diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 8591699a..e29d5e21 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -29,7 +29,8 @@ jobs:
       - id: checkout
         uses: actions/checkout@v3
         with:
-          ref: ${{ github.event.pull_request.base.ref }}
+          fetch-depth: 2
+      - run: git checkout HEAD^
       - name: Load base version
         id: load_base_version
         run: |
diff --git a/chopper_generator/lib/src/generator.dart b/chopper_generator/lib/src/generator.dart
index cce54040..72635a75 100644
--- a/chopper_generator/lib/src/generator.dart
+++ b/chopper_generator/lib/src/generator.dart
@@ -457,6 +457,7 @@ class ChopperGenerator extends GeneratorForAnnotation<chopper.ChopperApi> {
         _typeChecker(Map).isExactlyType(type) ||
         _typeChecker(BuiltMap).isExactlyType(type)) return type;
 
+    // ignore: deprecated_member_use
     if (generic.isDynamic) return null;
 
     if (_typeChecker(List).isExactlyType(type) ||