diff --git a/core/src/main/java/de/erethon/dungeonsxl/sign/windup/DelayedPowerTask.java b/core/src/main/java/de/erethon/dungeonsxl/sign/windup/DelayedPowerTask.java
index 60f676e2..1c0e78bc 100644
--- a/core/src/main/java/de/erethon/dungeonsxl/sign/windup/DelayedPowerTask.java
+++ b/core/src/main/java/de/erethon/dungeonsxl/sign/windup/DelayedPowerTask.java
@@ -16,7 +16,7 @@
  */
 package de.erethon.dungeonsxl.sign.windup;
 
-import de.erethon.dungeonsxl.api.DungeonsAPI;
+import org.bukkit.Bukkit;
 import org.bukkit.scheduler.BukkitRunnable;
 
 /**
@@ -24,19 +24,19 @@ import org.bukkit.scheduler.BukkitRunnable;
  */
 public class DelayedPowerTask extends BukkitRunnable {
 
-    private DungeonsAPI api;
-
+    private String worldName;
     private RedstoneSign sign;
     private boolean enable;
 
-    public DelayedPowerTask(DungeonsAPI api, RedstoneSign sign, boolean enable) {
+    public DelayedPowerTask(RedstoneSign sign, boolean enable) {
+        worldName = sign.getSign().getWorld().getName();
         this.sign = sign;
         this.enable = enable;
     }
 
     @Override
     public void run() {
-        if (api.getGameWorld(sign.getSign().getWorld()) != null) {
+        if (Bukkit.getWorld(worldName) == null) {
             sign.getEnableTask().cancel();
             sign.getDisableTask().cancel();
             return;
diff --git a/core/src/main/java/de/erethon/dungeonsxl/sign/windup/RedstoneSign.java b/core/src/main/java/de/erethon/dungeonsxl/sign/windup/RedstoneSign.java
index 0447baba..e660be08 100644
--- a/core/src/main/java/de/erethon/dungeonsxl/sign/windup/RedstoneSign.java
+++ b/core/src/main/java/de/erethon/dungeonsxl/sign/windup/RedstoneSign.java
@@ -156,11 +156,11 @@ public class RedstoneSign extends Rocker {
         }
 
         if (delay > 0) {
-            enableTask = new DelayedPowerTask(api, this, true).runTaskTimer(api, delay, delay + offDelay);
+            enableTask = new DelayedPowerTask(this, true).runTaskTimer(api, delay, delay + offDelay);
 
             if (repeat != 1) {
                 repeatsToDo = repeat;
-                disableTask = new DelayedPowerTask(api, this, false).runTaskTimer(api, delay + offDelay, delay + offDelay);
+                disableTask = new DelayedPowerTask(this, false).runTaskTimer(api, delay + offDelay, delay + offDelay);
             }
 
         } else {