diff --git a/responses.go b/responses.go
index d76368e..384f1cd 100644
--- a/responses.go
+++ b/responses.go
@@ -28,6 +28,15 @@ func init() {
 			if !s.Shown && (s.Direct == nil || *s.Direct != response.IdQuestion) {
 				return APIErrorResponse{err: fmt.Errorf("Cette question n'est pas disponible")}
 			} else if len(response.Answer) > 0 {
+				// Check if the response has changed
+				if response.Id != 0 {
+					if res, err := s.GetResponse(int(response.Id)); err == nil {
+						if res.IdUser == u.Id && res.Answer == response.Answer {
+							continue
+						}
+					}
+				}
+
 				if _, err := s.NewResponse(response.IdQuestion, u.Id, response.Answer); err != nil {
 					return APIErrorResponse{err: err}
 				}
@@ -50,6 +59,15 @@ func init() {
 
 				for _, response := range responses {
 					if len(response.Answer) > 0 {
+						// Check if the response has changed
+						if response.Id != 0 {
+							if res, err := s.GetResponse(int(response.Id)); err == nil {
+								if res.IdUser == u.Id && res.Answer == response.Answer {
+									continue
+								}
+							}
+						}
+
 						if _, err := s.NewResponse(response.IdQuestion, u.Id, response.Answer); err != nil {
 							return APIErrorResponse{err: err}
 						}
diff --git a/ui/src/components/SurveyQuestions.svelte b/ui/src/components/SurveyQuestions.svelte
index 1051e60..9384e39 100644
--- a/ui/src/components/SurveyQuestions.svelte
+++ b/ui/src/components/SurveyQuestions.svelte
@@ -15,7 +15,11 @@
 
      const res = [];
      for (const r in responses) {
-	 res.push({"id_question": responses[r].id_question, "value": String(responses[r].value)})
+	 res.push({
+             "id": responses[r].id,
+             "id_question": responses[r].id_question,
+             "value": String(responses[r].value)
+         })
      }
 
      survey.submitAnswers(res, id_user).then((response) => {