diff --git a/core/src/main/java/de/erethon/dungeonsxl/dungeon/DDungeon.java b/core/src/main/java/de/erethon/dungeonsxl/dungeon/DDungeon.java
index 670ad765..3df2f2e2 100644
--- a/core/src/main/java/de/erethon/dungeonsxl/dungeon/DDungeon.java
+++ b/core/src/main/java/de/erethon/dungeonsxl/dungeon/DDungeon.java
@@ -125,7 +125,7 @@ public class DDungeon implements Dungeon {
     @Override
     public List<ResourceWorld> getFloors() {
         if (isMultiFloor()) {
-            return getConfig().getFloors();
+            return new ArrayList<>(getConfig().getFloors());
         } else {
             return new ArrayList<>(Arrays.asList(map));
         }
diff --git a/core/src/main/java/de/erethon/dungeonsxl/dungeon/DGame.java b/core/src/main/java/de/erethon/dungeonsxl/dungeon/DGame.java
index 248a24e2..26fdc64f 100644
--- a/core/src/main/java/de/erethon/dungeonsxl/dungeon/DGame.java
+++ b/core/src/main/java/de/erethon/dungeonsxl/dungeon/DGame.java
@@ -140,7 +140,7 @@ public class DGame implements Game {
     public void setDungeon(Dungeon dungeon) {
         this.dungeon = dungeon;
         if (dungeon.isMultiFloor()) {
-            unplayedFloors = new ArrayList<>(dungeon.getFloors());
+            unplayedFloors = dungeon.getFloors();
         }
     }