diff --git a/README.md b/README.md
index e4b103d7..5fc0a18e 100644
--- a/README.md
+++ b/README.md
@@ -111,7 +111,7 @@ See the [Supported tools section](#supported-tools) for how to ensure that fallb
 
 This action has been tested for GitHub-hosted runners (Ubuntu, macOS, Windows) and containers (Ubuntu, Debian, Fedora, CentOS, Alma, openSUSE, Arch, Alpine).
 
-On Linux, if any required tools are missing, this action will attempt to install them from distro's package manager, so no pre-setup is usually required (except for CentOS or Debian 9 (or older) or very old distro described below, which was already EoL and needs to use vault/archive repos -- see "Install requirements" in [our CI config](https://github.com/taiki-e/install-action/blob/HEAD/.github/workflows/ci.yml) for example of setup).
+On Linux, if any required tools are missing, this action will attempt to install them from distro's package manager, so no pre-setup is usually required (except for CentOS or Debian 10 (or older) or very old distro described below, which was already EoL and needs to use vault/archive repos -- see "Install requirements" in [our CI config](https://github.com/taiki-e/install-action/blob/HEAD/.github/workflows/ci.yml) for example of setup).
 
 On other platforms, at least the following tools are required: