diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5c6e5f1..c394c61 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
       - name: Install PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.3
+          php-version: 8.4
           coverage: none
           extensions: json
           tools: cs2pr
@@ -41,7 +41,7 @@ jobs:
       - name: Install PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.3
+          php-version: 8.4
           coverage: none
           extensions: json
           tools: cs2pr
@@ -59,13 +59,13 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - "8.3"
           - "8.4"
+          - "8.5"
         dependencies:
           - "highest"
         include:
           - dependencies: "lowest"
-            php-version: "8.3"
+            php-version: "8.4"
     name: PHP ${{ matrix.php-version }} Test ${{ matrix.dependencies }}
 
     steps:
diff --git a/composer.json b/composer.json
index 63fd776..a5a3315 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
         }
     },
     "require": {
-        "php": "^8.3",
+        "php": "^8.4",
         "doctrine/coding-standard": "^14",
         "slevomat/coding-standard": "^8.23.0",
         "squizlabs/php_codesniffer": "^4"