diff --git a/analysis_options.yaml b/analysis_options.yaml
index 0d29021..f6c04d4 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -7,7 +7,8 @@
 
 # The following line activates a set of recommended lints for Flutter apps,
 # packages, and plugins designed to encourage good coding practices.
-include: package:flutter_lints/flutter.yaml
+include:
+  - package:flutter_lints/flutter.yaml
 
 linter:
   # The lint rules applied to this project can be customized in the
@@ -21,8 +22,20 @@ linter:
   # `// ignore_for_file: name_of_lint` syntax on the line or in the file
   # producing the lint.
   rules:
-    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
-    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+    always_declare_return_types: true
+    annotate_redeclares: true
+    avoid_print: false
+    avoid_setters_without_getters: true
+    avoid_slow_async_io: true
+    directives_ordering: true
+    eol_at_end_of_file: true
+    prefer_const_declarations: true
+    prefer_contains: true
+    prefer_final_fields: true
+    prefer_final_locals: true
+    prefer_single_quotes: true
+    use_key_in_widget_constructors: true
+    use_null_aware_elements: true
 
 # Additional information about this file can be found at
 # https://dart.dev/guides/language/analysis-options
diff --git a/lib/components/search/search_results_body/search_card.dart b/lib/components/search/search_results_body/search_card.dart
index d38c78b..7a63680 100644
--- a/lib/components/search/search_results_body/search_card.dart
+++ b/lib/components/search/search_results_body/search_card.dart
@@ -102,7 +102,7 @@ class _SearchResultCardState extends State<SearchResultCard> {
                 icon: Icons.star,
                 onPressed: (_) =>
                     GetIt.instance.get<Database>().libraryListToggleEntry(
-                      "favourites",
+                      'favourites',
                       jmdictEntryId: widget.result.entryId,
                       kanji: null,
                     ),
diff --git a/lib/database/database.dart b/lib/database/database.dart
index f6c453d..3e8b44f 100644
--- a/lib/database/database.dart
+++ b/lib/database/database.dart
@@ -27,7 +27,7 @@ Future<String> databasePath() async {
 Future<bool> databaseNeedsInitialization() async {
   final String dbPath = await databasePath();
 
-  if (!await File(dbPath).exists()) {
+  if (!File(dbPath).existsSync()) {
     return true;
   }
 
@@ -192,7 +192,7 @@ Future<void> setupDatabase() async {
   final String dbPath = await databasePath();
 
   assert(
-    await File(dbPath).exists(),
+    File(dbPath).existsSync(),
     'Database file should exist at this point',
   );
 
@@ -231,11 +231,9 @@ Future<void> resetDatabase() async {
 Future<void> extractJadbFromAssets(String path) async {
   final File jadbFile = File(path);
 
-  if (!await jadbFile.exists()) {
-    jadbFile.createSync();
-  }
+  jadbFile.createSync();
 
-  ByteData data = await rootBundle.load('assets/jadb.sqlite');
+  final ByteData data = await rootBundle.load('assets/jadb.sqlite');
   await jadbFile.writeAsBytes(
     data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes),
   );
diff --git a/lib/models/history_entry.dart b/lib/models/history_entry.dart
index fa12be4..7dde5ca 100644
--- a/lib/models/history_entry.dart
+++ b/lib/models/history_entry.dart
@@ -81,7 +81,7 @@ extension HistoryEntryExt on DatabaseExecutor {
             )
             .toList();
 
-    KanjiSearchResult? kanjiSearchResult = includeSearchResult
+    final KanjiSearchResult? kanjiSearchResult = includeSearchResult
         ? await jadbSearchKanji(kanji)
         : null;
 
@@ -118,7 +118,7 @@ extension HistoryEntryExt on DatabaseExecutor {
         ${pageSize != null ? 'LIMIT ?' : ''}
         ${page != null ? 'OFFSET ?' : ''}
       ''',
-      [if (pageSize != null) pageSize, if (page != null) page * pageSize!],
+      [?pageSize, if (page != null) page * pageSize!],
     );
 
     final List<HistoryEntry> entries = result.map((e) {
diff --git a/lib/models/library_list.dart b/lib/models/library_list.dart
index b7a7590..e6a0690 100644
--- a/lib/models/library_list.dart
+++ b/lib/models/library_list.dart
@@ -25,7 +25,7 @@ extension LibraryListExt on DatabaseExecutor {
         ${pageSize != null ? 'LIMIT ?' : ''}
         ${page != null ? 'OFFSET ?' : ''}
       ''',
-      [if (pageSize != null) pageSize, if (page != null) page * pageSize!],
+      [?pageSize, if (page != null) page * pageSize!],
     );
 
     //   COUNT(*) AS "count"
@@ -137,7 +137,7 @@ extension LibraryListExt on DatabaseExecutor {
       [
         listName,
         listName,
-        if (pageSize != null) pageSize,
+        ?pageSize,
         if (page != null) page * pageSize!,
       ],
     );
@@ -289,7 +289,7 @@ extension LibraryListExt on DatabaseExecutor {
     bool doesNotExistOk = false,
   }) async {
     assert(listName.isNotEmpty, 'Library list name must not be empty.');
-    assert(listName != "favourites", 'Cannot delete the "favourites" list.');
+    assert(listName != 'favourites', 'Cannot delete the "favourites" list.');
 
     if (!doesNotExistOk && !(await libraryListExists(listName))) {
       return false;
@@ -602,7 +602,7 @@ extension LibraryListExt on DatabaseExecutor {
     String listName,
     List<Map<String, Object?>> jsonEntries,
   ) async {
-    List<LibraryListEntry> entries = jsonEntries
+    final List<LibraryListEntry> entries = jsonEntries
         .map((e) => LibraryListEntry.fromJson(e))
         .toList();
 
@@ -699,7 +699,7 @@ class LibraryListEntry {
     );
     assert(
       json.containsKey('lastModified'),
-      "Library entry must have a lastModified timestamp",
+      'Library entry must have a lastModified timestamp',
     );
 
     if (json.containsKey('kanji') && json['kanji'] != null) {
diff --git a/lib/screens/initialization.dart b/lib/screens/initialization.dart
index f769998..7cbb385 100644
--- a/lib/screens/initialization.dart
+++ b/lib/screens/initialization.dart
@@ -48,7 +48,7 @@ class InitializationView extends StatelessWidget {
                     case CheckDatabase _:
                       return const Text('Checking for database updates...');
 
-                    case BackupUserData s:
+                    case final BackupUserData s:
                       return Column(
                         children: [
                           const Text('Backing up user data...'),
@@ -56,7 +56,7 @@ class InitializationView extends StatelessWidget {
                         ],
                       );
 
-                    case MigrateDatabase s:
+                    case final MigrateDatabase s:
                       return Column(
                         children: [
                           const Text('Performing database migrations...'),
@@ -64,7 +64,7 @@ class InitializationView extends StatelessWidget {
                         ],
                       );
 
-                    case RestoreUserData s:
+                    case final RestoreUserData s:
                       return Column(
                         children: [
                           const Text('Restoring user data...'),
diff --git a/lib/screens/search/kanji_search_result_page.dart b/lib/screens/search/kanji_search_result_page.dart
index 298839e..f6fe900 100644
--- a/lib/screens/search/kanji_search_result_page.dart
+++ b/lib/screens/search/kanji_search_result_page.dart
@@ -96,7 +96,7 @@ class _KanjiSearchResultPageState extends State<KanjiSearchResultPage> {
     final String charcode = kanji.characters.first.codeUnits
         .map((c) => c.toRadixString(16))
         .join();
-    return "https://raw.githubusercontent.com/mistval/kanji_images/master/gifs/$charcode.gif";
+    return 'https://raw.githubusercontent.com/mistval/kanji_images/master/gifs/$charcode.gif';
   }
 
   Widget _body(KanjiSearchResult result) {
@@ -116,7 +116,7 @@ class _KanjiSearchResultPageState extends State<KanjiSearchResultPage> {
               GetIt.instance
                   .get<Database>()
                   .libraryListToggleEntry(
-                    "favourites",
+                    'favourites',
                     jmdictEntryId: null,
                     kanji: result.kanji,
                   )
@@ -169,7 +169,7 @@ class _KanjiSearchResultPageState extends State<KanjiSearchResultPage> {
 
     GetIt.instance
         .get<Database>()
-        .libraryListListContains("favourites", kanji: widget.kanji)
+        .libraryListListContains('favourites', kanji: widget.kanji)
         .then((value) => setState(() => isFavourite = value));
 
     if (!incognitoModeEnabled && !addedToDatabase) {
diff --git a/lib/services/initialization/initialization_cubit.dart b/lib/services/initialization/initialization_cubit.dart
index aa108b4..6b83fd8 100644
--- a/lib/services/initialization/initialization_cubit.dart
+++ b/lib/services/initialization/initialization_cubit.dart
@@ -37,7 +37,7 @@ class InitializationCubit extends Cubit<InitializationStatus> {
     emit(CheckDatabase());
     if (deleteDatabase || await databaseNeedsInitialization()) {
       final String dbPath = await databasePath();
-      final databaseAlreadyExists = await File(dbPath).exists();
+      final databaseAlreadyExists = File(dbPath).existsSync();
 
       late final File? tmpdirDataDump;
 
diff --git a/test/models/library_test.dart b/test/models/library_test.dart
index 37b4059..c641ba3 100644
--- a/test/models/library_test.dart
+++ b/test/models/library_test.dart
@@ -17,7 +17,7 @@ Future<Database> createDatabaseCopy({
 }) async {
   final jadbFile = File(jadbPath);
   if (!jadbFile.existsSync()) {
-    throw Exception("JADB_PATH does not exist: $jadbPath");
+    throw Exception('JADB_PATH does not exist: $jadbPath');
   }
 
   // Make a copy of jadbPath
@@ -25,12 +25,12 @@ Future<Database> createDatabaseCopy({
       .nextInt((pow(2, 32) - 1) as int)
       .toRadixString(16);
   final jadbCopyPath = jadbFile.parent.uri
-      .resolve("jadb_copy_$random_suffix.sqlite")
+      .resolve('jadb_copy_$random_suffix.sqlite')
       .path;
 
   await jadbFile.copy(jadbCopyPath);
 
-  print("Using database copy: $jadbCopyPath");
+  print('Using database copy: $jadbCopyPath');
 
   // Initialize FFI
   sqfliteFfiInit();
@@ -48,19 +48,19 @@ Future<Database> createDatabaseCopy({
 }
 
 Future<void> insertTestData(Database db) async {
-  final libraryList1 = await db.libraryListInsertList("Test Library 1");
+  final libraryList1 = await db.libraryListInsertList('Test Library 1');
   assert(libraryList1 == true);
 
   await db.libraryListInsertEntry(
-    "Test Library 1",
+    'Test Library 1',
     jmdictEntryId: null,
-    kanji: "漢",
+    kanji: '漢',
   );
 
   await db.libraryListInsertEntry(
-    "Test Library 1",
+    'Test Library 1',
     jmdictEntryId: null,
-    kanji: "字",
+    kanji: '字',
   );
 }
 
@@ -70,19 +70,19 @@ void main() {
   late final Database database;
 
   setUpAll(() {
-    if (!Platform.environment.containsKey("LIBSQLITE_PATH")) {
-      throw Exception("LIBSQLITE_PATH environment variable is not set.");
+    if (!Platform.environment.containsKey('LIBSQLITE_PATH')) {
+      throw Exception('LIBSQLITE_PATH environment variable is not set.');
     }
 
-    if (!Platform.environment.containsKey("JADB_PATH")) {
-      throw Exception("JADB_PATH environment variable is not set.");
+    if (!Platform.environment.containsKey('JADB_PATH')) {
+      throw Exception('JADB_PATH environment variable is not set.');
     }
 
     libsqlitePath = File(
-      Platform.environment["LIBSQLITE_PATH"]!,
+      Platform.environment['LIBSQLITE_PATH']!,
     ).resolveSymbolicLinksSync();
     jadbPath = File(
-      Platform.environment["JADB_PATH"]!,
+      Platform.environment['JADB_PATH']!,
     ).resolveSymbolicLinksSync();
   });