diff --git a/src/Library/Items/Item.cpp b/src/Library/Items/Item.cpp
index dc1501f..5f36675 100644
--- a/src/Library/Items/Item.cpp
+++ b/src/Library/Items/Item.cpp
@@ -7,7 +7,7 @@ namespace CreatureLib::Library {
         BattleItemCategory _battleCategory;
         int32_t _price;
 
-        std::unique_ptr<const SecondaryEffect> _effect = nullptr;
+        ArbUt::OptionalUniquePtr<const SecondaryEffect> _effect = nullptr;
         std::unordered_set<uint32_t> _flags;
 
     public:
@@ -20,7 +20,7 @@ namespace CreatureLib::Library {
         inline ItemCategory GetCategory() const noexcept { return _category; }
         inline BattleItemCategory GetBattleCategory() const noexcept { return _battleCategory; }
         inline int32_t GetPrice() const noexcept { return _price; }
-        inline const std::unique_ptr<const SecondaryEffect>& GetEffect() const noexcept { return _effect; }
+        inline const ArbUt::OptionalUniquePtr<const SecondaryEffect>& GetEffect() const noexcept { return _effect; }
 
         inline bool HasFlag(const ArbUt::BasicStringView& flag) const noexcept { return this->_flags.contains(flag); }
         inline bool HasFlag(uint32_t flag) const noexcept { return this->_flags.contains(flag); }
@@ -34,7 +34,9 @@ namespace CreatureLib::Library {
     ItemCategory Item::GetCategory() const noexcept { return _impl->GetCategory(); }
     BattleItemCategory Item::GetBattleCategory() const noexcept { return _impl->GetBattleCategory(); }
     int32_t Item::GetPrice() const noexcept { return _impl->GetPrice(); }
-    const std::unique_ptr<const SecondaryEffect>& Item::GetEffect() const noexcept { return _impl->GetEffect(); }
+    const ArbUt::OptionalUniquePtr<const SecondaryEffect>& Item::GetEffect() const noexcept {
+        return _impl->GetEffect();
+    }
 
     bool Item::HasFlag(const ArbUt::BasicStringView& flag) const noexcept { return _impl->HasFlag(flag); }
     bool Item::HasFlag(uint32_t flag) const noexcept { return _impl->HasFlag(flag); }
diff --git a/src/Library/Items/Item.hpp b/src/Library/Items/Item.hpp
index 90870bc..e95ccfd 100644
--- a/src/Library/Items/Item.hpp
+++ b/src/Library/Items/Item.hpp
@@ -23,7 +23,7 @@ namespace CreatureLib::Library {
         BattleItemCategory GetBattleCategory() const noexcept;
         int32_t GetPrice() const noexcept;
 
-        const std::unique_ptr<const SecondaryEffect>& GetEffect() const noexcept;
+        const ArbUt::OptionalUniquePtr<const SecondaryEffect>& GetEffect() const noexcept;
         bool HasFlag(const ArbUt::BasicStringView& flag) const noexcept;
         bool HasFlag(uint32_t flag) const noexcept;
     };