diff --git a/api/src/main/java/lab/en2b/quizapi/game/Game.java b/api/src/main/java/lab/en2b/quizapi/game/Game.java
index 579f0346..76e03aeb 100644
--- a/api/src/main/java/lab/en2b/quizapi/game/Game.java
+++ b/api/src/main/java/lab/en2b/quizapi/game/Game.java
@@ -7,7 +7,9 @@
 import lab.en2b.quizapi.questions.question.Question;
 import lombok.*;
 
+import java.time.Instant;
 import java.time.LocalDateTime;
+import java.time.OffsetDateTime;
 import java.util.List;
 
 @Entity
@@ -29,7 +31,7 @@ public class Game {
 
     private Long correctlyAnsweredQuestions = 0L;
     private String language;
-    private LocalDateTime roundStartTime;
+    private String roundStartTime;
     @NonNull
     private Integer roundDuration;
     private boolean currentQuestionAnswered;
@@ -62,7 +64,7 @@ public void newRound(Question question){
         setCurrentQuestionAnswered(false);
         getQuestions().add(question);
         increaseRound();
-        setRoundStartTime(LocalDateTime.now());
+        setRoundStartTime(Instant.now().toString());
     }
 
     private void increaseRound(){
@@ -90,7 +92,7 @@ private boolean currentRoundIsOver(){
     }
 
     private boolean roundTimeHasExpired(){
-        return getRoundStartTime()!= null && LocalDateTime.now().isAfter(getRoundStartTime().plusSeconds(getRoundDuration()));
+        return getRoundStartTime()!= null && Instant.now().isAfter(Instant.parse(getRoundStartTime()).plusSeconds(getRoundDuration()));
     }
 
     public boolean answerQuestion(Long answerId){
diff --git a/api/src/main/java/lab/en2b/quizapi/game/dtos/GameResponseDto.java b/api/src/main/java/lab/en2b/quizapi/game/dtos/GameResponseDto.java
index 991ec4a3..ffb37336 100644
--- a/api/src/main/java/lab/en2b/quizapi/game/dtos/GameResponseDto.java
+++ b/api/src/main/java/lab/en2b/quizapi/game/dtos/GameResponseDto.java
@@ -9,6 +9,7 @@
 import lombok.EqualsAndHashCode;
 
 import java.time.LocalDateTime;
+import java.time.OffsetDateTime;
 
 @AllArgsConstructor
 @Data
@@ -34,7 +35,7 @@ public class GameResponseDto {
 
     @Schema(description = "Moment when the timer has started", example = "LocalDateTime.now()")
     @JsonProperty("round_start_time")
-    private LocalDateTime roundStartTime;
+    private String roundStartTime;
 
     @Schema(description = "Number of seconds for the player to answer the question", example = "20")
     @JsonProperty("round_duration")
diff --git a/api/src/test/java/lab/en2b/quizapi/game/GameServiceTest.java b/api/src/test/java/lab/en2b/quizapi/game/GameServiceTest.java
index 16ca722d..ab02dc2d 100644
--- a/api/src/test/java/lab/en2b/quizapi/game/GameServiceTest.java
+++ b/api/src/test/java/lab/en2b/quizapi/game/GameServiceTest.java
@@ -220,7 +220,7 @@ public void getCurrentQuestionRoundFinished() {
         when(questionService.findRandomQuestion(any())).thenReturn(defaultQuestion);
         when(userService.getUserByAuthentication(authentication)).thenReturn(defaultUser);
         gameService.startRound(1L,authentication);
-        defaultGame.setRoundStartTime(LocalDateTime.now().minusSeconds(100));
+        defaultGame.setRoundStartTime(Instant.now().minusSeconds(100).toString());
         assertThrows(IllegalStateException.class, () -> gameService.getCurrentQuestion(1L,authentication));
     }
 
@@ -285,7 +285,7 @@ public void answerQuestionWhenRoundHasFinished(){
         when(questionService.findRandomQuestion(any())).thenReturn(defaultQuestion);
         gameService.newGame(authentication);
         gameService.startRound(1L, authentication);
-        defaultGame.setRoundStartTime(LocalDateTime.now().minusSeconds(100));
+        defaultGame.setRoundStartTime(Instant.now().minusSeconds(100).toString());
         assertThrows(IllegalStateException.class, () -> gameService.answerQuestion(1L, new GameAnswerDto(1L), authentication));
     }