diff --git a/kdb-web/src/app/modules/shared/components/history-btn/history-btn.component.ts b/kdb-web/src/app/modules/shared/components/history-btn/history-btn.component.ts
index 60fd98bf..db89ea41 100644
--- a/kdb-web/src/app/modules/shared/components/history-btn/history-btn.component.ts
+++ b/kdb-web/src/app/modules/shared/components/history-btn/history-btn.component.ts
@@ -11,15 +11,15 @@ export class HistoryBtnComponent implements OnInit {
   @Input() history: History[] = [];
   @Input() translationKey: string = "";
 
-  showSidebar = false;
+  public showSidebar: boolean = false;
 
-  constructor() {
+  public constructor() {
   }
 
-  ngOnInit(): void {
+  public ngOnInit(): void {
   }
 
-  openHistory(): void {
+  public openHistory(): void {
     this.showSidebar = true;
     let oldHistory: Partial<History> = {};
     for (const history of this.history) {
@@ -36,7 +36,7 @@ export class HistoryBtnComponent implements OnInit {
     }
   }
 
-  getAttributeTranslationKey(key: string) {
+  public getAttributeTranslationKey(key: string): string {
     return `common.history.${key}`;
   }