diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 5c562998..107fe35d 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        sdk: [2.12.0, dev]
+        sdk: [3.6.0-300.0.dev]
 
     steps:
       - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
diff --git a/built_value_generator/pubspec.yaml b/built_value_generator/pubspec.yaml
index 2f1173f4..345fe741 100644
--- a/built_value_generator/pubspec.yaml
+++ b/built_value_generator/pubspec.yaml
@@ -10,7 +10,7 @@ topics:
  - build-runner
 
 environment:
-  sdk: '>=3.6.0-edge <4.0.0'
+  sdk: '>=3.6.0-300.0.dev <4.0.0'
 
 dependencies:
   analyzer: '>=6.9.0 <7.0.0'