diff --git a/Containerfile b/Containerfile
index d57b734..4799229 100644
--- a/Containerfile
+++ b/Containerfile
@@ -1,4 +1,4 @@
-FROM php:8.1-alpine
+FROM php:8.3-alpine
 
 WORKDIR /code
 COPY --from=composer:2 /usr/bin/composer /usr/bin/composer
diff --git a/composer.json b/composer.json
index 7bea2b5..e04b3bb 100644
--- a/composer.json
+++ b/composer.json
@@ -14,6 +14,7 @@
         }
     ],
     "require": {
+        "php": "^8.3.0",
         "symfony/http-client": "^7.1",
         "symfony/dependency-injection": "^7.1",
         "symfony/framework-bundle": "^7.1",