diff --git a/src/main/java/org/ntlab/acanthus_server/resources/accounts/WorkRest.java b/src/main/java/org/ntlab/acanthus_server/resources/accounts/WorkRest.java
index d79d1c8..49a6c32 100644
--- a/src/main/java/org/ntlab/acanthus_server/resources/accounts/WorkRest.java
+++ b/src/main/java/org/ntlab/acanthus_server/resources/accounts/WorkRest.java
@@ -9,6 +9,7 @@
 import javax.ws.rs.*;
 import javax.ws.rs.core.MediaType;
 import java.util.ArrayList;
+import java.util.Collection;
 
 @Component
 @Path("/accounts")
@@ -27,7 +28,7 @@
 
         if(account != null && account.getToken().equals(token)){
             //指定ユーザーの制作作品の表示
-            ArrayList<Work> workList = account.getWorkingList();
+            Collection<Work> workList = account.getWorkingList().values();
             return new WorkJson(workList);
         }else{
             //ユーザーID、トークンが間違っている時のレスポンス