diff --git a/core/src/main/java/de/erethon/dungeonsxl/sign/rocker/OpenDoorSign.java b/core/src/main/java/de/erethon/dungeonsxl/sign/rocker/OpenDoorSign.java
index a49a70fe..c4e911c2 100644
--- a/core/src/main/java/de/erethon/dungeonsxl/sign/rocker/OpenDoorSign.java
+++ b/core/src/main/java/de/erethon/dungeonsxl/sign/rocker/OpenDoorSign.java
@@ -77,22 +77,10 @@ public class OpenDoorSign extends Rocker {
         return true;
     }
 
-    @Deprecated
-    public static final java.util.Set<org.bukkit.Material> FENCE_GATES = new java.util.HashSet<>(6);
-
-    static {
-        FENCE_GATES.add(de.erethon.caliburn.item.VanillaItem.OAK_FENCE_GATE.getMaterial());
-        FENCE_GATES.add(de.erethon.caliburn.item.VanillaItem.ACACIA_FENCE_GATE.getMaterial());
-        FENCE_GATES.add(de.erethon.caliburn.item.VanillaItem.DARK_OAK_FENCE_GATE.getMaterial());
-        FENCE_GATES.add(de.erethon.caliburn.item.VanillaItem.SPRUCE_FENCE_GATE.getMaterial());
-        FENCE_GATES.add(de.erethon.caliburn.item.VanillaItem.BIRCH_FENCE_GATE.getMaterial());
-        FENCE_GATES.add(de.erethon.caliburn.item.VanillaItem.JUNGLE_FENCE_GATE.getMaterial());
-    }
-
     @Override
     public void initialize() {
         Block block = BlockUtil.getAttachedBlock(getSign().getBlock());
-        if (Category.DOORS.containsBlock(block) || FENCE_GATES.contains(block.getType()) || Category.TRAPDOORS.containsBlock(block)) {
+        if (Category.DOORS.containsBlock(block) || Category.FENCE_GATES.containsBlock(block) || Category.TRAPDOORS.containsBlock(block)) {
             if (block.getRelative(BlockFace.DOWN).getType() == block.getType()) {
                 door = new LockedDoor(api, block.getRelative(BlockFace.DOWN));
             } else {