diff --git a/src/loaders/lottie/tvgLottieExpressions.cpp b/src/loaders/lottie/tvgLottieExpressions.cpp
index c83961c1..5d48c3f3 100644
--- a/src/loaders/lottie/tvgLottieExpressions.cpp
+++ b/src/loaders/lottie/tvgLottieExpressions.cpp
@@ -1355,7 +1355,7 @@ jerry_value_t LottieExpressions::evaluate(float frameNo, LottieExpression* exp)
     //evaluate the code
     auto eval = jerry_eval((jerry_char_t *) exp->code, strlen(exp->code), JERRY_PARSE_NO_OPTS);
 
-    if (jerry_value_is_exception(eval) || jerry_value_is_undefined(eval)) {
+    if (jerry_value_is_exception(eval)) {
         TVGERR("LOTTIE", "Failed to dispatch the expressions!");
         exp->disabled = true;
         return jerry_undefined();
diff --git a/src/loaders/lottie/tvgLottieModel.h b/src/loaders/lottie/tvgLottieModel.h
index e8837aac..934ecfb1 100644
--- a/src/loaders/lottie/tvgLottieModel.h
+++ b/src/loaders/lottie/tvgLottieModel.h
@@ -934,6 +934,9 @@ struct LottieSlot
     Array<Pair> pairs;
     LottieProperty::Type type;
     bool overridden = false;
+
+    // used for expression
+    LottieLayer* layer = nullptr;
 };
 
 
diff --git a/src/loaders/lottie/tvgLottieParser.cpp b/src/loaders/lottie/tvgLottieParser.cpp
index 6e5f5380..05b06b52 100644
--- a/src/loaders/lottie/tvgLottieParser.cpp
+++ b/src/loaders/lottie/tvgLottieParser.cpp
@@ -466,7 +466,10 @@ void LottieParser::registerSlot(LottieObject* obj, const char* sid)
         (*p)->pairs.push({obj});
         return;
     }
-    comp->slots.push(new LottieSlot(strdup(sid), obj, type));
+    
+    auto slot = new LottieSlot(strdup(sid), obj, type);
+    slot->layer = context.layer;
+    comp->slots.push(slot);
 }
 
 
@@ -1497,6 +1500,7 @@ bool LottieParser::apply(LottieSlot* slot, bool byDefault)
 
     //OPTIMIZE: we can create the property directly, without object
     LottieObject* obj = nullptr;  //slot object
+    context.layer = slot->layer;
 
     switch (slot->type) {
         case LottieProperty::Type::Position: {
@@ -1562,7 +1566,7 @@ bool LottieParser::apply(LottieSlot* slot, bool byDefault)
 
     slot->assign(obj, byDefault);
 
-    delete(obj);
+    // delete(obj); // 여기서 expression을 위한 property가 free 됨 (수정필요)
 
     return true;
 }
diff --git a/src/loaders/lottie/tvgLottieProperty.h b/src/loaders/lottie/tvgLottieProperty.h
index 1c49ff7b..763c5535 100644
--- a/src/loaders/lottie/tvgLottieProperty.h
+++ b/src/loaders/lottie/tvgLottieProperty.h
@@ -365,6 +365,12 @@ struct LottieGenericProperty : LottieProperty
                 *frames = *rhs.frames;
             }
         } else value = rhs.value;
+
+        // TODO: 슬롯 데이터 이전 로직에 expression에 대한 정보 추가 필요
+        if (rhs.exp) {
+            exp = rhs.exp;
+            const_cast<LottieGenericProperty<Frame, Value, Scalar>&>(rhs).exp = nullptr;
+        }
     }
 
     float angle(float frameNo)