diff --git a/.github/workflows/dart.yml b/.github/workflows/dart.yml
index c1222fb..0cb22d2 100644
--- a/.github/workflows/dart.yml
+++ b/.github/workflows/dart.yml
@@ -15,7 +15,7 @@ jobs:
     steps:
     # Set up Flutter.
     - name: Clone Flutter repository with master channel
-      uses: subosito/flutter-action@v2.19.0
+      uses: subosito/flutter-action@v2.21.0
       with:
         channel: master
     - run: flutter doctor -v