diff --git a/pom.xml b/pom.xml
index 122bbd3..119858c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -50,7 +50,7 @@
 		</repository>
 		<repository>
 			<id>spigot-repo</id>
-			<url>http://repo.mvdw-software.be/content/groups/public/<!--https://hub.spigotmc.org/nexus/content/groups/public/--></url>
+			<url>https://hub.spigotmc.org/nexus/content/groups/public/</url>
 		</repository>
 		<repository>
 			<id>vault-repo</id>
@@ -60,6 +60,10 @@
 			<id>sk89q-repo</id>
 			<url>http://maven.sk89q.com/repo/</url>
 		</repository>
+		<repository>
+			<id>jitpack.io</id>
+			<url>https://jitpack.io</url>
+		</repository>
 		<repository>
 			<id>dre2n-rpo</id>
 			<url>http://erethon.de/repo/</url>
@@ -70,7 +74,7 @@
 		<dependency>
 			<groupId>org.bukkit</groupId>
 			<artifactId>bukkit</artifactId>
-			<version>18w03b-R0.1-SNAPSHOT<!--1.12.2--></version>
+			<version>1.13-R0.1-SNAPSHOT</version>
 			<scope>provided</scope>
 		</dependency>
 		<dependency>
@@ -92,7 +96,7 @@
 			<scope>provided</scope>
 		</dependency>
 		<dependency>
-			<groupId>me.ryanhamshire</groupId>
+			<groupId>com.github.TechFortress</groupId>
 			<artifactId>GriefPrevention</artifactId>
 			<version>16.8</version>
 			<scope>provided</scope>
diff --git a/resources/plugin.yml b/resources/plugin.yml
index 3e3bd01..25d1d21 100644
--- a/resources/plugin.yml
+++ b/resources/plugin.yml
@@ -1,8 +1,9 @@
 name: ${project.name}
 version: ${project.version}
 main: com.dre.brewery.P
-authors: [Milan Albrecht, Frank Baumann, ProgrammerDan]
+authors: [Milan Albrecht, Frank Baumann, ProgrammerDan, Daniel Saukel]
 softdepend: [LWC, LogBlock, WorldGuard, GriefPrevention, Vault]
+#api-version: 1.13
 commands:
   brewery:
     description: Command for Administration
diff --git a/src/com/dre/brewery/BCauldron.java b/src/com/dre/brewery/BCauldron.java
index 5d985b0..359295f 100644
--- a/src/com/dre/brewery/BCauldron.java
+++ b/src/com/dre/brewery/BCauldron.java
@@ -9,8 +9,6 @@ import org.bukkit.block.BlockFace;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.Effect;
 import org.bukkit.configuration.ConfigurationSection;
-import org.bukkit.material.Cauldron;
-import org.bukkit.material.MaterialData;
 
 public class BCauldron {
 	public static CopyOnWriteArrayList<BCauldron> bcauldrons = new CopyOnWriteArrayList<>();
@@ -36,8 +34,7 @@ public class BCauldron {
 
 	public void onUpdate() {
 		// Check if fire still alive
-		if (!block.getChunk().isLoaded() || block.getRelative(BlockFace.DOWN).getType() == Material.FIRE || block.getRelative(BlockFace.DOWN).getType() == LegacyUtil.LAVA
-				|| block.getRelative(BlockFace.DOWN).getType() == Material.LAVA) {
+		if (!block.getChunk().isLoaded() || block.getRelative(BlockFace.DOWN).getType() == Material.FIRE || LegacyUtil.isLava(block.getRelative(BlockFace.DOWN).getType())) {
 			// add a minute to cooking time
 			state++;
 			if (someRemoved) {
@@ -74,7 +71,7 @@ public class BCauldron {
 	// get cauldron from block and add given ingredient
 	public static boolean ingredientAdd(Block block, ItemStack ingredient) {
 		// if not empty
-		if (getFillLevel(block) != 0) {
+		if (LegacyUtil.getFillLevel(block) != 0) {
 			BCauldron bcauldron = get(block);
 			if (bcauldron != null) {
 				bcauldron.add(ingredient);
@@ -125,24 +122,6 @@ public class BCauldron {
 		return false;
 	}
 
-	// 0 = empty, 1 = something in, 2 = full
-	public static byte getFillLevel(Block block) {
-		if (block.getType() == Material.CAULDRON) {
-			MaterialData data = block.getState().getData();
-			if (data instanceof Cauldron) {
-				Cauldron cauldron = (Cauldron) data;
-				if (cauldron.isEmpty()) {
-					return 0;
-				} else if (cauldron.isFull()) {
-					return 2;
-				} else {
-					return 1;
-				}
-			}
-		}
-		return 0;
-	}
-
 	// prints the current cooking time to the player
 	public static void printTime(Player player, Block block) {
 		if (!player.hasPermission("brewery.cauldron.time")) {
@@ -161,7 +140,7 @@ public class BCauldron {
 
 	// reset to normal cauldron
 	public static void remove(Block block) {
-		if (getFillLevel(block) != 0) {
+		if (LegacyUtil.getFillLevel(block) != 0) {
 			BCauldron bcauldron = get(block);
 			if (bcauldron != null) {
 				bcauldrons.remove(bcauldron);
diff --git a/src/com/dre/brewery/Barrel.java b/src/com/dre/brewery/Barrel.java
index e32aa6e..4ee0f47 100644
--- a/src/com/dre/brewery/Barrel.java
+++ b/src/com/dre/brewery/Barrel.java
@@ -5,7 +5,6 @@ import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.Map;
 
 import org.bukkit.Material;
-import org.bukkit.TreeSpecies;
 import org.bukkit.entity.HumanEntity;
 import org.bukkit.entity.Player;
 import org.bukkit.block.Block;
@@ -15,10 +14,6 @@ import org.bukkit.inventory.InventoryHolder;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.PotionMeta;
 import org.bukkit.configuration.ConfigurationSection;
-import org.bukkit.material.MaterialData;
-import org.bukkit.material.Stairs;
-import org.bukkit.material.Tree;
-import org.bukkit.material.Wood;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.scheduler.BukkitRunnable;
 
@@ -612,50 +607,7 @@ public class Barrel implements InventoryHolder {
 			default:
 				wood = spigot.getRelative(0, 0, -1);
 		}
-
-		Material type = wood.getType();
-		if (LegacyUtil.isWoodPlanks(type)) {
-			MaterialData data = wood.getState().getData();
-			TreeSpecies woodType;
-			if (data instanceof Tree) {
-				woodType = ((Tree) data).getSpecies();
-			} else if (data instanceof Wood) {
-				woodType = ((Wood) data).getSpecies();
-			} else {
-				return 0;
-			}
-
-                        switch (woodType) {
-				case GENERIC:
-					return 2;
-				case REDWOOD:
-					return 4;
-				case BIRCH:
-					return 1;
-				case JUNGLE:
-					return 3;
-				case ACACIA:
-					return 5;
-				case DARK_OAK:
-					return 6;
-				default:
-					return 0;
-			}
-		} else if (type == LegacyUtil.OAK_STAIRS) {
-			return 2;
-		} else if (type == LegacyUtil.SPRUCE_STAIRS) {
-			return 4;
-		} else if (type == LegacyUtil.BIRCH_STAIRS) {
-			return 1;
-		} else if (type == LegacyUtil.JUNGLE_STAIRS) {
-			return 3;
-		} else if (type == LegacyUtil.ACACIA_STAIRS) {
-			return 5;
-		} else if (type == LegacyUtil.DARK_OAK_STAIRS) {
-			return 6;
-		} else {
-			return 0;
-		}
+		return LegacyUtil.getWoodType(wood);
 	}
 
 	// returns the Sign of a large barrel, the spigot if there is none
@@ -751,11 +703,8 @@ public class Barrel implements InventoryHolder {
 					if (LegacyUtil.isWoodStairs(type)) {
 						if (y == 0) {
 							// stairs have to be upside down
-							MaterialData data = block.getState().getData();
-							if (data instanceof Stairs) {
-								if (!((Stairs) data).isInverted()) {
-									return block;
-								}
+							if (!LegacyUtil.areStairsInverted(block)) {
+								return block;
 							}
 						}
 						stairs.add(block.getX());
diff --git a/src/com/dre/brewery/LegacyUtil.java b/src/com/dre/brewery/LegacyUtil.java
index 54bd9f5..3857e2e 100644
--- a/src/com/dre/brewery/LegacyUtil.java
+++ b/src/com/dre/brewery/LegacyUtil.java
@@ -4,7 +4,15 @@ import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import org.bukkit.Location;
 import org.bukkit.Material;
+import org.bukkit.TreeSpecies;
 import org.bukkit.World;
+import org.bukkit.block.Block;
+import org.bukkit.block.data.BlockData;
+import org.bukkit.block.data.Levelled;
+import org.bukkit.material.Cauldron;
+import org.bukkit.material.MaterialData;
+import org.bukkit.material.Tree;
+import org.bukkit.material.Wood;
 
 public class LegacyUtil {
 
@@ -19,8 +27,6 @@ public class LegacyUtil {
         }
     }
 
-    public static final Material FLOWING_LAVA = get("FLOWING_LAVA", "LAVA");
-    public static final Material LAVA = get("LAVA", "STATIONARY_LAVA");
     public static final Material CLOCK = get("CLOCK", "WATCH");
     public static final Material OAK_STAIRS = get("OAK_STAIRS", "WOOD_STAIRS");
     public static final Material SPRUCE_STAIRS = get("SPRUCE_STAIRS", "SPRUCE_WOOD_STAIRS");
@@ -54,14 +60,105 @@ public class LegacyUtil {
                 || (type == ACACIA_STAIRS && ACACIA_STAIRS != null) || (type == DARK_OAK_STAIRS && DARK_OAK_STAIRS != null);
     }
 
-    public static boolean isFence(Material material) {
-        return material.name().endsWith("FENCE");
+    public static boolean isFence(Material type) {
+        return type.name().endsWith("FENCE");
     }
 
     public static boolean isSign(Material type) {
         return type.name().equals("SIGN_POST") || type == Material.SIGN || type == Material.WALL_SIGN;
     }
 
+    // LAVA and STATIONARY_LAVA are merged as of 1.13
+    public static boolean isLava(Material type) {
+        return type.name().equals("STATIONARY_LAVA") || type == Material.LAVA;
+    }
+
+    public static boolean areStairsInverted(Block block) {
+        if (P.use1_13) {
+            MaterialData data = block.getState().getData();
+            return data instanceof org.bukkit.material.Stairs && (((org.bukkit.material.Stairs) data).isInverted());
+        } else {
+            BlockData data = block.getBlockData();
+            return data instanceof org.bukkit.block.data.type.Stairs && ((org.bukkit.block.data.type.Stairs) data).getHalf() == org.bukkit.block.data.type.Stairs.Half.TOP;
+        }
+    }
+
+    public static byte getWoodType(Block wood) {
+        TreeSpecies woodType = null;
+
+        if (P.use1_13 || isWoodStairs(wood.getType())) {
+            String material = wood.getType().name();
+            if (material.startsWith("OAK")) {
+                woodType = TreeSpecies.GENERIC;
+            } else if (material.startsWith("SPRUCE")) {
+                woodType = TreeSpecies.REDWOOD;
+            } else if (material.startsWith("BIRCH")) {
+                woodType = TreeSpecies.BIRCH;
+            } else if (material.startsWith("JUNGLE")) {
+                woodType = TreeSpecies.JUNGLE;
+            } else if (material.startsWith("ACACIA")) {
+                woodType = TreeSpecies.ACACIA;
+            } else if (material.startsWith("DARK_OAK")) {
+                woodType = TreeSpecies.DARK_OAK;
+            }
+
+        } else {
+            MaterialData data = wood.getState().getData();
+            if (data instanceof Tree) {
+                woodType = ((Tree) data).getSpecies();
+            } else if (data instanceof Wood) {
+                woodType = ((Wood) data).getSpecies();
+            } else {
+                return 0;
+            }
+        }
+
+        switch (woodType) {
+            case GENERIC:
+                return 2;
+            case REDWOOD:
+                return 4;
+            case BIRCH:
+                return 1;
+            case JUNGLE:
+                return 3;
+            case ACACIA:
+                return 5;
+            case DARK_OAK:
+                return 6;
+            default:
+                return 0;
+        }
+    }
+
+    // 0 = empty, 1 = something in, 2 = full
+    public static byte getFillLevel(Block block) {
+        if (block.getType() != Material.CAULDRON) {
+            return 0;
+        }
+
+        if (P.use1_13) {
+            Levelled cauldron = ((Levelled) block);
+            if (cauldron.getLevel() == 0) {
+                return 0;
+            } else if (cauldron.getLevel() == cauldron.getMaximumLevel()) {
+                return 2;
+            } else {
+                return 1;
+            }
+
+        } else {
+            Cauldron cauldron = (Cauldron) block.getState().getData();
+            if (cauldron.isEmpty()) {
+                return 0;
+            } else if (cauldron.isFull()) {
+                return 2;
+            } else {
+                return 1;
+            }
+        }
+    }
+
     public static Material getMaterial(int id) {
         try {
             return GET_MATERIAL != null ? (Material) GET_MATERIAL.invoke(null, id) : null;
diff --git a/src/com/dre/brewery/listeners/PlayerListener.java b/src/com/dre/brewery/listeners/PlayerListener.java
index 457333c..6623fcd 100644
--- a/src/com/dre/brewery/listeners/PlayerListener.java
+++ b/src/com/dre/brewery/listeners/PlayerListener.java
@@ -67,18 +67,17 @@ public class PlayerListener implements Listener {
 							// reset cauldron when refilling to prevent unlimited source of potions
 						} else if (materialInHand == Material.WATER_BUCKET) {
 							if (!P.use1_9) {
-								if (BCauldron.getFillLevel(clickedBlock) != 0 && BCauldron.getFillLevel(clickedBlock) < 2) {
+								if (LegacyUtil.getFillLevel(clickedBlock) == 1) {
 									// will only remove when existing
 									BCauldron.remove(clickedBlock);
 								}
 							}
 							return;
-
 						}
 
 						// Check if fire alive below cauldron when adding ingredients
 						Block down = clickedBlock.getRelative(BlockFace.DOWN);
-						if (down.getType() == Material.FIRE || down.getType() == LegacyUtil.LAVA || down.getType() == LegacyUtil.FLOWING_LAVA) {
+						if (down.getType() == Material.FIRE || LegacyUtil.isLava(down.getType())) {
 
 							event.setCancelled(true);
 							boolean handSwap = false;