diff --git a/lib/src/third_party/tar/CHANGELOG.md b/lib/src/third_party/tar/CHANGELOG.md
index 50b4c7ee9..590a70db0 100644
--- a/lib/src/third_party/tar/CHANGELOG.md
+++ b/lib/src/third_party/tar/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.1
+
+- Fix an incompatibility with Dart 3.1.
+
 ## 1.0.0
 
 - __Breaking__ Add class modifiers where applicable.
diff --git a/lib/src/third_party/tar/lib/src/writer.dart b/lib/src/third_party/tar/lib/src/writer.dart
index 17cab90d6..24f919083 100644
--- a/lib/src/third_party/tar/lib/src/writer.dart
+++ b/lib/src/third_party/tar/lib/src/writer.dart
@@ -156,7 +156,7 @@ enum OutputFormat {
   gnuLongName,
 }
 
-final class _WritingSink extends StreamSink<TarEntry> {
+final class _WritingSink implements StreamSink<TarEntry> {
   final StreamSink<List<int>> _output;
   final _SynchronousTarSink _synchronousWriter;
   bool _closed = false;
@@ -273,7 +273,7 @@ final class _SynchronousTarConverter
   }
 }
 
-final class _SynchronousTarSink extends Sink<SynchronousTarEntry> {
+final class _SynchronousTarSink implements Sink<SynchronousTarEntry> {
   final OutputFormat _format;
   final Sink<List<int>> _output;
 
diff --git a/lib/src/third_party/tar/vendored-pubspec.yaml b/lib/src/third_party/tar/vendored-pubspec.yaml
index 3164d3951..5d641aa14 100644
--- a/lib/src/third_party/tar/vendored-pubspec.yaml
+++ b/lib/src/third_party/tar/vendored-pubspec.yaml
@@ -1,6 +1,6 @@
 name: tar
 description: Memory-efficient, streaming implementation of the tar file format
-version: 1.0.0
+version: 1.0.1
 repository: https://github.com/simolus3/tar/
 
 environment:
diff --git a/lib/src/third_party/vendor-state.yaml b/lib/src/third_party/vendor-state.yaml
index 4c76e4c8c..62b5a3242 100644
--- a/lib/src/third_party/vendor-state.yaml
+++ b/lib/src/third_party/vendor-state.yaml
@@ -18,7 +18,7 @@ config:
         - analysis_options.yaml
     tar:
       package: tar
-      version: 1.0.0
+      version: 1.0.1
       import_rewrites: {}
       include:
         - pubspec.yaml
diff --git a/vendor.yaml b/vendor.yaml
index 88f407b98..068dae661 100644
--- a/vendor.yaml
+++ b/vendor.yaml
@@ -7,4 +7,4 @@ vendored_dependencies:
     version: 2.0.1
   tar:
     package: tar
-    version: 1.0.0
+    version: 1.0.1