diff --git a/kairos-api/Kairos.API/Controllers/StudiesController.cs b/kairos-api/Kairos.API/Controllers/StudiesController.cs
index c2651c5..1c1ca7a 100644
--- a/kairos-api/Kairos.API/Controllers/StudiesController.cs
+++ b/kairos-api/Kairos.API/Controllers/StudiesController.cs
@@ -183,13 +183,16 @@ public async Task<ActionResult> StopStudies()
         // On supprime l'ancienne session
         _memoryCache.Remove(userContext.UserId);
 
+        // Si la session a été actualisé il y a moins de 2 {MinutesMinimumHeatbeat} minutes minutes
         if (liveStudy.LastRefresh.AddMinutes(MinutesMinimumHeatbeat) < DateTime.UtcNow)
         {
             // On la sauvegarde dans la base de données avec le temps du dernier battement
-            var study = new Studies(Guid.NewGuid().ToString(),
-                ((int) (liveStudy.LastRefresh - liveStudy.StartTime).TotalSeconds).ToString(
-                    CultureInfo.InvariantCulture),
-                liveStudy.StartTime, GetPersonalGroup());
+            var study = new Studies(
+                Guid.NewGuid().ToString(),
+                ((int) (liveStudy.LastRefresh - liveStudy.StartTime).TotalSeconds).ToString(CultureInfo.InvariantCulture),
+                liveStudy.StartTime,
+                GetPersonalGroup()
+                );
 
             study.Labels = new List<Label>();
             liveStudy.Labels.ForEach(label =>
@@ -208,9 +211,12 @@ public async Task<ActionResult> StopStudies()
         else
         {
             // On la sauvegarde dans la base de données avec le temps actuel
-            var study = new Studies(Guid.NewGuid().ToString(),
+            var study = new Studies(
+                Guid.NewGuid().ToString(),
                 ((int) (DateTime.UtcNow - liveStudy.LastRefresh).TotalSeconds).ToString(CultureInfo.InvariantCulture),
-                liveStudy.StartTime, GetPersonalGroup());
+                liveStudy.StartTime, 
+                GetPersonalGroup()
+                );
 
             study.Labels = new List<Label>();
             liveStudy.Labels.ForEach(label =>
diff --git a/kairos-web/src/app/components/statistics/statistics.component.ts b/kairos-web/src/app/components/statistics/statistics.component.ts
index d3cb319..b6894b2 100644
--- a/kairos-web/src/app/components/statistics/statistics.component.ts
+++ b/kairos-web/src/app/components/statistics/statistics.component.ts
@@ -140,7 +140,7 @@ export class StatisticsComponent implements AfterViewInit {
           this.modalDialogService.displayModal(error.error.message)
         },
         next: (hoursPerLabel: IHoursStudiedWeekLabelModel) => {
-          this.timeBarChartData.labels = hoursPerLabel.label;
+          this.timeBarChartData.labels = hoursPerLabel.labels;
           this.timeBarChartData.datasets[0].data = hoursPerLabel.hours;
 
           this.refreshChart();
diff --git a/kairos-web/src/app/services/statistics/statistics.service.ts b/kairos-web/src/app/services/statistics/statistics.service.ts
index 4a77afe..c39aa59 100644
--- a/kairos-web/src/app/services/statistics/statistics.service.ts
+++ b/kairos-web/src/app/services/statistics/statistics.service.ts
@@ -9,7 +9,7 @@ export interface IHoursStudiedWeekModel {
 }
 
 export interface IHoursStudiedWeekLabelModel {
-  label: string[];
+  labels: string[];
   hours: number[];
 }
 
diff --git a/kairos-web/src/app/services/timer/timer.service.ts b/kairos-web/src/app/services/timer/timer.service.ts
index 297d501..efc0119 100644
--- a/kairos-web/src/app/services/timer/timer.service.ts
+++ b/kairos-web/src/app/services/timer/timer.service.ts
@@ -9,9 +9,11 @@ import { ModalDialogService } from '../modal-dialog/modal-dialog.service';
   providedIn: 'root'
 })
 export class TimerService implements OnDestroy {
+
+  private subscription: Subscription[] = [];
+
   base: any;
   intervalHeartbeat: any;
-  private subscription: Subscription[] = [];
   labelId: string = "";
   minuteStr: string;
   secondStr: string;
@@ -21,9 +23,9 @@ export class TimerService implements OnDestroy {
   isStarted: boolean = false;
   isCollapsed: boolean = false;
 
-  constructor(private modalDialog: ModalDialogService, 
-    private alertDialog: AlertDialogService, 
-    private http: HttpClient, 
+  constructor(private modalDialog: ModalDialogService,
+    private alertDialog: AlertDialogService,
+    private http: HttpClient,
     private auth: AuthService) {
     this.getValues();
     this.minuteStr = this.updateTime(this.minute);
@@ -112,13 +114,13 @@ export class TimerService implements OnDestroy {
     var modalSubscription = (this.modalDialog.modalValue.subscribe((data => {
         if (data) {
           this.stopCountdown();
-          result = data; 
+          result = data;
         } else {
           modalSubscription.unsubscribe();
         }
       })
     ));
-  
+
     return result;
   }