diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 218393f..4cff5b9 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.4.1"
+  ".": "0.4.2"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 03e9eb9..ff9dd32 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [0.4.2](https://github.com/tsdevau/diff-commit/compare/diff-commit-v0.4.1...diff-commit-v0.4.2) (2026-08-08)
+
+
+### Documentation
+
+* **readme:** update references to Claude Sonnet 5 in README and package.json ([7766cb4](https://github.com/tsdevau/diff-commit/commit/7766cb493a117760798cede9428ec5a7b5854bf9))
+
+
+### DX Testing
+
+* **tests:** update all test files to use "claude-sonnet-5" as the default model ([d4b7f86](https://github.com/tsdevau/diff-commit/commit/d4b7f8699be612de40db0e76d86c99c2d5291726))
+
 ## [0.4.1](https://github.com/tsdevau/diff-commit/compare/diff-commit-v0.4.0...diff-commit-v0.4.1) (2026-08-08)
 
 
diff --git a/package-lock.json b/package-lock.json
index 91adacd..0b77a8e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "diff-commit",
-  "version": "0.4.1",
+  "version": "0.4.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "diff-commit",
-      "version": "0.4.1",
+      "version": "0.4.2",
       "license": "MIT",
       "dependencies": {
         "@anthropic-ai/sdk": "^0.39.0",
diff --git a/package.json b/package.json
index 2c425e9..601ae8c 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "diff-commit",
   "displayName": "Diff Commit",
-  "version": "0.4.1",
+  "version": "0.4.2",
   "description": "Generate detailed Git commit messages following the conventional commit specification using AI models. Choose between Anthropic's cloud-based models like Claude Sonnet 5 or local Ollama models for offline usage.",
   "categories": [
     "AI",