diff --git a/.github/workflows/call-docker-build.yaml b/.github/workflows/call-docker-build.yaml
index 16a5fbc..5a8c398 100644
--- a/.github/workflows/call-docker-build.yaml
+++ b/.github/workflows/call-docker-build.yaml
@@ -18,6 +18,8 @@ on:
   schedule:
     # re-run montly to keep image fresh with upstream base images
     - cron: '0 12 15 * *'
+  workflow_dispatch:
+    # run manually from Actions tab
 
 
 jobs: