diff --git a/.laminas-ci.json b/.laminas-ci.json
index 18707e2..6238f6f 100644
--- a/.laminas-ci.json
+++ b/.laminas-ci.json
@@ -1,3 +1,6 @@
 {
+    "ignore_php_platform_requirements": {
+        "8.4": true
+    },
     "backwardCompatibilityCheck": true
 }
diff --git a/composer.json b/composer.json
index 51fdaaf..9be4d05 100644
--- a/composer.json
+++ b/composer.json
@@ -33,7 +33,7 @@
         }
     },
     "require": {
-        "php": "~8.1.0 || ~8.2.0 || ~8.3.0",
+        "php": "~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
         "ext-json": "*",
         "dflydev/fig-cookies": "^3.0",
         "psr/container": "^1.0 || ^2.0",
@@ -41,10 +41,10 @@
     },
     "require-dev": {
         "laminas/laminas-coding-standard": "~2.5.0",
-        "laminas/laminas-diactoros": "^3.3.0",
-        "phpunit/phpunit": "^10.5.10",
+        "laminas/laminas-diactoros": "^3.4.0",
+        "phpunit/phpunit": "^10.5.36",
         "psalm/plugin-phpunit": "^0.19.0",
-        "vimeo/psalm": "^5.21.1"
+        "vimeo/psalm": "^5.26.1"
     },
     "suggest": {
         "mezzio/mezzio-csrf": "^1.0 || ^1.0-dev for CSRF protection capabilities",
diff --git a/composer.lock b/composer.lock
index 4e6b72a..7b6df8e 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "2b2a37b5135b770a9ee75f14386c068e",
+    "content-hash": "ca12f2a34dc589747b2e031fded10ada",
     "packages": [
         {
             "name": "dflydev/fig-cookies",
@@ -4359,14 +4359,14 @@
     ],
     "aliases": [],
     "minimum-stability": "stable",
-    "stability-flags": {},
+    "stability-flags": [],
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "~8.1.0 || ~8.2.0 || ~8.3.0",
+        "php": "~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
         "ext-json": "*"
     },
-    "platform-dev": {},
+    "platform-dev": [],
     "platform-overrides": {
         "php": "8.1.99"
     },
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index cdf04b9..3474ff4 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -7,10 +7,15 @@
         cacheDirectory=".phpunit.cache"
         displayDetailsOnTestsThatTriggerErrors="true"
         displayDetailsOnTestsThatTriggerDeprecations="true"
+        displayDetailsOnPhpunitDeprecations="true"
         displayDetailsOnTestsThatTriggerNotices="true"
         displayDetailsOnTestsThatTriggerWarnings="true"
         displayDetailsOnIncompleteTests="true"
         displayDetailsOnSkippedTests="true"
+        failOnPhpunitDeprecation="true"
+        failOnWarning="true"
+        failOnNotice="true"
+        failOnDeprecation="true"
 >
     <source>
         <include>
diff --git a/test/Persistence/CacheHeadersGeneratorTraitTest.php b/test/Persistence/CacheHeadersGeneratorTraitTest.php
index fb7b5a0..886d30d 100644
--- a/test/Persistence/CacheHeadersGeneratorTraitTest.php
+++ b/test/Persistence/CacheHeadersGeneratorTraitTest.php
@@ -250,12 +250,12 @@ private static function assertEqualDateWithDelta(string $expect, string $actual,
 
     /**
      * @return array<string, array{
-     *     cache_expire: int,
-     *     cache_limiter: string,
-     *     expected_expires: string,
-     *     expected_last_modified: string,
-     *     expected_cache_control: string,
-     *     expected_pragma: string,
+     *     cacheExpire: int,
+     *     cacheLimiter: string,
+     *     expectedExpires: string,
+     *     expectedLastModified: string,
+     *     expectedCacheControl: string,
+     *     expectedPragma: string,
      * }>
      */
     public static function provideCacheLimiterValues(): array
@@ -266,44 +266,44 @@ public static function provideCacheLimiterValues(): array
 
         return [
             'empty'     => [
-                'cache_expire'           => $cacheExpire,
-                'cache_limiter'          => '',
-                'expected_expires'       => '',
-                'expected_last_modified' => '',
-                'expected_cache_control' => '',
-                'expected_pragma'        => '',
+                'cacheExpire'          => $cacheExpire,
+                'cacheLimiter'         => '',
+                'expectedExpires'      => '',
+                'expectedLastModified' => '',
+                'expectedCacheControl' => '',
+                'expectedPragma'       => '',
             ],
             'not-valid' => [
-                'cache_expire'           => $cacheExpire,
-                'cache_limiter'          => 'not-valid',
-                'expected_expires'       => '',
-                'expected_last_modified' => '',
-                'expected_cache_control' => '',
-                'expected_pragma'        => '',
+                'cacheExpire'          => $cacheExpire,
+                'cacheLimiter'         => 'not-valid',
+                'expectedExpires'      => '',
+                'expectedLastModified' => '',
+                'expectedCacheControl' => '',
+                'expectedPragma'       => '',
             ],
             'nocache'   => [
-                'cache_expire'           => $cacheExpire,
-                'cache_limiter'          => 'nocache',
-                'expected_expires'       => Http::CACHE_PAST_DATE,
-                'expected_last_modified' => '',
-                'expected_cache_control' => 'no-store, no-cache, must-revalidate',
-                'expected_pragma'        => 'no-cache',
+                'cacheExpire'          => $cacheExpire,
+                'cacheLimiter'         => 'nocache',
+                'expectedExpires'      => Http::CACHE_PAST_DATE,
+                'expectedLastModified' => '',
+                'expectedCacheControl' => 'no-store, no-cache, must-revalidate',
+                'expectedPragma'       => 'no-cache',
             ],
             'public'    => [
-                'cache_expire'           => $cacheExpire,
-                'cache_limiter'          => 'public',
-                'expected_expires'       => gmdate(Http::DATE_FORMAT, time() + (60 * $cacheExpire)),
-                'expected_last_modified' => (string) $lastModified,
-                'expected_cache_control' => 'public, max-age=' . $maxAge,
-                'expected_pragma'        => '',
+                'cacheExpire'          => $cacheExpire,
+                'cacheLimiter'         => 'public',
+                'expectedExpires'      => gmdate(Http::DATE_FORMAT, time() + (60 * $cacheExpire)),
+                'expectedLastModified' => (string) $lastModified,
+                'expectedCacheControl' => 'public, max-age=' . $maxAge,
+                'expectedPragma'       => '',
             ],
             'private'   => [
-                'cache_expire'           => $cacheExpire,
-                'cache_limiter'          => 'private',
-                'expected_expires'       => Http::CACHE_PAST_DATE,
-                'expected_last_modified' => (string) $lastModified,
-                'expected_cache_control' => 'private, max-age=' . $maxAge,
-                'expected_pragma'        => '',
+                'cacheExpire'          => $cacheExpire,
+                'cacheLimiter'         => 'private',
+                'expectedExpires'      => Http::CACHE_PAST_DATE,
+                'expectedLastModified' => (string) $lastModified,
+                'expectedCacheControl' => 'private, max-age=' . $maxAge,
+                'expectedPragma'       => '',
             ],
         ];
     }