diff --git a/src/app/core/breadcrumbs/collection-breadcrumb.resolver.ts b/src/app/core/breadcrumbs/collection-breadcrumb.resolver.ts
index 7384a031db..80d7563637 100644
--- a/src/app/core/breadcrumbs/collection-breadcrumb.resolver.ts
+++ b/src/app/core/breadcrumbs/collection-breadcrumb.resolver.ts
@@ -8,7 +8,9 @@ import { followLink, FollowLinkConfig } from '../../shared/utils/follow-link-con
 /**
  * The class that resolves the BreadcrumbConfig object for a Collection
  */
-@Injectable()
+@Injectable({
+  providedIn: 'root'
+})
 export class CollectionBreadcrumbResolver extends DSOBreadcrumbResolver<Collection> {
   constructor(protected breadcrumbService: DSOBreadcrumbsService, protected dataService: CollectionDataService) {
     super(breadcrumbService, dataService);
diff --git a/src/app/core/breadcrumbs/community-breadcrumb.resolver.ts b/src/app/core/breadcrumbs/community-breadcrumb.resolver.ts
index d1f21455f2..298d69133f 100644
--- a/src/app/core/breadcrumbs/community-breadcrumb.resolver.ts
+++ b/src/app/core/breadcrumbs/community-breadcrumb.resolver.ts
@@ -8,7 +8,9 @@ import { followLink, FollowLinkConfig } from '../../shared/utils/follow-link-con
 /**
  * The class that resolves the BreadcrumbConfig object for a Community
  */
-@Injectable()
+@Injectable({
+  providedIn: 'root'
+})
 export class CommunityBreadcrumbResolver extends DSOBreadcrumbResolver<Community> {
   constructor(protected breadcrumbService: DSOBreadcrumbsService, protected dataService: CommunityDataService) {
     super(breadcrumbService, dataService);
diff --git a/src/app/core/breadcrumbs/dso-breadcrumb.resolver.ts b/src/app/core/breadcrumbs/dso-breadcrumb.resolver.ts
index 80e68a16f5..09292fec21 100644
--- a/src/app/core/breadcrumbs/dso-breadcrumb.resolver.ts
+++ b/src/app/core/breadcrumbs/dso-breadcrumb.resolver.ts
@@ -13,7 +13,9 @@ import { FollowLinkConfig } from '../../shared/utils/follow-link-config.model';
 /**
  * The class that resolves the BreadcrumbConfig object for a DSpaceObject
  */
-@Injectable()
+@Injectable({
+  providedIn: 'root'
+})
 export abstract class DSOBreadcrumbResolver<T extends ChildHALResource & DSpaceObject> implements Resolve<BreadcrumbConfig<T>> {
   constructor(protected breadcrumbService: DSOBreadcrumbsService, protected dataService: DataService<T>) {
   }
diff --git a/src/app/core/breadcrumbs/dso-breadcrumbs.service.ts b/src/app/core/breadcrumbs/dso-breadcrumbs.service.ts
index 3cb73be876..003c11bf83 100644
--- a/src/app/core/breadcrumbs/dso-breadcrumbs.service.ts
+++ b/src/app/core/breadcrumbs/dso-breadcrumbs.service.ts
@@ -15,7 +15,9 @@ import { Injectable } from '@angular/core';
 /**
  * Service to calculate DSpaceObject breadcrumbs for a single part of the route
  */
-@Injectable()
+@Injectable({
+  providedIn: 'root'
+})
 export class DSOBreadcrumbsService implements BreadcrumbsService<ChildHALResource & DSpaceObject> {
   constructor(
     private linkService: LinkService,
diff --git a/src/app/core/breadcrumbs/i18n-breadcrumb.resolver.ts b/src/app/core/breadcrumbs/i18n-breadcrumb.resolver.ts
index de7d061a3f..1b8c5bcbd1 100644
--- a/src/app/core/breadcrumbs/i18n-breadcrumb.resolver.ts
+++ b/src/app/core/breadcrumbs/i18n-breadcrumb.resolver.ts
@@ -7,7 +7,9 @@ import { hasNoValue } from '../../shared/empty.util';
 /**
  * The class that resolves a BreadcrumbConfig object with an i18n key string for a route
  */
-@Injectable()
+@Injectable({
+  providedIn: 'root'
+})
 export class I18nBreadcrumbResolver implements Resolve<BreadcrumbConfig<string>> {
   constructor(protected breadcrumbService: I18nBreadcrumbsService) {
   }
diff --git a/src/app/core/breadcrumbs/i18n-breadcrumbs.service.ts b/src/app/core/breadcrumbs/i18n-breadcrumbs.service.ts
index e07d9ed541..b774b58126 100644
--- a/src/app/core/breadcrumbs/i18n-breadcrumbs.service.ts
+++ b/src/app/core/breadcrumbs/i18n-breadcrumbs.service.ts
@@ -11,7 +11,9 @@ export const BREADCRUMB_MESSAGE_POSTFIX = '.breadcrumbs';
 /**
  * Service to calculate i18n breadcrumbs for a single part of the route
  */
-@Injectable()
+@Injectable({
+  providedIn: 'root'
+})
 export class I18nBreadcrumbsService implements BreadcrumbsService<string> {
 
   /**
diff --git a/src/app/core/breadcrumbs/item-breadcrumb.resolver.ts b/src/app/core/breadcrumbs/item-breadcrumb.resolver.ts
index cd0c23cf82..8e13eda01d 100644
--- a/src/app/core/breadcrumbs/item-breadcrumb.resolver.ts
+++ b/src/app/core/breadcrumbs/item-breadcrumb.resolver.ts
@@ -8,7 +8,9 @@ import { followLink, FollowLinkConfig } from '../../shared/utils/follow-link-con
 /**
  * The class that resolves the BreadcrumbConfig object for an Item
  */
-@Injectable()
+@Injectable({
+  providedIn: 'root'
+})
 export class ItemBreadcrumbResolver extends DSOBreadcrumbResolver<Item> {
   constructor(protected breadcrumbService: DSOBreadcrumbsService, protected dataService: ItemDataService) {
     super(breadcrumbService, dataService);