diff --git a/.github/workflows/build-images.yml b/.github/workflows/build-images.yml
index a786e29..486f99d 100644
--- a/.github/workflows/build-images.yml
+++ b/.github/workflows/build-images.yml
@@ -134,7 +134,8 @@ jobs:
                 tag: ($ver + (if (.suffix // "") == "" then "" else "-" + .suffix end)),
                 context: $ctx,
                 target: .target,
-                build_args: ((.args // {}) | to_entries | map(.key + "=" + (.value | tostring)) | join("\n"))
+                build_args: ((.args // {}) | to_entries | map(.key + "=" + (.value | tostring)) | join("\n")),
+                platforms: (.platforms // "linux/amd64")
               }
             ' <<< "$entries")
           done
@@ -158,6 +159,9 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -173,7 +177,7 @@ jobs:
           context: ./${{ matrix.build.context }}
           target: ${{ matrix.build.target }}
           build-args: ${{ matrix.build.build_args }}
-          platforms: linux/amd64
+          platforms: ${{ matrix.build.platforms }}
           push: true
           tags: devitools/${{ matrix.build.image }}:${{ matrix.build.tag }}
           cache-from: type=gha,scope=${{ matrix.build.image }}-${{ matrix.build.tag }}
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index 2e11c82..160b905 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -74,6 +74,18 @@ jobs:
               errors=$((errors+1))
             fi
 
+            bad_platforms=$(jq -c '[.[] | select(
+              has("platforms") and (
+                (.platforms | type) != "string" or
+                (.platforms | length) == 0
+              )
+            )]' <<< "$entries")
+            if [ "$(jq 'length' <<< "$bad_platforms")" != "0" ]; then
+              echo "::error file=${manifest}::'platforms' must be a non-empty string when present (e.g. 'linux/amd64' or 'linux/amd64,linux/arm64'):"
+              jq -r '.[] | "  - " + (. | tostring)' <<< "$bad_platforms"
+              errors=$((errors+1))
+            fi
+
             if [ ! -f "$dockerfile" ]; then
               echo "::error file=${manifest}::sibling Dockerfile not found at ${dockerfile}"
               errors=$((errors+1))
diff --git a/php-hyperf/8.3/variants.yaml b/php-hyperf/8.3/variants.yaml
index 1f541b3..4486bb1 100644
--- a/php-hyperf/8.3/variants.yaml
+++ b/php-hyperf/8.3/variants.yaml
@@ -4,6 +4,11 @@
   target: hyperf
   args:
     APP_TARGET: dev
+- suffix: arm-dev
+  target: hyperf
+  args:
+    APP_TARGET: dev
+  platforms: linux/arm64
 - suffix: otel
   target: hyperf-otel
   args: