diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4ac71d6..8ae6efa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+# [0.4.0](https://github.com/prefabs-tech/tools/compare/v0.3.0...v0.4.0) (2026-02-05)
+
+
+### Features
+
+* migrate fastify / typescript eslint config to v9 (flat config) ([#36](https://github.com/prefabs-tech/tools/issues/36)) ([278283f](https://github.com/prefabs-tech/tools/commit/278283f3a0c03329ff0b7cdbebbba1140ce07fe3))
+
+
+
 # [0.3.0](https://github.com/prefabs-tech/tools/compare/v0.2.1...v0.3.0) (2026-02-04)
 
 
diff --git a/package.json b/package.json
index b62a797..e183b7f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@prefabs.tech/tools",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "private": true,
   "homepage": "https://github.com/prefabs-tech/tools#readme",
   "repository": {
diff --git a/packages/eslint-config/package.json b/packages/eslint-config/package.json
index 933b794..08e07cc 100644
--- a/packages/eslint-config/package.json
+++ b/packages/eslint-config/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@prefabs.tech/eslint-config",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "ESLint config",
   "homepage": "https://github.com/prefabs-tech/tools/tree/main/packages/eslint-config#readme",
   "repository": {
@@ -49,4 +49,4 @@
   "publishConfig": {
     "access": "public"
   }
-}
\ No newline at end of file
+}
diff --git a/packages/tsconfig/package.json b/packages/tsconfig/package.json
index 8a0c36e..b8cb095 100644
--- a/packages/tsconfig/package.json
+++ b/packages/tsconfig/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@prefabs.tech/tsconfig",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "Typescript configuration",
   "homepage": "https://github.com/prefabs-tech/tools/tree/main/packages/tsconfig#readme",
   "repository": {