diff --git a/.github/actions/setup-php/action.yaml b/.github/actions/setup-php/action.yaml
index bc6efc7..fbb2153 100644
--- a/.github/actions/setup-php/action.yaml
+++ b/.github/actions/setup-php/action.yaml
@@ -4,7 +4,7 @@ inputs:
   php-version:
     description: 'PHP version to setup'
     required: false
-    default: '8.4'
+    default: '8.5'
   extensions:
     description: 'Comma-separated list of PHP extensions to install'
     required: false
@@ -12,13 +12,13 @@ inputs:
   tools:
     description: 'Comma-separated list of tools to install'
     required: false
-    default: composer:2.8.12, phan:5.5.1
+    default: composer:2.8.12, phan:6.0.0-beta
 
 runs:
   using: "composite"
   steps:
     - name: Setup PHP
-      uses: shivammathur/setup-php@bf6b4fbd49ca58e4608c9c89fba0b8d90bd2a39f # v2.35.5
+      uses: shivammathur/setup-php@44454db4f0199b8b9685a5d763dc37cbf79108e1 # v2.36.0
       with:
         php-version: ${{ inputs.php-version }}
         coverage: none
diff --git a/.phan/config.php b/.phan/config.php
index 723cf11..9782621 100644
--- a/.phan/config.php
+++ b/.phan/config.php
@@ -2,7 +2,7 @@
 declare(strict_types=1);
 
 return [
-    'target_php_version' => '8.4',
+    'target_php_version' => '8.5',
 
     'directory_list' => [
         'src',