diff --git a/rules.yaml b/rules.yaml
index 5ec833a..6c728ab 100644
--- a/rules.yaml
+++ b/rules.yaml
@@ -1,5 +1,5 @@
 "^gcr.io/":          "gcr-io/"
-"^k8s.gcr.io":      "google-containers/"
-"^registry.k8s.io": "google-containers/"
-"^quay.io":         "quay/"
-"^ghcr.io":         "ghcr/"
+"^k8s.gcr.io/":      "google-containers/"
+"^registry.k8s.io/": "google-containers/"
+"^quay.io/":         "quay/"
+"^ghcr.io/":         "ghcr/"