diff --git a/src/main/java/net/minestom/server/item/ItemStack.java b/src/main/java/net/minestom/server/item/ItemStack.java
index fa5711f75..2b950d9c1 100644
--- a/src/main/java/net/minestom/server/item/ItemStack.java
+++ b/src/main/java/net/minestom/server/item/ItemStack.java
@@ -11,6 +11,7 @@ import org.jetbrains.annotations.Nullable;
 import org.jglrxavpok.hephaistos.nbt.NBTCompound;
 
 import java.util.List;
+import java.util.Objects;
 import java.util.function.Consumer;
 import java.util.function.IntUnaryOperator;
 import java.util.function.UnaryOperator;
@@ -28,17 +29,20 @@ public final class ItemStack implements HoverEventSource<HoverEvent.ShowItem> {
      */
     public static final @NotNull ItemStack AIR = ItemStack.of(Material.AIR);
 
-    private final StackingRule stackingRule = new VanillaStackingRule(64);
+    private final StackingRule stackingRule;
 
     private final Material material;
     private final int amount;
     private final ItemMeta meta;
 
     protected ItemStack(@NotNull Material material, int amount,
-                        @NotNull ItemMeta meta) {
+                        @NotNull ItemMeta meta,
+                        @NotNull StackingRule stackingRule) {
         this.material = material;
         this.amount = amount;
         this.meta = meta;
+        this.stackingRule = Objects.requireNonNullElseGet(stackingRule,
+                () -> new VanillaStackingRule(64));
     }
 
     @Contract(value = "_ -> new", pure = true)
diff --git a/src/main/java/net/minestom/server/item/ItemStackBuilder.java b/src/main/java/net/minestom/server/item/ItemStackBuilder.java
index 5cb6f871b..b6018c932 100644
--- a/src/main/java/net/minestom/server/item/ItemStackBuilder.java
+++ b/src/main/java/net/minestom/server/item/ItemStackBuilder.java
@@ -20,6 +20,8 @@ public class ItemStackBuilder {
     private int amount;
     protected ItemMetaBuilder metaBuilder;
 
+    private StackingRule stackingRule;
+
     protected ItemStackBuilder(@NotNull Material material, @NotNull ItemMetaBuilder metaBuilder) {
         this.material = material;
         this.amount = 1;
@@ -97,12 +99,18 @@ public class ItemStackBuilder {
         return this;
     }
 
+    @Contract(value = "_ -> this")
+    public @NotNull ItemStackBuilder stackingRule(@Nullable StackingRule stackingRule) {
+        this.stackingRule = stackingRule;
+        return this;
+    }
+
     @Contract(value = "-> new", pure = true)
     public @NotNull ItemStack build() {
         if (amount <= 0)
             return ItemStack.AIR;
 
-        return new ItemStack(material, amount, metaBuilder.build());
+        return new ItemStack(material, amount, metaBuilder.build(), stackingRule);
     }
 
     private static final class DefaultMeta extends ItemMetaBuilder {