diff --git a/main.go b/main.go
index f599d3b..0c919f8 100644
--- a/main.go
+++ b/main.go
@@ -83,7 +83,9 @@ func ParseImageTag(imageTag string) (ImageTag, error) {
 		image = "library/" + image
 	case 2:
 		parts := strings.Split(image, "/")
-		registry = parts[0]
+		if parts[0] != "docker.io" {
+			registry = parts[0]
+		}
 		image = strings.Join(parts[1:], "/")
 	}