diff --git a/.github/workflows/update-mozcentral-version.yaml b/.github/workflows/update-mozcentral-version.yaml
index 8f95895f..027720b8 100644
--- a/.github/workflows/update-mozcentral-version.yaml
+++ b/.github/workflows/update-mozcentral-version.yaml
@@ -2,7 +2,8 @@ name: 'Create pull requests to update mozilla-central version to the latest'
 
 on:
   schedule:
-    - cron: "00 14 * * 1" # run every Monday at 14:00 UTC (10:00 Eastern Daylight Time)
+    - cron: "00 14 */100,1-7 * 1" # run on the first Monday of each month at 14:00 UTC (10:00 Eastern Daylight Time)
+                                  # See https://blog.healthchecks.io/2022/09/schedule-cron-job-the-funky-way/
   workflow_call:
   workflow_dispatch: # or you can run it manually
 
@@ -33,8 +34,10 @@ jobs:
           add-paths: mozcentral.version
           commit-message: |
             chore(deps): upgrade SpiderMonkey to `${{ env.MOZCENTRAL_VERSION }}`
+          author: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
           branch: chore/upgrade-spidermonkey-to-${{ env.MOZCENTRAL_VERSION_SHORT }}
           title: Upgrade SpiderMonkey to mozilla-central commit `${{ env.MOZCENTRAL_VERSION }}`
           body: |
             Changeset: https://hg.mozilla.org/mozilla-central/rev/${{ env.MOZCENTRAL_VERSION }}
           labels: dependencies
+          assignees: Xmader