diff --git a/.github/workflows/laravel-create-project.yml b/.github/workflows/laravel-create-project.yml
index 42893848..70dafa65 100644
--- a/.github/workflows/laravel-create-project.yml
+++ b/.github/workflows/laravel-create-project.yml
@@ -23,6 +23,11 @@ jobs:
           mkdir backend
           docker-compose up -d
 
+      - name: OS Version
+        run: |
+          docker-compose exec -T app cat /etc/os-release
+          docker-compose exec -T app cat /etc/debian_version
+
       - name: PHP Version
         run: docker-compose exec -T app php --version
 
diff --git a/.github/workflows/laravel-git-clone.yml b/.github/workflows/laravel-git-clone.yml
index 2ab1a9cb..e93b0383 100644
--- a/.github/workflows/laravel-git-clone.yml
+++ b/.github/workflows/laravel-git-clone.yml
@@ -24,6 +24,11 @@ jobs:
       - name: Create & Start Docker Containers
         run: docker-compose up -d
 
+      - name: OS Version
+        run: |
+          docker-compose exec -T app cat /etc/os-release
+          docker-compose exec -T app cat /etc/debian_version
+
       - name: PHP Version
         run: docker-compose exec -T app php --version
 
diff --git a/README.md b/README.md
index 29312979..7b2df348 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ http://localhost
 ### app container
 
 - Base image
-  - [php](https://hub.docker.com/_/php):8.0-fpm-buster
+  - [php](https://hub.docker.com/_/php):8.0-fpm-bullseye
   - [composer](https://hub.docker.com/_/composer):2.1
 
 ### web container
diff --git a/infra/docker/php/Dockerfile b/infra/docker/php/Dockerfile
index bb88f5b9..d816574f 100644
--- a/infra/docker/php/Dockerfile
+++ b/infra/docker/php/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.0-fpm-buster
+FROM php:8.0-fpm-bullseye
 LABEL maintainer="ucan-lab <yes@u-can.pro>"
 SHELL ["/bin/bash", "-oeux", "pipefail", "-c"]