diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5285d35..99a3cd2 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -11,16 +11,19 @@ coverage:
   dependencies: []
   script:
     - apt update
-    - apt install -y curl gnupg2 git
-    - curl https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -
-    - curl https://storage.googleapis.com/download.dartlang.org/linux/debian/dart_stable.list > /etc/apt/sources.list.d/dart_stable.list
+    - apt install -y curl gnupg2 git unzip
+    - git clone https://github.com/flutter/flutter.git -b stable
+    - export PATH="$PATH:`pwd`/flutter/bin"
+    - sed -i s/#//g pubspec.yaml
+    - flutter doctor
     - apt update
-    - apt install -y dart chromium lcov libolm3 sqlite3 libsqlite3-dev
+    - apt install -y chromium lcov libolm3 sqlite3 libsqlite3-dev
     - ln -s /usr/lib/dart/bin/pub /usr/bin/
     - useradd -m test
     - chown -R 'test:' '.'
     - chmod +x ./prepare.sh
     - chmod +x ./test.sh
+    - rm -r example
     - su -c ./prepare.sh test
     - su -c ./test.sh test
   artifacts:
@@ -125,4 +128,4 @@ pages:
     paths:
       - public
   only:
-    - main
\ No newline at end of file
+    - main
diff --git a/lib/src/client.dart b/lib/src/client.dart
index d6794b4..4abcd23 100644
--- a/lib/src/client.dart
+++ b/lib/src/client.dart
@@ -762,6 +762,8 @@ class Client extends MatrixApi {
         _sortRooms();
       }
       prevBatch = syncResp.nextBatch;
+      await database?.deleteOldFiles(
+          DateTime.now().subtract(Duration(days: 30)).millisecondsSinceEpoch);
       await _updateUserDeviceKeys();
       if (encryptionEnabled) {
         encryption.onSync();
diff --git a/lib/src/database/database.dart b/lib/src/database/database.dart
index a61dfa3..9de2ff3 100644
--- a/lib/src/database/database.dart
+++ b/lib/src/database/database.dart
@@ -164,8 +164,8 @@ class Database extends _$Database {
   Future<DbClient> getClient(String name) async {
     final res = await dbGetClient(name).get();
     if (res.isEmpty) return null;
-    await markPendingEventsAsError(res.first.clientId);
-    return res.first;
+    await markPendingEventsAsError(res.single.clientId);
+    return res.single;
   }
 
   Future<Map<String, sdk.DeviceKeysList>> getUserDeviceKeys(
@@ -216,7 +216,7 @@ class Database extends _$Database {
     if (res.isEmpty) {
       return null;
     }
-    return res.first;
+    return res.single;
   }
 
   Future<List<DbInboundGroupSession>> getDbInboundGroupSessions(
@@ -231,7 +231,7 @@ class Database extends _$Database {
     if (res.isEmpty) {
       return null;
     }
-    return res.first;
+    return res.single;
   }
 
   Future<DbSSSSCache> getSSSSCache(int clientId, String type) async {
@@ -239,7 +239,7 @@ class Database extends _$Database {
     if (res.isEmpty) {
       return null;
     }
-    return res.first;
+    return res.single;
   }
 
   Future<List<sdk.Room>> getRoomList(sdk.Client client,
@@ -563,7 +563,7 @@ class Database extends _$Database {
     if (event.isEmpty) {
       return null;
     }
-    return sdk.Event.fromDb(event.first, room);
+    return sdk.Event.fromDb(event.single, room);
   }
 
   Future<bool> redactMessage(int clientId, sdk.EventUpdate eventUpdate) async {
@@ -649,7 +649,7 @@ class Database extends _$Database {
     if (res.isEmpty) {
       return null;
     }
-    return sdk.Event.fromDb(res.first, room).asUser;
+    return sdk.Event.fromDb(res.single, room).asUser;
   }
 
   Future<List<sdk.User>> getUsers(int clientId, sdk.Room room) async {
@@ -673,6 +673,6 @@ class Database extends _$Database {
   Future<Uint8List> getFile(String mxcUri) async {
     final res = await dbGetFile(mxcUri).get();
     if (res.isEmpty) return null;
-    return res.first.bytes;
+    return res.single.bytes;
   }
 }
diff --git a/lib/src/database/database.g.dart b/lib/src/database/database.g.dart
index 984288a..52a2ac4 100644
--- a/lib/src/database/database.g.dart
+++ b/lib/src/database/database.g.dart
@@ -6892,6 +6892,15 @@ abstract class _$Database extends GeneratedDatabase {
     );
   }
 
+  Future<int> deleteOldFiles(int saved_at) {
+    return customUpdate(
+      'DELETE FROM files WHERE saved_at < :saved_at',
+      variables: [Variable.withInt(saved_at)],
+      updates: {files},
+      updateKind: UpdateKind.delete,
+    );
+  }
+
   @override
   Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
   @override
diff --git a/lib/src/database/database.moor b/lib/src/database/database.moor
index 7624359..6399574 100644
--- a/lib/src/database/database.moor
+++ b/lib/src/database/database.moor
@@ -234,3 +234,4 @@ removeSuccessfulRoomEvents: DELETE FROM events WHERE client_id = :client_id AND
 storeFile: INSERT OR REPLACE INTO files (mxc_uri, bytes, saved_at) VALUES (:mxc_uri, :bytes, :time);
 dbGetFile: SELECT * FROM files WHERE mxc_uri = :mxc_uri;
 markPendingEventsAsError: UPDATE events SET status = -1 WHERE client_id = :client_id AND status = 0;
+deleteOldFiles: DELETE FROM files WHERE saved_at < :saved_at;
diff --git a/lib/src/event.dart b/lib/src/event.dart
index af7bc54..6ec4df4 100644
--- a/lib/src/event.dart
+++ b/lib/src/event.dart
@@ -234,7 +234,7 @@ class Event extends MatrixEvent {
 
   String get messageType => type == EventTypes.Sticker
       ? MessageTypes.Sticker
-      : content['msgtype'] ?? MessageTypes.Text;
+      : (content['msgtype'] is String ? content['msgtype'] : MessageTypes.Text);
 
   void setRedactionEvent(Event redactedBecause) {
     unsigned = {
@@ -281,10 +281,11 @@ class Event extends MatrixEvent {
   }
 
   /// Returns the body of this event if it has a body.
-  String get text => content['body'] ?? '';
+  String get text => content['body'] is String ? content['body'] : '';
 
   /// Returns the formatted boy of this event if it has a formatted body.
-  String get formattedText => content['formatted_body'] ?? '';
+  String get formattedText =>
+      content['formatted_body'] is String ? content['formatted_body'] : '';
 
   /// Use this to get the body.
   String get body {
@@ -800,13 +801,13 @@ class Event extends MatrixEvent {
   /// Returns if a given event only has emotes, emojis or whitespace as content.
   /// This is useful to determine if stand-alone emotes should be displayed bigger.
   bool get onlyEmotes => isRichMessage
-      ? _onlyEmojiEmoteRegex.hasMatch(content['formatted_body'])
-      : _onlyEmojiRegex.hasMatch(content['body'] ?? '');
+      ? _onlyEmojiEmoteRegex.hasMatch(formattedText)
+      : _onlyEmojiRegex.hasMatch(text);
 
   /// Gets the number of emotes in a given message. This is useful to determine if
   /// emotes should be displayed bigger. WARNING: This does **not** test if there are
   /// only emotes. Use `event.onlyEmotes` for that!
   int get numberEmotes => isRichMessage
-      ? _countEmojiEmoteRegex.allMatches(content['formatted_body']).length
-      : _countEmojiRegex.allMatches(content['body'] ?? '').length;
+      ? _countEmojiEmoteRegex.allMatches(formattedText).length
+      : _countEmojiRegex.allMatches(text).length;
 }
diff --git a/lib/src/room.dart b/lib/src/room.dart
index aba01d2..80f34ba 100644
--- a/lib/src/room.dart
+++ b/lib/src/room.dart
@@ -174,7 +174,8 @@ class Room {
       StreamController.broadcast();
 
   /// The name of the room if set by a participant.
-  String get name => states[EventTypes.RoomName] != null
+  String get name => states[EventTypes.RoomName] != null &&
+          states[EventTypes.RoomName].content['name'] is String
       ? states[EventTypes.RoomName].content['name']
       : '';
 
@@ -205,14 +206,15 @@ class Room {
   }
 
   /// The topic of the room if set by a participant.
-  String get topic => states[EventTypes.RoomTopic] != null
+  String get topic => states[EventTypes.RoomTopic] != null &&
+          states[EventTypes.RoomTopic].content['topic'] is String
       ? states[EventTypes.RoomTopic].content['topic']
       : '';
 
   /// The avatar of the room if set by a participant.
   Uri get avatar {
     if (states[EventTypes.RoomAvatar] != null &&
-        states[EventTypes.RoomAvatar].content['url'] != null) {
+        states[EventTypes.RoomAvatar].content['url'] is String) {
       return Uri.parse(states[EventTypes.RoomAvatar].content['url']);
     }
     if (mHeroes != null && mHeroes.length == 1 && states[mHeroes[0]] != null) {
diff --git a/prepare.sh b/prepare.sh
index e480bfb..a619b42 100644
--- a/prepare.sh
+++ b/prepare.sh
@@ -20,4 +20,8 @@ cmake --build .
 cd ..
 fi
 
-pub get
+if which flutter >/dev/null; then
+    flutter pub get
+else
+    pub get
+fi
diff --git a/pubspec.yaml b/pubspec.yaml
index 2c283e1..8ae05fd 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -30,8 +30,5 @@ dev_dependencies:
   moor_generator: ^3.0.0
   build_runner: ^1.5.2
   pedantic: ^1.9.0
-  moor_ffi: ^0.5.0
-
-dependency_overrides:
-  # See https://github.com/flutter/flutter/issues/62240
-  analyzer: '0.39.14'
+  #flutter_test:
+  #  sdk: flutter
diff --git a/test.sh b/test.sh
index f6300dd..0c3f63a 100644
--- a/test.sh
+++ b/test.sh
@@ -1,6 +1,6 @@
 #!/bin/sh -e
 # pub run test -p vm
-pub run test_coverage --print-test-output
-pub global activate remove_from_coverage
-pub global run remove_from_coverage:remove_from_coverage -f coverage/lcov.info -r '\.g\.dart$'
+flutter test --coverage
+flutter pub global activate remove_from_coverage
+flutter pub global run remove_from_coverage:remove_from_coverage -f coverage/lcov.info -r '\.g\.dart$'
 genhtml -o coverage coverage/lcov.info || true
diff --git a/test/fake_database.dart b/test/fake_database.dart
index 7d85757..d270c80 100644
--- a/test/fake_database.dart
+++ b/test/fake_database.dart
@@ -18,7 +18,7 @@
 
 import 'package:famedlysdk/famedlysdk.dart';
 import 'package:moor/moor.dart';
-import 'package:moor_ffi/moor_ffi.dart' as moor;
+import 'package:moor/ffi.dart' as moor;
 
 Database getDatabase() {
   moorRuntimeOptions.dontWarnAboutMultipleDatabases = true;