diff --git a/CHANGELOG.md b/CHANGELOG.md
index f139699..d9ebbaf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## 5.0.0
+
+- BREAKING: optimize exact diff calculation by trimming matching suffixes before running Myers. This keeps diffs minimal, but duplicate-heavy lists may now choose a different valid anchor/update position than 4.x.
+- Improve common diff performance by reusing typed-data buffers for k-lines/status arrays and interning larger non-aligned list diffs.
+- Add an AOT/JIT benchmark harness under `tool/bench/bench.dart`.
+- Add hash-collision regression tests for both update APIs.
+
 ## 4.0.1
 
 - fix endless loopi/wrong result in certain cases (#21, #18)
diff --git a/pubspec.yaml b/pubspec.yaml
index f9dd628..edf785e 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: diffutil_dart
 description: Calculate the difference between two lists as list of edit operations. Used for example for implicitly animating Flutter lists without having to maintain a StatefulWidget.
-version: 4.0.1
+version: 5.0.0
 homepage: https://github.com/knaeckeKami/diffutil.dart
 
 environment: