diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 8322900..5712d96 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -25,7 +25,7 @@ jobs:
   build-and-publish-image:
     if: github.event_name == 'workflow_dispatch' || startsWith(github.event.release.tag_name, 'v')
     name: Build and publish image
-    uses: alphagov/govuk-infrastructure/.github/workflows/build-and-push-image.yml@main
+    uses: alphagov/govuk-infrastructure/.github/workflows/build-and-push-multiarch-image.yml@main
     with:
       gitRef: ${{ inputs.gitRef || github.event.release.tag_name }}
     permissions:
diff --git a/.ruby-version b/.ruby-version
index 15a2799..bea438e 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.3.0
+3.3.1
diff --git a/Dockerfile b/Dockerfile
index d37a9e7..a53e9b7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ ARG ruby_version=3.3
 ARG base_image=ghcr.io/alphagov/govuk-ruby-base:$ruby_version
 ARG builder_image=ghcr.io/alphagov/govuk-ruby-builder:$ruby_version
 
-FROM $builder_image AS builder
+FROM --platform=$TARGETPLATFORM $builder_image AS builder
 
 WORKDIR $APP_HOME
 COPY Gemfile* .ruby-version ./
@@ -11,7 +11,7 @@ COPY . .
 RUN bootsnap precompile --gemfile .
 
 
-FROM $base_image
+FROM --platform=$TARGETPLATFORM $base_image
 
 WORKDIR $APP_HOME
 COPY --from=builder $BUNDLE_PATH $BUNDLE_PATH