diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 8b0baba71..21f921d48 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -2,6 +2,17 @@
 
 This section contains past updates we've sent to customers via Discord.
 
+## 0.21.0 (January 2, 2024)
+
+- ⬆️ Updated to Flutter 3.16.5
+- 🩹 Fixed iOS patch support for x64 Macs.
+
+📚 Release notes can be found at https://github.com/shorebirdtech/shorebird/releases/tag/v0.21.0
+
+As always, you can upgrade using `shorebird upgrade`
+
+Please let us know if we can help!
+
 ## 0.20.0 (December 20, 2023)
 
 - New Dart VM "mixed-mode" is now enabled by default on iOS.
diff --git a/packages/shorebird_cli/lib/src/version.dart b/packages/shorebird_cli/lib/src/version.dart
index 8a8bc067c..89785059f 100644
--- a/packages/shorebird_cli/lib/src/version.dart
+++ b/packages/shorebird_cli/lib/src/version.dart
@@ -1,2 +1,2 @@
 // Generated code. Do not modify.
-const packageVersion = '0.20.0';
+const packageVersion = '0.21.0';
diff --git a/packages/shorebird_cli/pubspec.yaml b/packages/shorebird_cli/pubspec.yaml
index 656d01ef4..7626d546d 100644
--- a/packages/shorebird_cli/pubspec.yaml
+++ b/packages/shorebird_cli/pubspec.yaml
@@ -1,6 +1,6 @@
 name: shorebird_cli
 description: Command-line tool to interact with Shorebird's services.
-version: 0.20.0
+version: 0.21.0
 repository: https://github.com/shorebirdtech/shorebird
 
 publish_to: none