diff --git a/.github/s3-cache-cleanup.py b/.github/s3-cache-cleanup.py
new file mode 100755
index 00000000000..c28d7a0d74f
--- /dev/null
+++ b/.github/s3-cache-cleanup.py
@@ -0,0 +1,44 @@
+#!/usr/bin/env python3
+
+# Deletes all objects in an S3 bucket that are older than a given number of days.
+# Used for cleaning up the custom Github Actions cache.
+
+import boto3
+import datetime
+import os
+
+# Define the S3 bucket name and the number of days to retain objects
+days_to_retain = 7
+
+bucket_name = os.environ['AWS_BUCKET_NAME']
+access_key = os.environ['AWS_ACCESS_KEY_ID']
+secret_key = os.environ['AWS_SECRET_ACCESS_KEY']
+endpoint = os.environ['AWS_ENDPOINT']
+
+# Create a connection to the S3 service
+s3 = boto3.resource('s3',
+  endpoint_url = endpoint,
+  aws_access_key_id = access_key,
+  aws_secret_access_key = secret_key,
+  region_name = 'auto',
+)
+
+bucket = s3.Bucket(bucket_name)
+
+# Calculate the retention date.
+cutoff_date = (datetime.datetime.now() - datetime.timedelta(days=days_to_retain))
+cutoff_date = cutoff_date.replace(tzinfo=datetime.timezone.utc)
+
+print(f'Deleting all objects in bucket {bucket_name} older than {cutoff_date}...')
+
+total_count = 0
+deleted_count = 0
+
+for obj in bucket.objects.all():
+    total_count += 1
+    if obj.last_modified < cutoff_date:
+        print(f'Deleting {obj.key}...')
+        obj.delete()
+        deleted_count += 1
+
+print(f'Complete! Deleted {deleted_count} objects out of a total {total_count}.')
diff --git a/.github/workflows/cache-bucket-cleanup.yaml b/.github/workflows/cache-bucket-cleanup.yaml
new file mode 100644
index 00000000000..1dd395a2e21
--- /dev/null
+++ b/.github/workflows/cache-bucket-cleanup.yaml
@@ -0,0 +1,29 @@
+# Cleans up the custom Github Actions cache bucket.
+
+name: Actions Cache Bucket Cleanup
+
+on:
+  # Trigger the workflow twice a day.
+  schedule:
+    - cron: "0 */12 * * *"
+
+     # A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "cron"
+  cron:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Install boto3 library
+        run: pip install boto3
+      - name: Clone repository
+        uses: actions/checkout@v3
+      - name: Run cleanup
+        env:
+          AWS_ENDPOINT: https://1541b1e8a3fc6ad155ce67ef38899700.r2.cloudflarestorage.com
+          AWS_ACCESS_KEY_ID: ${{ secrets.CLOUDFLARE_ARTIFACTS_CACHE_ACCESS_TOKEN }}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.CLOUDFLARE_ARTIFACTS_CACHE_ACCESS_KEY }}
+          AWS_BUCKET_NAME: wasmer-rust-artifacts-cache
+        run: |
+          ./.github/s3-cache-cleanup.py