diff --git a/.fvm/fvm_config.json b/.fvm/fvm_config.json
index 27e33549..2f49d155 100644
--- a/.fvm/fvm_config.json
+++ b/.fvm/fvm_config.json
@@ -1,4 +1,4 @@
 {
-  "flutterSdkVersion": "3.7.12",
+  "flutterSdkVersion": "3.10.6",
   "flavors": {}
 }
\ No newline at end of file
diff --git a/slang/pubspec.yaml b/slang/pubspec.yaml
index 991cc477..01becbcb 100644
--- a/slang/pubspec.yaml
+++ b/slang/pubspec.yaml
@@ -1,6 +1,6 @@
 name: slang
 description: Localization / Internationalization (i18n) solution. Use JSON, YAML or CSV files to create typesafe translations via source generation.
-version: 3.20.0
+version: 3.21.0
 repository: https://github.com/slang-i18n/slang
 topics:
   - i18n
diff --git a/slang_build_runner/CHANGELOG.md b/slang_build_runner/CHANGELOG.md
index 1937dcea..1e2fa7c3 100644
--- a/slang_build_runner/CHANGELOG.md
+++ b/slang_build_runner/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 3.21.0
+
+- Bump `slang` to `3.21.0`
+
 ## 3.20.0
 
 - Bump `slang` to `3.20.0`
diff --git a/slang_build_runner/pubspec.yaml b/slang_build_runner/pubspec.yaml
index df4bebfb..1fcfd5c5 100644
--- a/slang_build_runner/pubspec.yaml
+++ b/slang_build_runner/pubspec.yaml
@@ -1,6 +1,6 @@
 name: slang_build_runner
 description: build_runner integration for slang. This library ensures that slang is recognized by build_runner.
-version: 3.20.0
+version: 3.21.0
 repository: https://github.com/slang-i18n/slang
 
 environment:
@@ -11,4 +11,4 @@ dependencies:
   glob: ^2.0.2
 
   # Use tight version to ensure that all features are available
-  slang: '>=3.20.0 <3.21.0'
+  slang: '>=3.21.0 <3.22.0'
diff --git a/slang_flutter/CHANGELOG.md b/slang_flutter/CHANGELOG.md
index 507a353b..ba719b04 100644
--- a/slang_flutter/CHANGELOG.md
+++ b/slang_flutter/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 3.21.0
+
+- fix: migrate away from deprecated `WidgetsBinding.instance.window` in `findDeviceLocale` implementation
+- Bump `slang` to `3.21.0`
+
 ## 3.20.0
 
 - Bump `slang` to `3.20.0`
diff --git a/slang_flutter/pubspec.yaml b/slang_flutter/pubspec.yaml
index 3f7fc0de..d4752868 100644
--- a/slang_flutter/pubspec.yaml
+++ b/slang_flutter/pubspec.yaml
@@ -1,6 +1,6 @@
 name: slang_flutter
 description: Flutter support for slang. This library provides helpful Flutter API.
-version: 3.20.0
+version: 3.21.0
 repository: https://github.com/slang-i18n/slang
 
 environment:
@@ -11,4 +11,4 @@ dependencies:
     sdk: flutter
 
   # Use tight version to ensure that all features are available
-  slang: '>=3.20.0 <3.21.0'
+  slang: '>=3.21.0 <3.22.0'