diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 921d3ff9..0a19b338 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,7 +24,6 @@ jobs:
           - "highest"
           - "locked"
         php-version:
-          - "8.3"
           - "8.4"
           - "8.5"
 
@@ -39,7 +38,7 @@ jobs:
           ini-values: memory_limit=-1
 
       - name: "Update Composer platform version"
-        if: ${{ matrix.dependencies != 'locked' && matrix.php-version != '8.3' }}
+        if: ${{ matrix.dependencies != 'locked' && matrix.php-version != '8.4' }}
         shell: bash
         run: "composer config platform.php ${{ matrix.php-version }}"
 
@@ -58,7 +57,7 @@ jobs:
         run: "composer lint"
 
       - name: "Run coding style"
-        if: ${{ matrix.dependencies == 'locked' && matrix.php-version == '8.3' }}
+        if: ${{ matrix.dependencies == 'locked' && matrix.php-version == '8.4' }}
         run: "composer code-style:check"
 
       - name: "Run PHPStan"
diff --git a/composer.json b/composer.json
index 068ef756..0f99caa3 100644
--- a/composer.json
+++ b/composer.json
@@ -21,21 +21,21 @@
     }
   },
   "require": {
-    "php": ">=8.3",
+    "php": ">=8.4",
     "psr/clock": "^1.0"
   },
   "require-dev": {
     "infection/infection": "^0.32",
-    "lendable/composer-license-checker": "^1.2.2",
-    "lendable/phpunit-extensions": "^0.4",
+    "lendable/composer-license-checker": "^1.4.0",
+    "lendable/phpunit-extensions": "^0.5",
     "liuggio/fastest": "^1.13",
     "mikey179/vfsstream": "^1.6.12",
     "php-cs-fixer/shim": "^3.95.1",
     "php-parallel-lint/php-parallel-lint": "^1.4",
-    "phpstan/phpstan": "^2.1.50",
-    "phpstan/phpstan-deprecation-rules": "^2.0",
+    "phpstan/phpstan": "^2.1.51",
+    "phpstan/phpstan-deprecation-rules": "^2.0.4",
     "phpstan/phpstan-phpunit": "^2.0.16",
-    "phpstan/phpstan-strict-rules": "^2.0",
+    "phpstan/phpstan-strict-rules": "^2.0.10",
     "phpunit/phpunit": "^12.5.23",
     "rector/rector": "^2.4.2"
   },
@@ -49,7 +49,7 @@
       "infection/extension-installer": true
     },
     "platform": {
-      "php": "8.3.0"
+      "php": "8.4.0"
     }
   },
   "prefer-stable": true,