diff --git a/app/src/main/java/com/example/tampopo_client/models/FriendRequest.java b/app/src/main/java/com/example/tampopo_client/models/FriendRequest.java
index 939f0b7..4f8f14b 100644
--- a/app/src/main/java/com/example/tampopo_client/models/FriendRequest.java
+++ b/app/src/main/java/com/example/tampopo_client/models/FriendRequest.java
@@ -5,6 +5,9 @@
     private String senderId;
     private String receiverId;
 
+    public FriendRequest(){
+        //デフォルトコンストラクタを追加しました
+    }
     public FriendRequest(String senderId, String receiverId) {
         this.senderId = senderId;
         this.receiverId = receiverId;