diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0949abb..3f7ea76 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -47,7 +47,7 @@ jobs:
       matrix:
         # Add macos-latest and/or windows-latest if relevant for this package.
         os: [ubuntu-latest]
-        sdk: [3.0, dev]
+        sdk: [3.4, dev]
     steps:
       - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
       - uses: dart-lang/setup-dart@0a8a0fc875eb934c15d08629302413c671d3f672
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d70ac51..afe767d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## 0.12.17-wip
 
+* Require Dart 3.4
+
 ## 0.12.16+1
 
 * Require Dart 3.0
diff --git a/pubspec.yaml b/pubspec.yaml
index 90ce546..938a18a 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -6,7 +6,7 @@ description: >-
 repository: https://github.com/dart-lang/matcher
 
 environment:
-  sdk: ^3.0.0
+  sdk: ^3.4.0
 
 dependencies:
   async: ^2.10.0