diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..71cdeea
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,10 @@
+# Set update schedule for GitHub Actions
+# See https://docs.github.com/en/github/administering-a-repository/keeping-your-actions-up-to-date-with-dependabot
+
+version: 2
+updates:
+
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    interval: "monthly"
diff --git a/.github/workflows/test-package.yml b/.github/workflows/test-package.yml
index 52cb01c..b40c641 100644
--- a/.github/workflows/test-package.yml
+++ b/.github/workflows/test-package.yml
@@ -22,8 +22,8 @@ jobs:
       matrix:
         sdk: [dev]
     steps:
-      - uses: actions/checkout@v2
-      - uses: dart-lang/setup-dart@v1.0
+      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+      - uses: dart-lang/setup-dart@6a218f2413a3e78e9087f638a238f6b40893203d
         with:
           sdk: ${{ matrix.sdk }}
       - id: install
@@ -45,8 +45,8 @@ jobs:
         os: [ubuntu-latest]
         sdk: [2.17.0, dev]
     steps:
-      - uses: actions/checkout@v2
-      - uses: dart-lang/setup-dart@v1.0
+      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+      - uses: dart-lang/setup-dart@6a218f2413a3e78e9087f638a238f6b40893203d
         with:
           sdk: ${{ matrix.sdk }}
       - id: install
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e07b83..dfafdae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,5 @@
+## 4.3.1-dev
+
 ## 4.3.0
 
 * Add support for adding more implementation in `enum` classes.
diff --git a/analysis_options.yaml b/analysis_options.yaml
index bf0f0b6..9d6246a 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -1,67 +1,46 @@
 include: package:lints/recommended.yaml
 
 analyzer:
-  strong-mode:
-    implicit-casts: false
-    implicit-dynamic: false
+  language:
+    strict-casts: true
+    strict-inference: true
+    strict-raw-types: true
 
 linter:
   rules:
-    # Error Rules
-    - comment_references
-    - control_flow_in_finally
-    - empty_statements
-    - hash_and_equals
-    - iterable_contains_unrelated_type
-    - list_remove_unrelated_type
-    - no_adjacent_strings_in_list
-    - test_types_in_equals
-    - throw_in_finally
-
-    # Style Rules
+    - always_declare_return_types
     - avoid_catching_errors
     - avoid_private_typedef_functions
     - avoid_redundant_argument_values
-    - avoid_renaming_method_parameters
-    - avoid_returning_null_for_void
     - avoid_unused_constructor_parameters
-    - await_only_futures
-    - camel_case_types
+    - cancel_subscriptions
     - cascade_invocations
-    - constant_identifier_names
+    - comment_references
     - directives_ordering
-    - file_names
-    - implementation_imports
     - join_return_with_assignment
     - lines_longer_than_80_chars
+    - literal_only_boolean_expressions
     - missing_whitespace_between_adjacent_strings
+    - no_adjacent_strings_in_list
     - no_runtimeType_toString
-    - non_constant_identifier_names
+    - omit_local_variable_types
     - only_throw_errors
-    - package_names
-    - package_prefixed_library_names
+    - package_api_docs
     - prefer_asserts_in_initializer_lists
     - prefer_const_constructors
     - prefer_const_declarations
     - prefer_expression_function_bodies
     - prefer_final_locals
-    - prefer_function_declarations_over_variables
-    - prefer_initializing_formals
-    - prefer_inlined_adds
-    - prefer_interpolation_to_compose_strings
-    - prefer_is_not_operator
-    - prefer_null_aware_operators
     - prefer_relative_imports
-    - prefer_typing_uninitialized_variables
-    - prefer_void_to_null
-    - provide_deprecation_message
+    - prefer_single_quotes
     - sort_pub_dependencies
-    - unnecessary_brace_in_string_interps
+    - test_types_in_equals
+    - throw_in_finally
+    - type_annotate_public_apis
+    - unawaited_futures
+    - unnecessary_await_in_return
     - unnecessary_lambdas
-    - unnecessary_null_aware_assignments
-    - unnecessary_overrides
     - unnecessary_parenthesis
     - unnecessary_statements
-    - unnecessary_string_interpolations
     - use_string_buffers
-    - void_checks
+    - use_super_parameters
diff --git a/lib/src/matchers.dart b/lib/src/matchers.dart
index 11d3d6d..0cdf739 100644
--- a/lib/src/matchers.dart
+++ b/lib/src/matchers.dart
@@ -55,8 +55,8 @@ class EqualsDart extends Matcher {
   Description describeMismatch(
     covariant Spec item,
     Description mismatchDescription,
-    matchState,
-    verbose,
+    Map<dynamic, dynamic> matchState,
+    bool verbose,
   ) {
     final actualSource = _dart(item, _emitter);
     return equals(_expectedSource).describeMismatch(
@@ -68,6 +68,6 @@ class EqualsDart extends Matcher {
   }
 
   @override
-  bool matches(covariant Spec item, matchState) =>
+  bool matches(covariant Spec item, Object? matchState) =>
       _dart(item, _emitter) == _expectedSource;
 }
diff --git a/pubspec.yaml b/pubspec.yaml
index cfb77c6..d24b165 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: code_builder
-version: 4.3.0
+version: 4.3.1-dev
 description: >-
   A fluent, builder-based library for generating valid Dart code
 repository: https://github.com/dart-lang/code_builder
@@ -19,6 +19,6 @@ dev_dependencies:
   build_runner: ^2.0.3
   built_value_generator: ^8.0.0
   dart_style: ^2.0.0
-  lints: ^1.0.0
+  lints: ^2.0.0
   source_gen: ^1.0.0
   test: ^1.16.0