diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index cd5f03c..f85a795 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -17,11 +17,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        sdk: [3.0.0, stable, beta]
+        sdk: [3.1, stable, beta]
 
     steps:
       - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
-      - uses: dart-lang/setup-dart@8a4b97ea2017cc079571daec46542f76189836b1
+      - uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d
         with:
           sdk: ${{ matrix.sdk }}
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4924517..11978f7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 4.0.0-wip
+
+- `core`:
+  - added `no_wildcard_variable_uses`
+- Updated the SDK lower-bound to 3.1.
+
 ## 3.0.0
 
 - `core`:
diff --git a/lib/core.yaml b/lib/core.yaml
index e986edc..990d753 100644
--- a/lib/core.yaml
+++ b/lib/core.yaml
@@ -22,6 +22,7 @@ linter:
     - hash_and_equals
     - implicit_call_tearoffs
     - no_duplicate_case_values
+    - no_wildcard_variable_uses
     - non_constant_identifier_names
     - null_check_on_nullable_type_parameter
     - package_prefixed_library_names
diff --git a/pubspec.yaml b/pubspec.yaml
index 647ffa7..6c02d5b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: lints
-version: 3.0.0
+version: 4.0.0-wip
 description: >
   Official Dart lint rules. Defines the 'core' and 'recommended' set of lints
   suggested by the Dart team.
@@ -10,7 +10,7 @@ topics:
   - lints
 
 environment:
-  sdk: ^3.0.0
+  sdk: ^3.1.0
 
 # NOTE: Code is not allowed in this package - do not add dependencies.
 # dependencies:
diff --git a/rules.md b/rules.md
index 70dee71..04e3921 100644
--- a/rules.md
+++ b/rules.md
@@ -21,6 +21,7 @@
 | [`hash_and_equals`](https://dart.dev/lints/hash_and_equals) | Always override `hashCode` if overriding `==`. | ✅ |
 | [`implicit_call_tearoffs`](https://dart.dev/lints/implicit_call_tearoffs) | Explicitly tear-off `call` methods when using an object as a Function. | ✅ |
 | [`no_duplicate_case_values`](https://dart.dev/lints/no_duplicate_case_values) | Don't use more than one case with same value. | ✅ |
+| [`no_wildcard_variable_uses`](https://dart.dev/lints/no_wildcard_variable_uses) | Don't use wildcard parameters or variables. |  |
 | [`non_constant_identifier_names`](https://dart.dev/lints/non_constant_identifier_names) | Name non-constant identifiers using lowerCamelCase. | ✅ |
 | [`null_check_on_nullable_type_parameter`](https://dart.dev/lints/null_check_on_nullable_type_parameter) | Don't use null check on a potentially nullable type parameter. | ✅ |
 | [`package_prefixed_library_names`](https://dart.dev/lints/package_prefixed_library_names) | Prefix library names with the package name and a dot-separated path. |  |