diff --git a/.github/workflows/images.yaml b/.github/workflows/images.yaml
index 238cc6a80..93092d80b 100644
--- a/.github/workflows/images.yaml
+++ b/.github/workflows/images.yaml
@@ -216,7 +216,7 @@ jobs:
     if: |
       (github.event_name == 'push' && github.ref == 'refs/heads/main' && needs.changes.outputs.nginx125 == 'true')
     env:
-      PLATFORMS: linux/amd64,linux/arm,linux/arm64
+      PLATFORMS: linux/amd64,linux/arm,linux/arm64,linux/s390x
     steps:
       - name: Checkout
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
diff --git a/images/nginx-1.25/Makefile b/images/nginx-1.25/Makefile
index e03197109..cdd3e2a3c 100644
--- a/images/nginx-1.25/Makefile
+++ b/images/nginx-1.25/Makefile
@@ -32,7 +32,7 @@ IMAGE = $(REGISTRY)/nginx-1.25
 export DOCKER_CLI_EXPERIMENTAL=enabled
 
 # build with buildx
-PLATFORMS?=linux/amd64,linux/arm,linux/arm64
+PLATFORMS?=linux/amd64,linux/arm,linux/arm64,linux/s390x
 OUTPUT=
 PROGRESS=plain
 build: ensure-buildx