diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 9b879fbd..d64b410e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,11 +14,6 @@ jobs:
   feature:
     runs-on: ubuntu-latest
 
-    strategy:
-      fail-fast: false
-      matrix:
-        php: ['8.4', '8.5']
-
     steps:
       - name: Checkout code
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
@@ -28,7 +23,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # v2
         with:
-          php-version: ${{ matrix.php }}
+          php-version: '8.5'
           tools: composer:v2
           coverage: none
 
@@ -45,7 +40,6 @@ jobs:
           npm ci
 
       - name: Check formatting
-        if: matrix.php == '8.5'
         run: vendor/bin/pint --test
 
       - name: Run feature tests
diff --git a/README.md b/README.md
index b6b8d985..ec80483c 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ No JavaScript libraries beyond the Alpine that ships with Livewire. Browsers: Ch
 
 ## Requirements
 
-PHP 8.4+, Laravel 13, Livewire 4, Vite, and Node (for `material:scheme`).
+PHP 8.5+, Laravel 13, Livewire 4, Vite, and Node (for `material:scheme`).
 
 ## Installation
 
diff --git a/UPGRADE.md b/UPGRADE.md
index fde1f3a1..0d484747 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -1,5 +1,11 @@
 # Upgrading
 
+## From 2.2.0 to 2.3.0
+
+- **PHP 8.5 is required.** Composer refuses to install the package on 8.4. Nothing in the package's
+  code needs 8.5 — 2.2.0 runs on 8.4 and stays available for an application still on it — but the
+  package is now built and tested against one runtime rather than two.
+
 ## From 2.1.0 to 2.2.0
 
 - **Run `php artisan view:clear` after upgrading.** The components are no longer registered under a
diff --git a/composer.json b/composer.json
index c40a8f3e..88572d12 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
         }
     ],
     "require": {
-        "php": "^8.4",
+        "php": "^8.5",
         "laravel/framework": "^13.0",
         "livewire/livewire": "^4.0"
     },