diff --git a/.github/workflows/s390x_qemu.yml b/.github/workflows/s390x_qemu.yml
new file mode 100644
index 0000000..aa008d2
--- /dev/null
+++ b/.github/workflows/s390x_qemu.yml
@@ -0,0 +1,35 @@
+# This workflow will build a golang project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
+
+name: s390x-qemu
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+
+  test:
+    strategy:
+      matrix:
+        go-version: [1.18.x]
+        arch: [s390x]  
+    runs-on: ubuntu-latest
+    steps:
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: ${{ matrix.go-version }}
+
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v3
+
+    - name: Check out code
+      uses: actions/checkout@v4
+      
+    - name: Test
+      run: go test -v ./...
+      env:
+        GOARCH: ${{ matrix.arch }}   
diff --git a/README-CN.md b/README-CN.md
index 7b2835e..b6a3ebc 100644
--- a/README-CN.md
+++ b/README-CN.md
@@ -6,6 +6,7 @@
 [![ci](https://github.com/emmansun/base64/actions/workflows/ci.yml/badge.svg)](https://github.com/emmansun/base64/actions/workflows/ci.yml)
 [![arm64](https://github.com/emmansun/base64/actions/workflows/arm64_qemu.yml/badge.svg)](https://github.com/emmansun/base64/actions/workflows/arm64_qemu.yml)
 [![ppc64le](https://github.com/emmansun/base64/actions/workflows/ppc64le_qemu.yml/badge.svg)](https://github.com/emmansun/base64/actions/workflows/ppc64le_qemu.yml)
+[![s390x](https://github.com/emmansun/base64/actions/workflows/s390x_qemu.yml/badge.svg)](https://github.com/emmansun/base64/actions/workflows/s390x_qemu.yml)
 [![Documentation](https://godoc.org/github.com/emmansun/base64?status.svg)](https://godoc.org/github.com/emmansun/base64)
 ![GitHub go.mod Go version (branch)](https://img.shields.io/github/go-mod/go-version/emmansun/base64)
 [![Release](https://img.shields.io/github/release/emmansun/base64/all.svg)](https://github.com/emmansun/base64/releases)
diff --git a/README.md b/README.md
index 606f7c4..e8a0f39 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@ Base64 with SIMD acceleration
 [![ci](https://github.com/emmansun/base64/actions/workflows/ci.yml/badge.svg)](https://github.com/emmansun/base64/actions/workflows/ci.yml)
 [![arm64](https://github.com/emmansun/base64/actions/workflows/arm64_qemu.yml/badge.svg)](https://github.com/emmansun/base64/actions/workflows/arm64_qemu.yml)
 [![ppc64le](https://github.com/emmansun/base64/actions/workflows/ppc64le_qemu.yml/badge.svg)](https://github.com/emmansun/base64/actions/workflows/ppc64le_qemu.yml)
+[![s390x](https://github.com/emmansun/base64/actions/workflows/s390x_qemu.yml/badge.svg)](https://github.com/emmansun/base64/actions/workflows/s390x_qemu.yml)
 [![Documentation](https://godoc.org/github.com/emmansun/base64?status.svg)](https://godoc.org/github.com/emmansun/base64)
 ![GitHub go.mod Go version (branch)](https://img.shields.io/github/go-mod/go-version/emmansun/base64)
 [![Release](https://img.shields.io/github/release/emmansun/base64/all.svg)](https://github.com/emmansun/base64/releases)