diff --git a/common/src/main/java/com/hibiscusmc/hmccosmetics/cosmetic/types/CosmeticBackpackType.java b/common/src/main/java/com/hibiscusmc/hmccosmetics/cosmetic/types/CosmeticBackpackType.java
index ecebc513..9362bd73 100644
--- a/common/src/main/java/com/hibiscusmc/hmccosmetics/cosmetic/types/CosmeticBackpackType.java
+++ b/common/src/main/java/com/hibiscusmc/hmccosmetics/cosmetic/types/CosmeticBackpackType.java
@@ -18,6 +18,7 @@ import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.EquipmentSlot;
 import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;