diff --git a/interactive-mining-angular-frontend/angular.json b/interactive-mining-angular-frontend/angular.json
index 3c8fc4f..c7c4c09 100644
--- a/interactive-mining-angular-frontend/angular.json
+++ b/interactive-mining-angular-frontend/angular.json
@@ -22,8 +22,7 @@
             ],
             "styles": [
               "src/styles.css",
-              "src/assets/css/interactive-mining.css",
-              "src/assets/css/animations.css"
+              "src/assets/css/interactive-mining.css"
             ],
             "scripts": [
               "node_modules/jquery/dist/jquery.min.js",
@@ -145,4 +144,4 @@
       "prefix": "app"
     }
   }
-}
\ No newline at end of file
+}
diff --git a/interactive-mining-angular-frontend/package-lock.json b/interactive-mining-angular-frontend/package-lock.json
old mode 100755
new mode 100644
index c64f298..ae19790
--- a/interactive-mining-angular-frontend/package-lock.json
+++ b/interactive-mining-angular-frontend/package-lock.json
@@ -5,12 +5,12 @@
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-      "integrity": "sha512-kKfnnYkbTfrAdd0xICNFw7Atm8nKpLcLv9AZGEt+kczL/WQVai4e2V6ZN8U/O+iI6WrNuJjNNOyu4zfhl9D3Hg==",
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
+      "integrity": "sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==",
       "dev": true
     },
     "zone.js": {
diff --git a/interactive-mining-angular-frontend/package.json b/interactive-mining-angular-frontend/package.json
index af55da4..24b1338 100755
--- a/interactive-mining-angular-frontend/package.json
+++ b/interactive-mining-angular-frontend/package.json
@@ -18,17 +18,16 @@
     "@angular/compiler": "^7.2.14",
     "@angular/core": "^7.2.14",
     "@angular/forms": "^7.2.14",
-    "@angular/http": "^7.2.14",
     "@angular/platform-browser": "^7.2.14",
     "@angular/platform-browser-dynamic": "^7.2.14",
     "@angular/router": "^7.2.14",
     "core-js": "^2.4.1",
     "file-saver": "^2.0.2",
     "jquery": "^3.4.1",
-    "ng-focus-if": "^1.0.7",
     "ng2-nouislider": "^1.8.2",
     "ngx-pagination": "^3.2.1",
     "nouislider": "^13.1.5",
+    "rxjs": "^6.5.1",
     "tslib": "^1.9.0",
     "uikit": "^3.1.5",
     "zone.js": "^0.9.1"
@@ -53,10 +52,7 @@
     "karma-jasmine-html-reporter": "^1.4.2",
     "ng-packagr": "^5.2.0",
     "protractor": "~5.4.2",
-    "rxjs": "6.5.1",
-    "rxjs-compat": "^6.5.1",
     "ts-node": "~8.2.0",
-    "tslint": "~5.16.0",
     "typescript": "~3.2.4"
   }
 }
diff --git a/interactive-mining-angular-frontend/src/app/contents/contents.service.ts b/interactive-mining-angular-frontend/src/app/contents/contents.service.ts
index 759c582..7095cd6 100755
--- a/interactive-mining-angular-frontend/src/app/contents/contents.service.ts
+++ b/interactive-mining-angular-frontend/src/app/contents/contents.service.ts
@@ -1,9 +1,9 @@
 import {Injectable} from '@angular/core';
 import {Content} from './content';
-import {HttpClient, HttpHeaders, HttpParams} from '@angular/common/http';
 import { Observable } from 'rxjs';
 import { map, catchError } from 'rxjs/operators';
 import {Util} from '../util';
+import {HttpClient, HttpHeaders, HttpParams} from '@angular/common/http';
 
 
 @Injectable()
diff --git a/interactive-mining-angular-frontend/src/app/util.ts b/interactive-mining-angular-frontend/src/app/util.ts
index 9ba9be8..92bd1b8 100755
--- a/interactive-mining-angular-frontend/src/app/util.ts
+++ b/interactive-mining-angular-frontend/src/app/util.ts
@@ -1,13 +1,13 @@
 import UIkit from 'uikit';
 import {HttpErrorResponse, HttpResponse} from '@angular/common/http';
-import {ErrorObservable} from 'rxjs/observable/ErrorObservable';
 import { environment } from '../environments/environment';
-import {throwError} from 'rxjs/internal/observable/throwError';
 import {saveAs} from 'file-saver';
+import {Observable} from 'rxjs';
+import {throwError} from 'rxjs';
 
 export class Util {
 
-  public handleError (err: HttpErrorResponse): ErrorObservable<never> {
+  public handleError (err: HttpErrorResponse): Observable<never> {
     if (err.error instanceof Error) {
       console.error('Client-side error occured.');
     } else {