diff --git a/mediarepo-ui/src-tauri/Cargo.lock b/mediarepo-ui/src-tauri/Cargo.lock
index df284a3..312f22f 100644
--- a/mediarepo-ui/src-tauri/Cargo.lock
+++ b/mediarepo-ui/src-tauri/Cargo.lock
@@ -1581,7 +1581,7 @@ checksum = "a3e378b66a060d48947b590737b30a1be76706c8dd7b8ba0f2fe3989c68a853f"
 [[package]]
 name = "mediarepo-api"
 version = "0.1.0"
-source = "git+https://github.com/Trivernis/mediarepo-api.git?rev=4600810fca96bf6b457adc39667245a46127e5e8#4600810fca96bf6b457adc39667245a46127e5e8"
+source = "git+https://github.com/Trivernis/mediarepo-api.git?rev=547947b05a28bb8a9191d3691d91dc7e3c68af0f#547947b05a28bb8a9191d3691d91dc7e3c68af0f"
 dependencies = [
  "async-trait",
  "chrono",
diff --git a/mediarepo-ui/src-tauri/Cargo.toml b/mediarepo-ui/src-tauri/Cargo.toml
index cf835ff..52a2d26 100644
--- a/mediarepo-ui/src-tauri/Cargo.toml
+++ b/mediarepo-ui/src-tauri/Cargo.toml
@@ -30,7 +30,7 @@ features = ["env-filter"]
 
 [dependencies.mediarepo-api]
 git = "https://github.com/Trivernis/mediarepo-api.git"
-rev = "4600810fca96bf6b457adc39667245a46127e5e8"
+rev = "547947b05a28bb8a9191d3691d91dc7e3c68af0f"
 features = ["tauri-plugin"]
 
 [features]
diff --git a/mediarepo-ui/src/app/app.component.ts b/mediarepo-ui/src/app/app.component.ts
index 8955f9d..c10aa00 100644
--- a/mediarepo-ui/src/app/app.component.ts
+++ b/mediarepo-ui/src/app/app.component.ts
@@ -17,7 +17,6 @@ export class AppComponent implements OnInit{
     private router: Router,
     private snackBar: MatSnackBar,
     private errorBroker: ErrorBrokerService,
-    private dataloaderService: DataloaderService,
     private repoService: RepositoryService,
   ) {
   }
@@ -25,7 +24,7 @@ export class AppComponent implements OnInit{
   async ngOnInit() {
     this.errorBroker.errorCb = (err: { message: string }) => this.showError(err);
     this.errorBroker.infoCb = (info: string) => this.showInfo(info);
-    await this.dataloaderService.loadData();
+    await this.repoService.loadRepositories();
     if (this.repoService.selectedRepository.getValue() == undefined) {
       await this.router.navigate(["repositories"])
     }
diff --git a/mediarepo-ui/src/app/components/file-search/file-search.component.html b/mediarepo-ui/src/app/components/file-search/file-search.component.html
index a74f731..783e932 100644
--- a/mediarepo-ui/src/app/components/file-search/file-search.component.html
+++ b/mediarepo-ui/src/app/components/file-search/file-search.component.html
@@ -1,7 +1,7 @@
 <mat-form-field class="full-width" #tagSearch appearance="fill">
     <mat-chip-list #chipList>
       <mat-chip *ngFor="let tag of searchTags" (removed)="removeSearchTag(tag)" [removable]="true">
-        {{tag}}
+        {{tag.getNormalizedTag()}}
         <button matChipRemove>
           <mat-icon>cancel</mat-icon>
         </button>
diff --git a/mediarepo-ui/src/app/components/file-search/file-search.component.ts b/mediarepo-ui/src/app/components/file-search/file-search.component.ts
index fdc631e..a8baa87 100644
--- a/mediarepo-ui/src/app/components/file-search/file-search.component.ts
+++ b/mediarepo-ui/src/app/components/file-search/file-search.component.ts
@@ -7,6 +7,7 @@ import {MatChipInputEvent} from "@angular/material/chips";
 import {MatAutocompleteSelectedEvent} from "@angular/material/autocomplete";
 import {map, startWith} from "rxjs/operators";
 import {Observable} from "rxjs";
+import {TagQuery} from "../../models/TagQuery";
 
 @Component({
   selector: 'app-file-search',
@@ -17,7 +18,7 @@ export class FileSearchComponent {
 
   public searchInputSeparators = [COMMA];
   public formControl = new FormControl();
-  public searchTags: string[] = [];
+  public searchTags: TagQuery[] = [];
   public suggestionTags: Observable<string[]>;
   private allTags: string[] = [];
 
@@ -29,7 +30,7 @@ export class FileSearchComponent {
 
     this.suggestionTags = this.formControl.valueChanges.pipe(startWith(null), map(
       (tag: string | null) => tag ? this.allTags.filter(
-        (t: string) => t.includes(tag)).slice(0, 20) : this.allTags.slice(0, 20)));
+        (t: string) => t.includes(tag.replace(/^-/g, ''))).map((t) => tag.startsWith("-")? "-" + t : t).slice(0, 20) : this.allTags.slice(0, 20)));
   }
 
   public async searchForFiles() {
@@ -37,10 +38,14 @@ export class FileSearchComponent {
   }
 
   public addSearchTag(tag: string) {
-    this.searchTags.push(tag);
+    if (tag.startsWith("-")) {
+      this.searchTags.push(new TagQuery(tag.replace(/^-/g, ''), true));
+    } else {
+      this.searchTags.push(new TagQuery(tag, false));
+    }
   }
 
-  async removeSearchTag(tag: string) {
+  async removeSearchTag(tag: TagQuery) {
     const index = this.searchTags.indexOf(tag);
     if (index >= 0) {
       this.searchTags.splice(index, 1);
@@ -50,8 +55,8 @@ export class FileSearchComponent {
 
   async addSearchTagByChip(event: MatChipInputEvent) {
     const tag = event.value.trim();
-    if (tag.length > 0 && this.allTags.includes(tag)) {
-      this.searchTags.push(tag);
+    if (tag.length > 0 && this.allTags.includes(tag.replace(/-/g, ''))) {
+      this.addSearchTag(tag);
       event.chipInput?.clear();
       this.formControl.setValue(null);
       await this.searchForFiles();    }
@@ -59,7 +64,7 @@ export class FileSearchComponent {
 
   async addSearchTagByAutocomplete(event: MatAutocompleteSelectedEvent) {
     const tag = event.option.viewValue;
-    this.searchTags.push(tag);
+    this.addSearchTag(tag);
     this.formControl.setValue(null);
     this.tagInput.nativeElement.value = '';
     await this.searchForFiles();  }
diff --git a/mediarepo-ui/src/app/models/TagQuery.ts b/mediarepo-ui/src/app/models/TagQuery.ts
new file mode 100644
index 0000000..818f0ee
--- /dev/null
+++ b/mediarepo-ui/src/app/models/TagQuery.ts
@@ -0,0 +1,8 @@
+export class TagQuery {
+  constructor(public name: string, public negate: boolean) {
+  }
+
+  public getNormalizedTag(): string {
+    return this.negate? "-" + this.name : this.name;
+  }
+}
diff --git a/mediarepo-ui/src/app/pages/home/home.component.ts b/mediarepo-ui/src/app/pages/home/home.component.ts
index 4eabd72..5e3e802 100644
--- a/mediarepo-ui/src/app/pages/home/home.component.ts
+++ b/mediarepo-ui/src/app/pages/home/home.component.ts
@@ -13,14 +13,18 @@ import {Observable} from "rxjs";
 import {map, startWith} from "rxjs/operators";
 import {FormControl} from "@angular/forms";
 import {FileSearchComponent} from "../../components/file-search/file-search.component";
+import {DataloaderService} from "../../services/dataloader/dataloader.service";
 
 @Component({
   selector: 'app-home',
   templateUrl: './home.component.html',
   styleUrls: ['./home.component.scss']
 })
-export class HomeComponent {
+export class HomeComponent implements OnInit {
+  public async ngOnInit(): Promise<void> {
+    await this.dataloaderService.loadData();
+  }
 
 
-  constructor() {}
+  constructor(private dataloaderService: DataloaderService) {}
 }
diff --git a/mediarepo-ui/src/app/services/dataloader/dataloader.service.ts b/mediarepo-ui/src/app/services/dataloader/dataloader.service.ts
index ff3e901..208b6da 100644
--- a/mediarepo-ui/src/app/services/dataloader/dataloader.service.ts
+++ b/mediarepo-ui/src/app/services/dataloader/dataloader.service.ts
@@ -12,13 +12,11 @@ export class DataloaderService {
 
   constructor(
     private erroBroker: ErrorBrokerService,
-    private repositoryService: RepositoryService,
     private fileService: FileService,
     private tagService: TagService) { }
 
   public async loadData() {
     try {
-      await this.repositoryService.loadRepositories();
       await this.tagService.loadTags();
       await this.fileService.getFiles();
     } catch (err) {
diff --git a/mediarepo-ui/src/app/services/file/file.service.ts b/mediarepo-ui/src/app/services/file/file.service.ts
index 49f9bfd..439e96b 100644
--- a/mediarepo-ui/src/app/services/file/file.service.ts
+++ b/mediarepo-ui/src/app/services/file/file.service.ts
@@ -4,6 +4,7 @@ import {File} from "../../models/File";
 import {invoke} from "@tauri-apps/api/tauri";
 import {DomSanitizer, SafeResourceUrl} from "@angular/platform-browser";
 import {Thumbnail} from "../../models/Thumbnail";
+import {TagQuery} from "../../models/TagQuery";
 
 @Injectable({
   providedIn: 'root'
@@ -21,7 +22,7 @@ export class FileService {
     this.displayedFiles.next(all_files);
   }
 
-  public async findFiles(tags: string[]) {
+  public async findFiles(tags: TagQuery[]) {
     let files = await invoke<File[]>("plugin:mediarepo|find_files", {tags});
     this.displayedFiles.next(files);
   }
diff --git a/mediarepo-ui/src/app/services/repository/repository.service.ts b/mediarepo-ui/src/app/services/repository/repository.service.ts
index e39f8af..16f44c8 100644
--- a/mediarepo-ui/src/app/services/repository/repository.service.ts
+++ b/mediarepo-ui/src/app/services/repository/repository.service.ts
@@ -5,6 +5,7 @@ import {invoke} from "@tauri-apps/api/tauri";
 import {listen} from "@tauri-apps/api/event";
 import {Info} from "../../models/Info";
 import {ErrorBrokerService} from "../error-broker/error-broker.service";
+import {DataloaderService} from "../dataloader/dataloader.service";
 
 @Injectable({
   providedIn: 'root'
@@ -13,7 +14,7 @@ export class RepositoryService {
   repositories = new BehaviorSubject<Repository[]>([]);
   public selectedRepository = new BehaviorSubject<Repository | undefined>(undefined);
 
-  constructor(private errorBroker: ErrorBrokerService) {
+  constructor(private errorBroker: ErrorBrokerService, private dataloaderService: DataloaderService) {
     this.registerListener()
   }
 
@@ -35,6 +36,7 @@ export class RepositoryService {
   public async setRepository(repo: Repository) {
     await invoke("plugin:mediarepo|select_repository", {name: repo.name});
     this.selectedRepository.next(repo);
+    await this.dataloaderService.loadData();
   }
 
   public async addRepository(name: string, path: string) {