diff --git a/src/main/java/org/pongmatcher/domain/Match.java b/src/main/java/org/pongmatcher/domain/Match.java
index 96c3f59..25de200 100644
--- a/src/main/java/org/pongmatcher/domain/Match.java
+++ b/src/main/java/org/pongmatcher/domain/Match.java
@@ -10,13 +10,13 @@
 @Table(name = "`match`")
 public final class Match {
     @Id
-    private volatile String id;
+    private String id;
 
     @JsonProperty("match_request_1_id")
-    private volatile String matchRequest1Id;
+    private String matchRequest1Id;
 
     @JsonProperty("match_request_2_id")
-    private volatile String matchRequest2Id;
+    private String matchRequest2Id;
 
     Match() {
     }
diff --git a/src/main/java/org/pongmatcher/domain/MatchRequest.java b/src/main/java/org/pongmatcher/domain/MatchRequest.java
index 9a1519e..121f165 100644
--- a/src/main/java/org/pongmatcher/domain/MatchRequest.java
+++ b/src/main/java/org/pongmatcher/domain/MatchRequest.java
@@ -9,11 +9,11 @@ public final class MatchRequest {
 
     @GeneratedValue
     @Id
-    private volatile Long id;
+    private Long id;
 
-    private volatile String uuid;
+    private String uuid;
 
-    private volatile String requesterId;
+    private String requesterId;
 
     MatchRequest() {
     }
diff --git a/src/main/java/org/pongmatcher/domain/Result.java b/src/main/java/org/pongmatcher/domain/Result.java
index f5ceb27..33b81ff 100644
--- a/src/main/java/org/pongmatcher/domain/Result.java
+++ b/src/main/java/org/pongmatcher/domain/Result.java
@@ -10,36 +10,37 @@
 public final class Result {
 
     @Id
-    private volatile String id = UUID.randomUUID().toString();
+    private  String id = UUID.randomUUID().toString();
 
-    private volatile String winnerId;
+    @JsonProperty("winner")
+    private  String winnerId;
 
-    private volatile String loserId;
+    @JsonProperty("loser")
+    private  String loserId;
 
-    private volatile String matchId;
+    @JsonProperty("match_id")
+    private  String matchId;
 
     Result() {
     }
 
-    public Result(@JsonProperty("winner") String winnerId,
-                  @JsonProperty("loser") String loserId,
-                  @JsonProperty("match_id") String matchId) {
+    public Result(String winnerId,
+                  String loserId,
+                  String matchId) {
         this.winnerId = winnerId;
         this.loserId = loserId;
         this.matchId = matchId;
     }
 
-    @JsonProperty("winner")
+
     public String getWinnerId() {
         return winnerId;
     }
 
-    @JsonProperty("loser")
     public String getLoserId() {
         return loserId;
     }
 
-    @JsonProperty("match_id")
     public String getMatchId() {
         return matchId;
     }