diff --git a/dev-doc/updating-c-library.md b/dev-doc/updating-c-library.md
index 1f3e55a2..5641b6a3 100644
--- a/dev-doc/updating-c-library.md
+++ b/dev-doc/updating-c-library.md
@@ -19,7 +19,7 @@ For the Flutter plugins on Android ([view releases](https://github.com/objectbox
 
 For the Flutter plugins on iOS/macOS ([view releases](https://github.com/objectbox/objectbox-swift/releases))
 ```
-./tool/set-swift-version.sh 2.0.0
+./tool/set-swift-version.sh 4.0.0
 ```
 
 For each, add an entry (see previous releases) to the [CHANGELOG](../objectbox/CHANGELOG.md).
diff --git a/flutter_libs/ios/objectbox_flutter_libs.podspec b/flutter_libs/ios/objectbox_flutter_libs.podspec
index 7999c778..90e81312 100644
--- a/flutter_libs/ios/objectbox_flutter_libs.podspec
+++ b/flutter_libs/ios/objectbox_flutter_libs.podspec
@@ -18,7 +18,7 @@ Pod::Spec.new do |s|
   s.source_files     = 'Classes/**/*'
 
   s.dependency 'Flutter'
-  s.dependency 'ObjectBox', '2.0.0'
+  s.dependency 'ObjectBox', '4.0.0'
 
   # Flutter.framework does not contain a i386 slice.
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386' }
diff --git a/flutter_libs/macos/objectbox_flutter_libs.podspec b/flutter_libs/macos/objectbox_flutter_libs.podspec
index 6b343bfc..ff872266 100644
--- a/flutter_libs/macos/objectbox_flutter_libs.podspec
+++ b/flutter_libs/macos/objectbox_flutter_libs.podspec
@@ -18,7 +18,7 @@ Pod::Spec.new do |s|
   s.source_files     = 'Classes/**/*'
 
   s.dependency 'FlutterMacOS'
-  s.dependency 'ObjectBox', '2.0.0'
+  s.dependency 'ObjectBox', '4.0.0'
 
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES' }
   s.swift_version = '5.3'
diff --git a/objectbox/CHANGELOG.md b/objectbox/CHANGELOG.md
index 17c93fa7..3ef87cc1 100644
--- a/objectbox/CHANGELOG.md
+++ b/objectbox/CHANGELOG.md
@@ -4,6 +4,8 @@
 * iOS: support `Query.findWithScores()`, previously would throw a
   `StorageException: Do not use vector-based find on 32 bit systems with big objects`. [#676](https://github.com/objectbox/objectbox-dart/issues/676)
 * Flutter for Linux/Windows, Dart Native: update to [objectbox-c 0.4.1](https://github.com/objectbox/objectbox-c/releases/tag/v0.4.1).
+* Flutter for iOS/macOS: update to [objectbox-swift 4.0.0](https://github.com/objectbox/objectbox-swift/releases/tag/v4.0.0).
+  Existing projects may have to run `pod repo update` and `pod update ObjectBox`.
 
 ## 4.0.2 (2024-08-14)
 
diff --git a/sync_flutter_libs/ios/objectbox_sync_flutter_libs.podspec b/sync_flutter_libs/ios/objectbox_sync_flutter_libs.podspec
index a93e2c69..8ee527c9 100644
--- a/sync_flutter_libs/ios/objectbox_sync_flutter_libs.podspec
+++ b/sync_flutter_libs/ios/objectbox_sync_flutter_libs.podspec
@@ -18,7 +18,7 @@ Pod::Spec.new do |s|
   s.source_files     = 'Classes/**/*'
 
   s.dependency 'Flutter'
-  s.dependency 'ObjectBox', '2.0.0-sync'
+  s.dependency 'ObjectBox', '4.0.0-sync'
 
   # Flutter.framework does not contain a i386 slice.
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386' }
diff --git a/sync_flutter_libs/macos/objectbox_sync_flutter_libs.podspec b/sync_flutter_libs/macos/objectbox_sync_flutter_libs.podspec
index 0c7d1275..b7cd5fc7 100644
--- a/sync_flutter_libs/macos/objectbox_sync_flutter_libs.podspec
+++ b/sync_flutter_libs/macos/objectbox_sync_flutter_libs.podspec
@@ -14,7 +14,7 @@ Pod::Spec.new do |s|
   s.source_files     = 'Classes/**/*'
 
   s.dependency 'FlutterMacOS'
-  s.dependency 'ObjectBox', '2.0.0-sync'
+  s.dependency 'ObjectBox', '4.0.0-sync'
 
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES' }
   s.swift_version = '5.3'