diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 3af23630..d1008e10 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        php: [8.1, 8.2, 8.3]
+        php: [8.1, 8.2, 8.3, 8.4]
         laravel: [10.*, 11.*]
         stability: [prefer-lowest, prefer-stable]
         os: [ubuntu-latest]
@@ -26,9 +26,15 @@ jobs:
             php: 8.3
             laravel: 11.*
             stability: prefer-stable
+          - os: windows-latest
+            php: 8.4
+            laravel: 11.*
+            stability: prefer-stable
         exclude:
           - php: 8.1
             laravel: 11.*
+          - php: 8.4
+            laravel: 10.*
 
     name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.stability }} - ${{ matrix.os }}
 
diff --git a/composer.json b/composer.json
index 2e157103..120c74af 100644
--- a/composer.json
+++ b/composer.json
@@ -22,11 +22,11 @@
         }
     },
     "require": {
-        "statamic/cms": "^5.0.0"
+        "statamic/cms": "^5.41"
     },
     "require-dev": {
-        "orchestra/testbench": "^8.0 || ^9.0",
-        "phpunit/phpunit": "^10.0",
+        "orchestra/testbench": "^8.28 || ^9.6.1",
+        "phpunit/phpunit": "^10.5.35",
         "laravel/pint": "^1.17"
     },
     "config": {