diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8dea263..8511a16 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,16 @@
 
 ## 0.4.0 (unreleased)
 
+### Improvement
+
+- Feat: Continuous watching on a specified config file and hot-reloading the file when updated
+- Feat: Enabled to specify TCP listen backlog in the config file
+- Refactor: Split `rpxy` into `rpxy-lib` and `rpxy-bin`
+- Refactor: lots of minor improvements
+
+### Bugfix
+
+- Fix bug to apply default backend application
 
 ## 0.3.0
 
diff --git a/TODO.md b/TODO.md
index 81af1d5..3425d11 100644
--- a/TODO.md
+++ b/TODO.md
@@ -10,7 +10,8 @@
     - upstream/upstream group: information on targeted destinations for each set of (a domain + a path)
     - load-balance: load balancing mod for a domain + path
 
-  - Split `rpxy` source codes into `rpxy-lib` and `rpxy-bin` to make the core part (reverse proxy) isolated from the misc part like toml file loader. This is in order to make the configuration-related part more flexible (related to [#33](https://github.com/junkurihara/rust-rpxy/issues/33))
+  - **Almost done in version 0.4.0**:
+    Split `rpxy` source codes into `rpxy-lib` and `rpxy-bin` to make the core part (reverse proxy) isolated from the misc part like toml file loader. This is in order to make the configuration-related part more flexible (related to [#33](https://github.com/junkurihara/rust-rpxy/issues/33))
 
 - Cache option for the response with `Cache-Control: public` header directive ([#55](https://github.com/junkurihara/rust-rpxy/issues/55))
 - Consideration on migrating from `quinn` and `h3-quinn` to other QUIC implementations ([#57](https://github.com/junkurihara/rust-rpxy/issues/57))