diff --git a/.github/workflows/static-analysis.yml b/.github/workflows/static-analysis.yml
index d0c7cc7..5b810e4 100644
--- a/.github/workflows/static-analysis.yml
+++ b/.github/workflows/static-analysis.yml
@@ -14,7 +14,7 @@ jobs:
       - uses: php-actions/composer@v6
         with:
           progress: yes
-          php_version: 8.1
+          php_version: 8.3
           version: 2
       - name: "PHP-CS-Fixer"
         run: composer check-cs
diff --git a/Dockerfile b/Dockerfile
index d3f46b1..e291592 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.1-cli
+FROM php:8.3-cli
 RUN apt-get update \
     && apt-get install -y \
         libzip-dev \