diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index c526151..a310bad 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -6,8 +6,11 @@ name: Docker
 # documentation.
 
 on:
+  schedule:
+    - cron: '43 23 * * *'
   push:
-    branches-ignore: [ "*" ]
+    branches: [ "master" ]
+    # Publish semver tags as releases.
     tags: [ 'v*.*.*' ]
   pull_request:
     branches: [ "master" ]
@@ -38,6 +41,8 @@ jobs:
       - name: Install cosign
         if: github.event_name != 'pull_request'
         uses: sigstore/cosign-installer@6e04d228eb30da1757ee4e1dd75a0ec73a653e06 #v3.1.1
+        with:
+          cosign-release: 'v2.1.1'
 
       # Set up BuildKit Docker container builder to be able to build
       # multi-platform images and export cache