diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index d9c9ef6..0000000
--- a/Dockerfile
+++ /dev/null
@@ -1,13 +0,0 @@
-FROM ruby:3.2.2-alpine
-
-RUN apk add --update build-base git
-
-LABEL "repository"="https://github.com/standardrb/standardrb-action"
-LABEL "version"="0.1.0"
-
-COPY lib /action/lib
-COPY README.md LICENSE /
-
-RUN gem install bundler
-
-ENTRYPOINT ["/action/lib/entrypoint.sh"]
diff --git a/action.yml b/action.yml
index f9e03d1..17d459a 100644
--- a/action.yml
+++ b/action.yml
@@ -1,12 +1,40 @@
-
 name: 'Standard Ruby'
-description: 'A GitHub Action that lints your Ruby code with Standard Ruby'
+description: 'A GitHub Action that lints and auto-fixes your Ruby code with Standard Ruby'
 author: 'Justin Searls <searls@gmail.com>'
 runs:
-  using: 'docker'
-  image: 'Dockerfile'
+  using: 'composite'
+  steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 'ruby'
+        bundler-cache: true
+
+    - name: Install dependencies
+      run: bundle install
+
+    - name: Run Standard Ruby with autofix
+      run: bundle exec standardrb --fix
+      id: standardrb
+
+    - name: Commit changes
+      run: |
+        git config --global user.name 'standard-ruby-action[bot]'
+        git config --global user.email 'standard-ruby-action[bot]@users.noreply.github.com'
+        # Add any files that were changed by Standard Ruby
+        git diff --name-only --diff-filter=M | xargs git add
+        git commit -m "Apply Standard Ruby autofixes" || echo "No changes to commit"
+        git push
+
+    - name: Fail if Standard Ruby failed
+      if: ${{ steps.standardrb.outcome == 'failure' }}
+      run: exit 1
+
 env:
-  GITHUB_TOKEN: secrets.GITHUB_TOKEN
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 branding:
   icon: 'code'
   color: 'gray-dark'
diff --git a/lib/entrypoint.sh b/lib/entrypoint.sh
deleted file mode 100755
index 9af474d..0000000
--- a/lib/entrypoint.sh
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/bin/sh
-
-set -e
-
-CMD="standardrb --parallel -f github"
-
-cd "$GITHUB_WORKSPACE"
-
-if [ "$USE_BUNDLE_VERSION" = "true" ]; then
-  echo "[info] using bundled version"
-  bundle install
-  CMD="bundle exec $CMD"
-else
-  echo "[info] using current version"
-  gem install standard
-fi
-
-echo "[info] running standard as '$CMD'"
-eval "$CMD"