diff --git a/CHANGELOG.md b/CHANGELOG.md
index 10f8ae7c..969e9a25 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,32 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+This release implements a mechanism to automatically track the latest version of the tool on our end. ([#27](https://github.com/taiki-e/install-action/pull/27))
+Hopefully, this will avoid situations such as "new version of the tool has been released, but the maintainer has not been aware of it for a number of months".
+This also makes it easier to add support for new tools.
+
+This release also includes the following improvements:
+
+- Verify SHA256 checksums for downloaded files in all tools installed from GH releases. ([#27](https://github.com/taiki-e/install-action/pull/27))
+
+- Support omitting the patch/minor version in all tools installed from GH releases. ([#27](https://github.com/taiki-e/install-action/pull/27))
+
+  For example:
+
+  ```yaml
+  - uses: taiki-e/install-action@v2
+    with:
+      tool: cargo-hack@0.5
+  ```
+
+  You can also omit the minor version if the major version of tool is 1 or greater.
+
+- Support `just`. ([#34](https://github.com/taiki-e/install-action/pull/34))
+
+- Support `dprint`. ([#34](https://github.com/taiki-e/install-action/pull/34))
+
+Note: This release is considered a breaking change because installing on versions not yet recognized by the action or on pre-release versions will no longer work with this release. (They were never officially supported, but they could work before.) Please submit an issue if you need these supports again.
+
 ## [1.17.3] - 2022-12-22
 
 - Update `wasmtime@latest` to 4.0.0.
diff --git a/README.md b/README.md
index 4d1f3712..4079e041 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ GitHub Action for installing development tools (mainly from GitHub Releases).
 ### Example workflow
 
 ```yaml
-- uses: taiki-e/install-action@v1
+- uses: taiki-e/install-action@v2
   with:
     tool: cargo-hack
 ```
@@ -39,15 +39,24 @@ You can use the shorthand (if you do not need to pin the versions of this action
 To install a specific version, use `@version` syntax:
 
 ```yaml
-- uses: taiki-e/install-action@v1
+- uses: taiki-e/install-action@v2
   with:
     tool: cargo-hack@0.5.24
 ```
 
+You can also omit patch version.
+(You can also omit the minor version if the major version is 1 or greater.)
+
+```yaml
+- uses: taiki-e/install-action@v2
+  with:
+    tool: cargo-hack@0.5
+```
+
 To install multiple tools:
 
 ```yaml
-- uses: taiki-e/install-action@v1
+- uses: taiki-e/install-action@v2
   with:
     tool: cargo-hack,cargo-minimal-versions
 ```