diff --git a/src/main/java/city/norain/slimefun4/compatibillty/VersionedAttribute.java b/src/main/java/city/norain/slimefun4/compatibillty/VersionedAttribute.java
new file mode 100644
index 0000000000..c4f5ad7bcd
--- /dev/null
+++ b/src/main/java/city/norain/slimefun4/compatibillty/VersionedAttribute.java
@@ -0,0 +1,16 @@
+package city.norain.slimefun4.compatibillty;
+
+import city.norain.slimefun4.SlimefunExtended;
+import lombok.experimental.UtilityClass;
+import org.bukkit.attribute.Attribute;
+
+@UtilityClass
+public class VersionedAttribute {
+    public static Attribute getMaxHealth() {
+        if (SlimefunExtended.getMinecraftVersion().isAtLeast(1, 21, 3)) {
+            return Attribute.valueOf("MAX_HEALTH");
+        } else {
+            return Attribute.valueOf("GENERIC_MAX_HEALTH");
+        }
+    }
+}
diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/medical/Bandage.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/medical/Bandage.java
index 38a68b5cd2..95b9d2b329 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/medical/Bandage.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/medical/Bandage.java
@@ -1,5 +1,6 @@
 package io.github.thebusybiscuit.slimefun4.implementation.items.medical;
 
+import city.norain.slimefun4.compatibillty.VersionedAttribute;
 import io.github.bakedlibs.dough.items.ItemUtils;
 import io.github.thebusybiscuit.slimefun4.api.items.ItemGroup;
 import io.github.thebusybiscuit.slimefun4.api.items.SlimefunItemStack;
@@ -11,7 +12,6 @@
 import org.bukkit.Effect;
 import org.bukkit.GameMode;
 import org.bukkit.Material;
-import org.bukkit.attribute.Attribute;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.potion.PotionEffect;
@@ -45,7 +45,8 @@ public ItemUseHandler getItemHandler() {
             // Player is neither burning nor injured
             if (p.getFireTicks() <= 0
                 && p.getHealth()
-                   >= p.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue()) {
+                   >= p.getAttribute(VersionedAttribute.getMaxHealth()).getValue()) {
+
                 return;
             }
 
diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/medical/MedicalSupply.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/medical/MedicalSupply.java
index 347d82f01e..745f2774ea 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/medical/MedicalSupply.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/medical/MedicalSupply.java
@@ -1,5 +1,6 @@
 package io.github.thebusybiscuit.slimefun4.implementation.items.medical;
 
+import city.norain.slimefun4.compatibillty.VersionedAttribute;
 import io.github.thebusybiscuit.slimefun4.api.items.ItemGroup;
 import io.github.thebusybiscuit.slimefun4.api.items.ItemHandler;
 import io.github.thebusybiscuit.slimefun4.api.items.SlimefunItemStack;
@@ -11,7 +12,6 @@
 import java.util.Set;
 
 import lombok.Getter;
-import org.bukkit.attribute.Attribute;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.potion.PotionEffect;
@@ -41,8 +41,7 @@ protected MedicalSupply(
     /**
      * This method clears any negative {@link PotionEffect} from the given {@link LivingEntity}.
      *
-     * @param n
-     *            The {@link LivingEntity} to clear the effects from.
+     * @param n The {@link LivingEntity} to clear the effects from.
      */
     public void clearNegativeEffects(LivingEntity n) {
         for (PotionEffectType effect : curedEffects) {
@@ -55,12 +54,11 @@ public void clearNegativeEffects(LivingEntity n) {
     /**
      * This method heals the given {@link LivingEntity} by the amount provided via the constructor.
      *
-     * @param n
-     *            The {@link LivingEntity} to heal
+     * @param n The {@link LivingEntity} to heal
      */
     public void heal(LivingEntity n) {
         double health = n.getHealth() + healAmount;
-        double maxHealth = n.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue();
+        double maxHealth = n.getAttribute(VersionedAttribute.getMaxHealth()).getValue();
         n.setHealth(Math.min(health, maxHealth));
     }
 }
diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/medical/Splint.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/medical/Splint.java
index e9a3b45d74..ba64892df6 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/medical/Splint.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/medical/Splint.java
@@ -1,5 +1,6 @@
 package io.github.thebusybiscuit.slimefun4.implementation.items.medical;
 
+import city.norain.slimefun4.compatibillty.VersionedAttribute;
 import io.github.bakedlibs.dough.items.ItemUtils;
 import io.github.thebusybiscuit.slimefun4.api.items.ItemGroup;
 import io.github.thebusybiscuit.slimefun4.api.items.SlimefunItemStack;
@@ -10,7 +11,6 @@
 
 import io.github.thebusybiscuit.slimefun4.utils.compatibility.VersionedPotionEffectType;
 import org.bukkit.GameMode;
-import org.bukkit.attribute.Attribute;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.potion.PotionEffect;
@@ -33,7 +33,7 @@ public ItemUseHandler getItemHandler() {
             // Player is neither burning nor injured
             if (p.getFireTicks() <= 0
                 && p.getHealth()
-                   >= p.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue()) {
+                   >= p.getAttribute(VersionedAttribute.getMaxHealth()).getValue()) {
                 return;
             }
 
diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/weapons/VampireBlade.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/weapons/VampireBlade.java
index 60c390e7b1..9d7b8e095d 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/weapons/VampireBlade.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/weapons/VampireBlade.java
@@ -1,5 +1,6 @@
 package io.github.thebusybiscuit.slimefun4.implementation.items.weapons;
 
+import city.norain.slimefun4.compatibillty.VersionedAttribute;
 import io.github.thebusybiscuit.slimefun4.api.items.ItemGroup;
 import io.github.thebusybiscuit.slimefun4.api.items.ItemSetting;
 import io.github.thebusybiscuit.slimefun4.api.items.SlimefunItemStack;
@@ -8,9 +9,9 @@
 import io.github.thebusybiscuit.slimefun4.core.handlers.WeaponUseHandler;
 import io.github.thebusybiscuit.slimefun4.core.services.sounds.SoundEffect;
 import io.github.thebusybiscuit.slimefun4.implementation.items.SimpleSlimefunItem;
+
 import java.util.concurrent.ThreadLocalRandom;
 
-import org.bukkit.attribute.Attribute;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
@@ -20,7 +21,6 @@
  * who damages another {@link LivingEntity} with this sword.
  *
  * @author TheBusyBiscuit
- *
  */
 public class VampireBlade extends SimpleSlimefunItem<WeaponUseHandler> {
     private static final double HEALING_AMOUNT = 4.0;
@@ -39,7 +39,8 @@ public WeaponUseHandler getItemHandler() {
             if (ThreadLocalRandom.current().nextInt(100) < getChance()) {
                 SoundEffect.VAMPIRE_BLADE_HEALING_SOUND.playFor(p);
                 double health = p.getHealth() + HEALING_AMOUNT;
-                double maxHealth = p.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue();
+                double maxHealth =
+                        p.getAttribute(VersionedAttribute.getMaxHealth()).getValue();
                 p.setHealth(Math.min(health, maxHealth));
             }
         };
diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/utils/biomes/BiomeMap.java b/src/main/java/io/github/thebusybiscuit/slimefun4/utils/biomes/BiomeMap.java
index 8c4b762653..bdb11193e9 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/utils/biomes/BiomeMap.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/utils/biomes/BiomeMap.java
@@ -8,6 +8,7 @@
 import java.io.InputStreamReader;
 import java.nio.charset.StandardCharsets;
 import java.util.EnumMap;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.stream.Collectors;
 import javax.annotation.Nullable;
diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/utils/biomes/BiomeMapParser.java b/src/main/java/io/github/thebusybiscuit/slimefun4/utils/biomes/BiomeMapParser.java
index 31bf85f2c9..299889627a 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/utils/biomes/BiomeMapParser.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/utils/biomes/BiomeMapParser.java
@@ -8,11 +8,8 @@
 import io.github.thebusybiscuit.slimefun4.api.exceptions.BiomeMapException;
 import io.github.thebusybiscuit.slimefun4.utils.JsonUtils;
 import io.github.thebusybiscuit.slimefun4.utils.PatternUtils;
-import java.util.EnumMap;
-import java.util.EnumSet;
-import java.util.Locale;
-import java.util.Map;
-import java.util.Set;
+
+import java.util.*;
 
 import org.bukkit.NamespacedKey;
 import org.bukkit.block.Biome;