diff --git a/ci/pipeline.yml b/ci/pipeline.yml
index 4fc7d31..c1d1fa0 100644
--- a/ci/pipeline.yml
+++ b/ci/pipeline.yml
@@ -8,6 +8,7 @@ resources:
     fetch_tags: true
 - name: upstream-image
   type: registry-image
+  check_every: 6h
   source:
     repository: nginx
     tag: alpine