diff --git a/.github/workflows/calibreapp-image-actions.yml b/.github/workflows/calibreapp-image-actions.yml
index 5c5a3873f..07b53b529 100644
--- a/.github/workflows/calibreapp-image-actions.yml
+++ b/.github/workflows/calibreapp-image-actions.yml
@@ -1,35 +1,28 @@
+# Compress images on demand (workflow_dispatch), and at 11pm every Sunday (schedule).
+# Open a Pull Request if any images can be compressed.
 name: Compress Images
 on:
-  pull_request:
-    # Run Image Actions when JPG, JPEG, PNG or WebP files are added or changed.
-    # See https://help.github.com/en/actions/automating-your-workflow-with-github-actions/workflow-syntax-for-github-actions#onpushpull_requestpaths for reference.
-    paths:
-      - '**.jpg'
-      - '**.jpeg'
-      - '**.png'
-      - '**.webp'
-  schedule:
-  - cron: '0 0 1 * *'
-    paths:
-      - '**.jpg'
-      - '**.jpeg'
-      - '**.png'
-      - '**.webp'
   workflow_dispatch:
-
+  schedule:
+    - cron: '00 23 * * 0'
 jobs:
   build:
-    # Only run on Pull Requests within the same repository, and not from forks.
-    if: github.event.pull_request.head.repo.full_name == github.repository
     name: calibreapp/image-actions
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v2
-
       - name: Compress Images
+        id: calibre
         uses: calibreapp/image-actions@main
         with:
-          # The `GITHUB_TOKEN` is automatically generated by GitHub and scoped only to the repository that is currently running the action. By default, the action can’t update Pull Requests initiated from forked repositories.
-          # See https://docs.github.com/en/actions/reference/authentication-in-a-workflow and https://help.github.com/en/articles/virtual-environments-for-github-actions#token-permissions
           githubToken: ${{ secrets.GITHUB_TOKEN }}
+          compressOnly: true
+      - name: Create New Pull Request If Needed
+        if: steps.calibre.outputs.markdown != ''
+        uses: peter-evans/create-pull-request@v3
+        with:
+          title: Compressed Images Nightly
+          branch-suffix: timestamp
+          commit-message: Compressed Images
+          body: ${{ steps.calibre.outputs.markdown }}