diff --git a/lib/app_sources/apkcombo.dart b/lib/app_sources/apkcombo.dart
index 6c5dfa6..16e21c5 100644
--- a/lib/app_sources/apkcombo.dart
+++ b/lib/app_sources/apkcombo.dart
@@ -1,6 +1,5 @@
 import 'package:easy_localization/easy_localization.dart';
 import 'package:html/parser.dart';
-import 'package:http/http.dart';
 import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/source_provider.dart';
 
@@ -85,7 +84,6 @@ class APKCombo extends AppSource {
     Map<String, dynamic> additionalSettings,
   ) async {
     String appId = tryInferringAppId(standardUrl)!;
-    String host = Uri.parse(standardUrl).host;
     var preres = await sourceRequest(standardUrl);
     if (preres.statusCode != 200) {
       throw getObtainiumHttpError(preres);
diff --git a/lib/app_sources/apkpure.dart b/lib/app_sources/apkpure.dart
index 1ab017d..20028a4 100644
--- a/lib/app_sources/apkpure.dart
+++ b/lib/app_sources/apkpure.dart
@@ -1,6 +1,5 @@
 import 'package:easy_localization/easy_localization.dart';
 import 'package:html/parser.dart';
-import 'package:http/http.dart';
 import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/source_provider.dart';
 
diff --git a/lib/app_sources/codeberg.dart b/lib/app_sources/codeberg.dart
index d50332d..5938ec2 100644
--- a/lib/app_sources/codeberg.dart
+++ b/lib/app_sources/codeberg.dart
@@ -1,6 +1,4 @@
-import 'dart:convert';
 import 'package:easy_localization/easy_localization.dart';
-import 'package:http/http.dart';
 import 'package:obtainium/app_sources/github.dart';
 import 'package:obtainium/components/generated_form.dart';
 import 'package:obtainium/custom_errors.dart';
diff --git a/lib/app_sources/fdroidrepo.dart b/lib/app_sources/fdroidrepo.dart
index 184e139..e19b34a 100644
--- a/lib/app_sources/fdroidrepo.dart
+++ b/lib/app_sources/fdroidrepo.dart
@@ -1,6 +1,5 @@
 import 'package:easy_localization/easy_localization.dart';
 import 'package:html/parser.dart';
-import 'package:http/http.dart';
 import 'package:obtainium/components/generated_form.dart';
 import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/source_provider.dart';
diff --git a/lib/app_sources/gitlab.dart b/lib/app_sources/gitlab.dart
index ae65875..f53f8af 100644
--- a/lib/app_sources/gitlab.dart
+++ b/lib/app_sources/gitlab.dart
@@ -83,12 +83,12 @@ class GitLab extends AppSource {
     }
     var json = jsonDecode(res.body) as List<dynamic>;
     Map<String, List<String>> results = {};
-    json.forEach((element) {
+    for (var element in json) {
       results['https://$host/${element['path_with_namespace']}'] = [
         element['name_with_namespace'],
         element['description'] ?? tr('noDescription')
       ];
-    });
+    }
     return results;
   }
 
diff --git a/lib/app_sources/izzyondroid.dart b/lib/app_sources/izzyondroid.dart
index cdab17a..1773558 100644
--- a/lib/app_sources/izzyondroid.dart
+++ b/lib/app_sources/izzyondroid.dart
@@ -1,4 +1,3 @@
-import 'package:http/http.dart';
 import 'package:obtainium/app_sources/fdroid.dart';
 import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/source_provider.dart';
diff --git a/lib/app_sources/jenkins.dart b/lib/app_sources/jenkins.dart
index 804b3fb..b628814 100644
--- a/lib/app_sources/jenkins.dart
+++ b/lib/app_sources/jenkins.dart
@@ -10,7 +10,6 @@ class Jenkins extends AppSource {
     overrideVersionDetectionFormDefault('releaseDateAsVersion', true);
   }
 
-  @override
   String trimJobUrl(String url) {
     RegExp standardUrlRegEx = RegExp('.*/job/[^/]+');
     RegExpMatch? match = standardUrlRegEx.firstMatch(url);
diff --git a/lib/app_sources/sourcehut.dart b/lib/app_sources/sourcehut.dart
index b85758f..6277486 100644
--- a/lib/app_sources/sourcehut.dart
+++ b/lib/app_sources/sourcehut.dart
@@ -1,6 +1,5 @@
 import 'package:html/parser.dart';
 import 'package:http/http.dart';
-import 'package:obtainium/app_sources/github.dart';
 import 'package:obtainium/app_sources/html.dart';
 import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/source_provider.dart';
@@ -58,7 +57,6 @@ class SourceHut extends AppSource {
           throw NoVersionError();
         }
         String? releaseDateString = entry.querySelector('pubDate')?.innerHtml;
-        var link = entry.querySelector('link');
         String releasePage = '$standardUrl/refs/$version';
         DateTime? releaseDate = releaseDateString != null
             ? DateFormat('EEE, dd MMM yyyy HH:mm:ss Z').parse(releaseDateString)
diff --git a/lib/app_sources/vlc.dart b/lib/app_sources/vlc.dart
index 06ad878..c531f26 100644
--- a/lib/app_sources/vlc.dart
+++ b/lib/app_sources/vlc.dart
@@ -1,6 +1,5 @@
 import 'package:html/parser.dart';
 import 'package:http/http.dart';
-import 'package:obtainium/app_sources/html.dart';
 import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/source_provider.dart';
 
diff --git a/lib/pages/app.dart b/lib/pages/app.dart
index b7585c8..3e2e993 100644
--- a/lib/pages/app.dart
+++ b/lib/pages/app.dart
@@ -32,6 +32,7 @@ class _AppPageState extends State<AppPage> {
     getUpdate(String id) {
       appsProvider.checkUpdate(id).catchError((e) {
         showError(e, context);
+        return null;
       });
     }
 
diff --git a/lib/pages/apps.dart b/lib/pages/apps.dart
index 37fa60c..72cdfbc 100644
--- a/lib/pages/apps.dart
+++ b/lib/pages/apps.dart
@@ -71,6 +71,7 @@ class AppsPageState extends State<AppsPage> {
       });
       return appsProvider.checkUpdates().catchError((e) {
         showError(e, context);
+        return <App>[];
       }).whenComplete(() {
         setState(() {
           refreshingSince = null;
@@ -379,6 +380,7 @@ class AppsPageState extends State<AppsPage> {
                       [listedApps[appIndex].app.id],
                       globalNavigatorKey.currentContext).catchError((e) {
                     showError(e, context);
+                    return <String>[];
                   });
                 },
           icon: Icon(
@@ -681,6 +683,7 @@ class AppsPageState extends State<AppsPage> {
                           settingsProvider: settingsProvider)
                       .catchError((e) {
                     showError(e, context);
+                    return <String>[];
                   });
                 }
               });
diff --git a/lib/pages/import_export.dart b/lib/pages/import_export.dart
index 7a896c9..fd10f86 100644
--- a/lib/pages/import_export.dart
+++ b/lib/pages/import_export.dart
@@ -323,8 +323,8 @@ class _ImportExportPageState extends State<ImportExportPage> {
                         ],
                       ),
                       if (importInProgress)
-                        Column(
-                          children: const [
+                        const Column(
+                          children: [
                             SizedBox(
                               height: 14,
                             ),
diff --git a/lib/providers/source_provider.dart b/lib/providers/source_provider.dart
index f498496..6fc9902 100644
--- a/lib/providers/source_provider.dart
+++ b/lib/providers/source_provider.dart
@@ -7,7 +7,6 @@ import 'package:device_info_plus/device_info_plus.dart';
 import 'package:easy_localization/easy_localization.dart';
 import 'package:html/dom.dart';
 import 'package:http/http.dart';
-import 'package:obtainium/app_sources/apkcombo.dart';
 import 'package:obtainium/app_sources/apkmirror.dart';
 import 'package:obtainium/app_sources/apkpure.dart';
 import 'package:obtainium/app_sources/codeberg.dart';