diff --git a/src/main/java/com/ntlab/irisserver/entities/Card.java b/src/main/java/com/ntlab/irisserver/entities/Card.java
index ab9160b..9f91e99 100644
--- a/src/main/java/com/ntlab/irisserver/entities/Card.java
+++ b/src/main/java/com/ntlab/irisserver/entities/Card.java
@@ -13,6 +13,11 @@
     @JsonProperty("dno")
     private int dno;
 
+    public Card(){
+        isOpen=false;
+    }
+
+
     public void setIsOpen(boolean isOpen) {this.isOpen = isOpen;}
 
     public void setColor(String color) {this.color = color;}