diff --git a/lib/platform/image_cache_io.dart b/lib/platform/image_cache_io.dart
index 5317c70..d4aee93 100644
--- a/lib/platform/image_cache_io.dart
+++ b/lib/platform/image_cache_io.dart
@@ -4,6 +4,7 @@ import 'dart:typed_data';
 import 'package:file/file.dart';
 import 'package:file/local.dart';
 import 'package:logging/logging.dart';
+import 'package:mutex/mutex.dart';
 import 'package:path/path.dart' as path;
 import 'package:path_provider/path_provider.dart';
 import 'package:sqflite_common_ffi/sqflite_ffi.dart';
@@ -33,6 +34,7 @@ class ImageCaches {
   static const version = 1;
   int _size = 0;
   int get size => _size;
+  late Mutex _mutex;
   ImageCaches();
   Future<String?> _desktopFilePath() async {
     final String? exe = await platformPath.getCurrentExe();
@@ -166,6 +168,7 @@ class ImageCaches {
     await _createDir();
     if (!(await _checkDatabase())) await _createTable();
     await _updateSize();
+    _mutex = Mutex();
     _inited = true;
   }
 
@@ -201,39 +204,42 @@ class ImageCaches {
   Future<void> putCache(String uri, Uint8List data,
       Map<String, List<String>> headers, String? realUri) async {
     if (!_inited) return;
-    final u = Uri.parse(uri);
-    final dir = await cacheDir;
-    String p = path.join(dir.path, u.host.isEmpty ? "nohost" : u.host,
-        u.path.substring(1) + (u.hasQuery ? "?${u.query}" : ""));
-    final d = _fs.directory(path.dirname(p));
-    if (isWindows) {
-      if (path.isAbsolute(p)) {
-        p = p.substring(0, 2) +
-            p.substring(2).replaceAll(RegExp("[:\\*\\?\"\\<\\>\\|]"), '_');
-      } else {
-        p = p.replaceAll(RegExp("[:\\*\\?\"\\<\\>\\|]"), '_');
+    await _mutex.protect(() async {
+      final u = Uri.parse(uri);
+      final dir = await cacheDir;
+      String p = path.join(dir.path, u.host.isEmpty ? "nohost" : u.host,
+          u.path.substring(1) + (u.hasQuery ? "?${u.query}" : ""));
+      final d = _fs.directory(path.dirname(p));
+      if (isWindows) {
+        if (path.isAbsolute(p)) {
+          p = p.substring(0, 2) +
+              p.substring(2).replaceAll(RegExp("[:\\*\\?\"\\<\\>\\|]"), '_');
+        } else {
+          p = p.replaceAll(RegExp("[:\\*\\?\"\\<\\>\\|]"), '_');
+        }
       }
-    }
-    if (!(await d.exists())) {
-      await d.create(recursive: true);
-    }
-    final f = _fs.file(p);
-    await f.writeAsBytes(data.toList());
-    final lastUsed = DateTime.now().millisecondsSinceEpoch;
-    final header = jsonEncode(headers);
-    if (_exeDir != null) {
-      p = path.relative(p, from: _exeDir!);
-    }
-    final exes = await _db!.query("images", where: 'url = ?', whereArgs: [uri]);
-    await _db!.rawInsert(
-        "INSERT OR REPLACE INTO images VALUES (?, ?, ?, ?, ?, ?);",
-        [uri, p, lastUsed, header, realUri, data.length]);
-    if (exes.isEmpty) {
-      _size += data.length;
-    } else {
-      final originalSize = (exes[0]["size"] as int?) ?? 0;
-      _size += (data.length - originalSize);
-    }
+      if (!(await d.exists())) {
+        await d.create(recursive: true);
+      }
+      final f = _fs.file(p);
+      await f.writeAsBytes(data.toList());
+      final lastUsed = DateTime.now().millisecondsSinceEpoch;
+      final header = jsonEncode(headers);
+      if (_exeDir != null) {
+        p = path.relative(p, from: _exeDir!);
+      }
+      final exes =
+          await _db!.query("images", where: 'url = ?', whereArgs: [uri]);
+      await _db!.rawInsert(
+          "INSERT OR REPLACE INTO images VALUES (?, ?, ?, ?, ?, ?);",
+          [uri, p, lastUsed, header, realUri, data.length]);
+      if (exes.isEmpty) {
+        _size += data.length;
+      } else {
+        final originalSize = (exes[0]["size"] as int?) ?? 0;
+        _size += (data.length - originalSize);
+      }
+    });
   }
 
   Future<void> updateSize({bool clear = false}) async {
diff --git a/lib/platform/image_cache_web.dart b/lib/platform/image_cache_web.dart
index 15bb945..d028d74 100644
--- a/lib/platform/image_cache_web.dart
+++ b/lib/platform/image_cache_web.dart
@@ -2,6 +2,7 @@ import 'dart:js_interop';
 import 'dart:js_interop_unsafe';
 import 'dart:typed_data';
 import 'package:logging/logging.dart';
+import 'package:mutex/mutex.dart';
 import 'package:web/web.dart';
 import 'web/indexed_db.dart';
 
@@ -14,6 +15,7 @@ class ImageCaches {
   int get size => _size;
   late IndexedDb _db;
   bool _inited = false;
+  late Mutex _mutex;
   Future<void> _updateSize() async {
     int total = 0;
     await _db.openCursor("images", (cur) {
@@ -51,6 +53,7 @@ class ImageCaches {
     }, 1);
     await _db.init();
     await _updateSize();
+    _mutex = Mutex();
     _inited = true;
   }
 
@@ -90,27 +93,29 @@ class ImageCaches {
   Future<void> putCache(String uri, Uint8List data,
       Map<String, List<String>> headers, String? realUri) async {
     if (!_inited) return;
-    final he = JSObject();
-    for (final e in headers.entries) {
-      he.setProperty(e.key.toJS, e.value.map((e) => e.toJS).toList().toJS);
-    }
-    final opts = ResponseInit(status: 200, statusText: 'OK', headers: he);
-    final lastUsed = DateTime.now().millisecondsSinceEpoch;
-    final res = Response(data.toJS, opts);
-    await cache.put(uri.toJS, res).toDart;
-    final oObj = (await _db.get("images", uri.toJS)) as JSObject?;
-    final obj = JSObject();
-    obj.setProperty("url".toJS, uri.toJS);
-    obj.setProperty("size".toJS, data.length.toJS);
-    obj.setProperty("last_used".toJS, lastUsed.toJS);
-    await _db.put("images", obj);
-    if (oObj == null) {
-      _size += data.length;
-    } else {
-      final originalSize =
-          (oObj!.getProperty("size".toJS) as JSNumber).toDartInt;
-      _size += (data.length - originalSize);
-    }
+    await _mutex.protect(() async {
+      final he = JSObject();
+      for (final e in headers.entries) {
+        he.setProperty(e.key.toJS, e.value.map((e) => e.toJS).toList().toJS);
+      }
+      final opts = ResponseInit(status: 200, statusText: 'OK', headers: he);
+      final lastUsed = DateTime.now().millisecondsSinceEpoch;
+      final res = Response(data.toJS, opts);
+      await cache.put(uri.toJS, res).toDart;
+      final oObj = (await _db.get("images", uri.toJS)) as JSObject?;
+      final obj = JSObject();
+      obj.setProperty("url".toJS, uri.toJS);
+      obj.setProperty("size".toJS, data.length.toJS);
+      obj.setProperty("last_used".toJS, lastUsed.toJS);
+      await _db.put("images", obj);
+      if (oObj == null) {
+        _size += data.length;
+      } else {
+        final originalSize =
+            (oObj!.getProperty("size".toJS) as JSNumber).toDartInt;
+        _size += (data.length - originalSize);
+      }
+    });
   }
 
   Future<void> updateSize({bool clear = false}) async {
diff --git a/pubspec.lock b/pubspec.lock
index f155caa..e75d757 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -558,6 +558,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.5"
+  mutex:
+    dependency: "direct main"
+    description:
+      name: mutex
+      sha256: "8827da25de792088eb33e572115a5eb0d61d61a3c01acbc8bcbe76ed78f1a1f2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.0"
   package_config:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index 03cc645..a5c92b4 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -29,6 +29,7 @@ dependencies:
   json_annotation: ^4.9.0
   keymap: ^0.0.92
   logging: ^1.2.0
+  mutex: ^3.1.0
   package_info_plus: ^8.0.0
   palette_generator: ^0.3.3+3
   path: ^1.8.3