diff --git a/tool/update.sh b/tool/update.sh
new file mode 100755
index 00000000..c62dc8d2
--- /dev/null
+++ b/tool/update.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+set -euxo pipefail
+cd "$(dirname "$0")/.."
+
+if [[ "$1" == "flutter" ]]; then
+  flutter_channel="stable"
+  flutter_version="$(curl https://raw.githubusercontent.com/fluttertools/fvm/main/releases_linux.json | jq -r "[.releases[] | select(.channel==\"$flutter_channel\")][0].version")"
+  yes | fvm use --force "$flutter_version@$flutter_channel" || true
+  dart_version="$(fvm flutter --version --machine | jq -r ".dartSdkVersion")"
+  dart_version_major="$(echo "$dart_version" | cut -d "." -f 1)"
+  dart_version_minor="$(echo "$dart_version" | cut -d "." -f 2)"
+  dart_version_next_major=$(( dart_version_major + 1 ))
+  sed -i "s/flutter-version: '.*'/flutter-version: '$flutter_version'/" .github/workflows/fdroid-nightly.yaml
+  sed -i "s/channel: '.*'/channel: '$flutter_channel'/" .github/workflows/fdroid-nightly.yaml
+  find ./packages -name "pubspec.yaml" -exec sed -i "s/flutter: '>=.*'/flutter: '>=$flutter_version'/" {} \;
+  find ./packages -name "pubspec.yaml" -exec sed -i "s/sdk: '>=.* <.*'/sdk: '>=$dart_version_major.$dart_version_minor.0 <$dart_version_next_major.0.0'/" {} \;
+  fvm exec mono_repo pub get
+else
+  echo "$1 not found"
+  exit 1
+fi
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