diff --git a/src/main/java/com/ntlab/irisserver/resources/GameRest.java b/src/main/java/com/ntlab/irisserver/resources/GameRest.java
index 67a4fb8..03c3544 100644
--- a/src/main/java/com/ntlab/irisserver/resources/GameRest.java
+++ b/src/main/java/com/ntlab/irisserver/resources/GameRest.java
@@ -8,6 +8,8 @@
 import javax.ws.rs.GET;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
 import java.util.List;
 
 @Component
@@ -15,6 +17,7 @@
 public class GameRest {
     @GET
     @Path("/{rid}/game/map")
+    @Produces(MediaType.APPLICATION_JSON)
     public List<Integer> getMap(@PathParam("rid") String rid){
         RoomManager rm = RoomManager.getInstance();
         Room room = rm.getRoom(rid);
@@ -25,6 +28,7 @@
 
     @GET
     @Path("/{rid}/game/color")
+    @Produces(MediaType.APPLICATION_JSON)
     public List<String> getColor(@PathParam("rid") String rid){
         RoomManager rm = RoomManager.getInstance();
         Room room = rm.getRoom(rid);