diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4fab42a20..43e5b0f27 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,18 +9,20 @@ jobs:
   check-format:
       name: Check format using flutter format
       runs-on: ubuntu-latest
-      container: cirrusci/flutter:stable
+      container:
+        image: ghcr.io/cirruslabs/flutter:latest
 
       steps:
         - name: Checkout code
           uses: actions/checkout@v2
         - name: Check format
-          run: flutter format -n --set-exit-if-changed .
+          run: dart format -n --set-exit-if-changed .
 
   lint:
     name: Lint
     runs-on: ubuntu-latest
-    container: cirrusci/flutter:stable
+    container:
+      image: ghcr.io/cirruslabs/flutter:latest
 
     steps:
       - name: Checkout code
@@ -34,7 +36,8 @@ jobs:
 #  test:
 #    name: Test
 #    runs-on: ubuntu-latest
-#    container: cirrusci/flutter:stable
+#    container:
+#      image: ghcr.io/cirruslabs/flutter:latest
 #
 #    steps:
 #      - name: Checkout code
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index eb611c3d6..243f8fc4f 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -4,7 +4,7 @@ version: 1.0.0+1
 publish_to: none
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: ">=3.1.3 <4.0.0"
 
 dependencies:
   threadable_better_player:
@@ -24,4 +24,4 @@ dev_dependencies:
 flutter:
   assets:
     - assets/
-  uses-material-design: true
\ No newline at end of file
+  uses-material-design: true