diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index c52e224..490b36f 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -23,6 +23,7 @@ jobs:
         php-version:
           - "8.1"
           - "8.2"
+          - "8.3"
         operating-system:
           - "ubuntu-latest"
           - "windows-latest"
@@ -58,6 +59,7 @@ jobs:
         php-version:
           - "8.1"
           - "8.2"
+          - "8.3"
         operating-system:
           - "ubuntu-latest"
 
@@ -90,7 +92,7 @@ jobs:
         dependencies:
           - "locked"
         php-version:
-          - "8.1"
+          - "8.3"
         operating-system:
           - "ubuntu-latest"
 
@@ -111,4 +113,4 @@ jobs:
           dependency-versions: "${{ matrix.dependencies }}"
 
       - name: "Coding Standard"
-        run: "vendor/bin/php-cs-fixer fix --dry-run --show-progress=dots --using-cache=no --verbose"
+        run: "vendor/bin/php-cs-fixer check --show-progress=dots --using-cache=no --verbose"
diff --git a/provisioning/php/Dockerfile b/provisioning/php/Dockerfile
index 63284ea..035b461 100644
--- a/provisioning/php/Dockerfile
+++ b/provisioning/php/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.1-bullseye
+FROM php:8.3-bullseye
 
 ## Install required dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends bash make gpg gnupg dirmngr git unzip \