diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1857535..39a0c1c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,14 +13,14 @@ jobs:
       - name: install dependencies
         run: sudo apt update -qq && sudo apt -y install libxml2-utils
       - name: Check out repository code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Install PHP
         uses: shivammathur/setup-php@v2
         with:
           php-version: '7.4'
           coverage: 'none'
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: '~/.cache/composer'
           key: "cache-composer-${{ hashFiles('composer.json') }}"
@@ -45,6 +45,8 @@ jobs:
           - 7.4
           - 8.0
           - 8.1
+          - 8.2
+          - 8.3
         dependencies_level:
           - --prefer-lowest
           - ""
@@ -60,29 +62,29 @@ jobs:
           git config --global core.autocrlf false
           git config --global core.eol lf
       - name: Check out repository code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Install PHP
         uses: shivammathur/setup-php@v2
         with:
           coverage: 'xdebug'
           php-version: ${{ matrix.php_version }}
-          extensions: ast-1.0.14
+          extensions: ast-1.1.1
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: '~/.cache/composer'
           key: "cache-composer-${{ hashFiles('composer.json') }}"
           restore-keys: 'cache-composer-'
       - name: Run composer
-        if: ${{ matrix.php_version != '8.0' && matrix.php_version != '8.1' }}
+        if: ${{ matrix.php_version != '8.0' && matrix.php_version != '8.1' && matrix.php_version != '8.2' && matrix.php_version != '8.3' }}
         run: composer update ${{ matrix.dependencies_level }} --prefer-dist --no-interaction --no-progress
       - name: Run composer with workaround for PHP 8 and incompatible PHPUnit
-        if: ${{ matrix.php_version == '8.0' || matrix.php_version == '8.1' }}
+        if: ${{ matrix.php_version == '8.0' || matrix.php_version == '8.1' || matrix.php_version == '8.2' || matrix.php_version == '8.3' }}
         run: composer update ${{ matrix.dependencies_level }} --ignore-platform-reqs --prefer-dist --no-interaction --no-progress
       - name: Check composer.json
         run: composer normalize --dry-run
       - name: Run tests with coverage
-        if: ${{ matrix.php_version != '8.0' && matrix.php_version != '8.1' }}
+        if: ${{ matrix.php_version != '8.0' && matrix.php_version != '8.1' && matrix.php_version != '8.2' && matrix.php_version != '8.3' }}
         run: php vendor/bin/phpunit --coverage-clover=coverage.xml
       - name: Run tests
         if: ${{ matrix.php_version == '8.0' }}
@@ -95,11 +97,17 @@ jobs:
       - name: Run PHPStan
         run: vendor/bin/phpstan analyse --no-progress
       - name: Run psalm
+        if: ${{ matrix.os != 'windows-latest' }}
         run: vendor/bin/psalm --show-info=true
       - name: Run phan
+        if: ${{ matrix.os != 'windows-latest' }}
         run: vendor/bin/phan
+      # AST 1.1 binary for Windows seems to be missing on PECL
+      - name: Run phan with polyfill
+        if: ${{ matrix.os == 'windows-latest' }}
+        run: vendor/bin/phan --allow-polyfill-parser
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v2
+        uses: codecov/codecov-action@v3
         with:
           verbose: true
 
@@ -108,10 +116,10 @@ jobs:
     if: always()
     runs-on: ubuntu-latest
     steps:
-      - uses: technote-space/workflow-conclusion-action@v2
+      - uses: technote-space/workflow-conclusion-action@v3
       - name: Post to a Slack channel
         id: slack
-        uses: slackapi/slack-github-action@v1.17.0
+        uses: slackapi/slack-github-action@v1.23.0
         with:
           # Slack channel id, channel name, or user id to post message.
           # See also: https://api.slack.com/methods/chat.postMessage#channels
diff --git a/README.md b/README.md
index 29938a6..1f6f40e 100644
--- a/README.md
+++ b/README.md
@@ -144,7 +144,7 @@ If `phpcs` complains that MO4 is not installed, please check the installed codin
 
 ## Dependencies
 
-* [PHP CodeSniffer](https://github.com/squizlabs/PHP_CodeSniffer)
+* [PHP CodeSniffer](https://github.com/phpcsstandards/PHP_CodeSniffer)
 * [David Joos's Symfony Coding Standard](https://github.com/djoos/Symfony-coding-standard)
 * [Composer installer for PHP_CodeSniffer coding standards](https://github.com/DealerDirect/phpcodesniffer-composer-installer)
 * [Slevomat Coding Standard](https://github.com/slevomat/coding-standard)
diff --git a/composer.json b/composer.json
index 1017d36..ad74497 100644
--- a/composer.json
+++ b/composer.json
@@ -31,12 +31,12 @@
     },
     "require-dev": {
         "ergebnis/composer-normalize": ">=2.19 <2.30",
-        "phan/phan": "^5.1.0",
+        "phan/phan": "^5.4.2",
         "phpstan/phpstan": "^1.0",
         "phpstan/phpstan-strict-rules": "^1.0",
         "phpunit/phpunit": "^7.0",
-        "psalm/plugin-phpunit": "^0.17",
-        "vimeo/psalm": "^4.5.2"
+        "psalm/plugin-phpunit": "^0.18",
+        "vimeo/psalm": "^4.30"
     },
     "config": {
         "allow-plugins": {