diff --git a/rules.yaml b/rules.yaml
index 4e1b1d5..772fe31 100644
--- a/rules.yaml
+++ b/rules.yaml
@@ -1,4 +1,4 @@
-"^gcr.io/":          "gcr-io"
+"^gcr.io/":          "gcr-io."
 "^k8s.gcr.io":      "google-containers"
 "^registry.k8s.io": "google-containers"
 "^quay.io":         "quay"