diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e02fa66..db37775 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,7 +27,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                php: ['7.2', '7.3', '7.4']
+                php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
                 coverage: [true]
                 composer-flags: ['']
                 include:
diff --git a/composer.json b/composer.json
index f6bd888..f686182 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
         "psr/simple-cache": "^1.0"
     },
     "require-dev": {
-        "laminas/laminas-diactoros": "^2.3",
+        "laminas/laminas-diactoros": "2.4.1",
         "phpstan/phpstan": "^0.12",
         "phpstan/phpstan-phpunit": "^0.12",
         "phpunit/phpunit": "^8.5",