diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 348385e..4f9215f 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -10,15 +10,13 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest]
         php: [7.3, 7.4]
-        laravel: [6.*, 7.*, 8.*]
+        laravel: [7.*, 8.*]
         dependency-version: [prefer-lowest, prefer-stable]
         include:
           - laravel: 8.*
             testbench: 6.*
           - laravel: 7.*
             testbench: 5.*
-          - laravel: 6.*
-            testbench: 4.*
 
     name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.dependency-version }} - ${{ matrix.os }}
 
diff --git a/composer.json b/composer.json
index 059a751..ae84b72 100644
--- a/composer.json
+++ b/composer.json
@@ -19,8 +19,8 @@
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.16",
-        "orchestra/testbench": "^4.0|^5.0|^6.0",
-        "phpunit/phpunit": "^8.0|^9.0",
+        "orchestra/testbench": "^5.0|^6.0",
+        "phpunit/phpunit": "^9.0",
         "psalm/plugin-laravel": "^1.4",
         "vimeo/psalm": "^3.11"
     },