdep = { s ->
+    if (file("${rootDir}/lib/${s}.jar").exists()) {
+        return files("${rootDir}/lib/${s}.jar")
+    } else {
+        if (s.contains("-")) {
+            return "de.steamwar:${s.toLowerCase().replace('-', ':')}"
+        } else {
+            return "de.steamwar:${s.toLowerCase()}:RELEASE"
+        }
+    }
+}
+
 group 'de.steamwar'
 version ''
 
@@ -71,12 +83,20 @@ sourceSets {
 
 repositories {
     mavenCentral()
+
+    maven {
+        url = uri('https://steamwar.de/maven/')
+        credentials {
+            username = steamwarProperties.getProperty("maven.username")
+            password = steamwarProperties.getProperty("maven.password")
+        }
+    }
 }
 
 dependencies {
-    compileOnly files("${projectDir}/lib/Spigot-1.15.jar")
-    compileOnly files("${projectDir}/lib/WorldEdit-1.15.jar")
-    compileOnly files("${projectDir}/lib/SpigotCore.jar")
+    compileOnly swdep("Spigot-1.15")
+    compileOnly swdep("WorldEdit-1.15")
+    compileOnly swdep("SpigotCore")
 
     compileOnly 'org.projectlombok:lombok:1.18.22'
     testCompileOnly 'org.projectlombok:lombok:1.18.22'
diff --git a/src/de/steamwar/lobby/map/CustomMapCommand.java b/src/de/steamwar/lobby/map/CustomMapCommand.java
index c2d6f6a..9d76bed 100644
--- a/src/de/steamwar/lobby/map/CustomMapCommand.java
+++ b/src/de/steamwar/lobby/map/CustomMapCommand.java
@@ -19,10 +19,9 @@
 
 package de.steamwar.lobby.map;
 
-import de.steamwar.command.GuardChecker;
-import de.steamwar.command.GuardResult;
 import de.steamwar.command.SWCommand;
 import de.steamwar.command.TypeMapper;
+import de.steamwar.command.TypeValidator;
 import de.steamwar.sql.SteamwarUser;
 import de.steamwar.sql.UserGroup;
 import lombok.SneakyThrows;
@@ -41,7 +40,7 @@ public class CustomMapCommand extends SWCommand {
 
     @Register
     @SneakyThrows
-    public void render(@Guard Player p, File file) {
+    public void render(@Validator Player p, File file) {
         if (SteamwarUser.get(p).getUserGroup() != UserGroup.Developer) {
             return;
         }
@@ -52,14 +51,10 @@ public class CustomMapCommand extends SWCommand {
         new CustomMap(p, ImageIO.read(file));
     }
 
-    @ClassGuard(value = Player.class, local = true)
-    public GuardChecker getGuardChecker() {
-        return (commandSender, guardCheckType, strings, s) -> {
-            Player player = (Player) commandSender;
-            if (SteamwarUser.get(player).getUserGroup() == UserGroup.Developer) {
-                return GuardResult.ALLOWED;
-            }
-            return GuardResult.DENIED;
+    @ClassValidator(value = Player.class, local = true)
+    public TypeValidator<Player> getGuardChecker() {
+        return (commandSender, player, messageSender) -> {
+            return SteamwarUser.get(player).getUserGroup() == UserGroup.Developer;
         };
     }