diff --git a/.envrc b/.envrc
index e52db4a..197c0d5 100644
--- a/.envrc
+++ b/.envrc
@@ -1,4 +1,3 @@
 #!/bin/bash
 
-nix_direnv_watch_file .ruby-version
 use flake
diff --git a/.github/renovate.json b/.github/renovate.json
deleted file mode 100644
index ac50464..0000000
--- a/.github/renovate.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "dependencyDashboard": true,
-  "labels": ["dependencies", "renovate"],
-  "enabledManagers": ["nix", "ruby-version"],
-  "nix": {
-    "enabled": true
-  }
-}
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index c09cb9f..3ccb07b 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -14,16 +14,14 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dprint/check@v2.2
         with:
-          # Keep same version as used in *.nix
-          dprint-version: '0.40.0'
+          dprint-version: '0.40.0' # selfup { "regex": "\\d[^']+", "script": "dprint --version | cut -d ' ' -f 2" }
 
   typos:
     timeout-minutes: 15
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      # Keep same version as used in *.nix
-      - uses: crate-ci/typos@v1.16.4
+      - uses: crate-ci/typos@v1.16.4 # selfup { "regex": "\\d\\.\\d+\\.\\d+", "script": "typos --version | cut -d ' ' -f 2" }
         with:
           files: |
             .
diff --git a/.github/workflows/update-nixpkgs-and-versions-in-ci.yml b/.github/workflows/update-nixpkgs-and-versions-in-ci.yml
new file mode 100644
index 0000000..c706d0a
--- /dev/null
+++ b/.github/workflows/update-nixpkgs-and-versions-in-ci.yml
@@ -0,0 +1,23 @@
+name: Update nixpkgs and CI dependencies
+on:
+  pull_request:
+    paths:
+      - '.github/workflows/update-nixpkgs-and-versions-in-ci.yml'
+  schedule:
+    # Every Monday 10:17 JST
+    # https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#schedule
+    - cron: '17 1 * * 1'
+  workflow_dispatch:
+
+jobs:
+  update-nixpkgs:
+    uses: kachick/anylang-template/.github/workflows/reusable-update-nixpkgs-and-versions-in-ci.yml@2413fce002263e6675ce084da251be0dbbe2a8fc
+    if: (github.event.sender.login == 'kachick') || (github.event_name != 'pull_request')
+    with:
+      dry-run: ${{ github.event_name == 'pull_request' }}
+      optional-run: |
+        ruby -e 'puts RUBY_VERSION' > .ruby-version
+        git diff-index --quiet HEAD || git commit -m 'Update .ruby-version' .ruby-version
+    secrets:
+      APP_ID: ${{ secrets.APP_ID }}
+      APP_PRIVATE_KEY: ${{ secrets.APP_PRIVATE_KEY }}
diff --git a/flake.lock b/flake.lock
index b3858c4..369140c 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,21 +1,5 @@
 {
   "nodes": {
-    "flake-compat": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1673956053,
-        "narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
-        "type": "github"
-      },
-      "original": {
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "type": "github"
-      }
-    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -34,21 +18,6 @@
         "type": "github"
       }
     },
-    "flake-utils_2": {
-      "locked": {
-        "lastModified": 1667395993,
-        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1691899779,
@@ -65,33 +34,10 @@
         "type": "github"
       }
     },
-    "nixpkgs-ruby": {
-      "inputs": {
-        "flake-compat": "flake-compat",
-        "flake-utils": "flake-utils_2",
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1689399615,
-        "narHash": "sha256-7Fn99K+dgkip3RtXx4S2btOuSnu+PRtQ+oEI0MFYNXA=",
-        "owner": "bobvanderlinden",
-        "repo": "nixpkgs-ruby",
-        "rev": "9bdc21ccaeae6fdacd48eafa4c5cd520b90c07b7",
-        "type": "github"
-      },
-      "original": {
-        "owner": "bobvanderlinden",
-        "repo": "nixpkgs-ruby",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
         "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs",
-        "nixpkgs-ruby": "nixpkgs-ruby"
+        "nixpkgs": "nixpkgs"
       }
     },
     "systems": {
diff --git a/flake.nix b/flake.nix
index 9d3a502..69fa8aa 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,19 +6,13 @@
     # How to update the revision
     #   - `nix flake update --commit-lock-file` # https://nixos.org/manual/nix/stable/command-ref/new-cli/nix3-flake-update.html
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    nixpkgs-ruby.url = "github:bobvanderlinden/nixpkgs-ruby";
-    nixpkgs-ruby.inputs.nixpkgs.follows = "nixpkgs";
     flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, nixpkgs-ruby, flake-utils }:
+  outputs = { self, nixpkgs, flake-utils }:
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
-        ruby = nixpkgs-ruby.lib.packageFromRubyVersionFile {
-          file = ./.ruby-version;
-          inherit system;
-        };
       in
       {
         devShells.default = with pkgs;
@@ -28,7 +22,7 @@
               # https://github.com/kachick/dotfiles/pull/228
               bashInteractive
 
-              ruby
+              ruby_3_2
               # Required to build psych via irb dependency
               # https://github.com/kachick/irb-power_assert/issues/116
               # https://github.com/ruby/irb/pull/648