diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c1acf1be..b5667720 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,14 +15,24 @@ jobs:
   build:
     name: Build
 
-    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      max-parallel: 3
+      matrix:
+        os: [ ubuntu-latest ]
+        python-version: [ "3.11" ]
+        include:
+          - python-version: "3.8"
+            os: ubuntu-20.04
+
+    runs-on: ${matrix.os}
 
     steps:
       - uses: actions/checkout@v2
-      - name: Set up Python 3.11
+      - name: Set up Python 3.8
         uses: actions/setup-python@v2
         with:
-          python-version: 3.11
+          python-version: 3.8
       - name: Install dependencies
         run:
           make install
diff --git a/README.md b/README.md
index 9038f60c..92966cec 100755
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 [![Build](https://github.com/heliumedu/platform/actions/workflows/build.yml/badge.svg)](https://github.com/heliumedu/platform/actions/workflows/build.yml)
 [![Codecov](https://codecov.io/gh/HeliumEdu/platform/branch/master/graph/badge.svg)](https://codecov.io/gh/HeliumEdu/platform)
-![Python Versions](https://img.shields.io/badge/python-%203.6%20|%203.7%20|%203.8%20|%203.9%20|%203.10%20|%203.11%20-blue)
+![Python Versions](https://img.shields.io/badge/python-%203.8%20|%203.9%20|%203.10%20|%203.11%20-blue)
 ![GitHub License](https://img.shields.io/github/license/heliumedu/platform)
 
 # Helium Platform Project
@@ -9,7 +9,7 @@
 
 ## Prerequisites
 
-- Python (>= 3.6)
+- Python (>= 3.8)
 - Pip (>= 9.0)
 - MySQL (>= 5.7)
 - Redis (>= 3.2)