diff --git a/checker/checker.go b/checker/checker.go
index 4cf16c7..d8b252a 100644
--- a/checker/checker.go
+++ b/checker/checker.go
@@ -110,6 +110,11 @@ func check_http(ip string) (err error) {
 		return
 	}
 	defer resp.Body.Close()
+
+	if resp.StatusCode >= 400 {
+		return fmt.Errorf("Bad status, got: %d (%s)", resp.StatusCode, resp.Status)
+	}
+
 	_, err = ioutil.ReadAll(resp.Body)
 	return
 }
@@ -123,6 +128,11 @@ func check_https(domain, ip string) (err error) {
 		return
 	}
 	defer resp.Body.Close()
+
+	if resp.StatusCode >= 300 {
+		return fmt.Errorf("Bad status, got: %d (%s)", resp.StatusCode, resp.Status)
+	}
+
 	_, err = ioutil.ReadAll(resp.Body)
 	return
 }