diff --git a/victoria-metrics/blackbox.yml b/victoria-metrics/blackbox.yml
index 08dfec1..d99cf00 100644
--- a/victoria-metrics/blackbox.yml
+++ b/victoria-metrics/blackbox.yml
@@ -40,3 +40,6 @@ modules:
   tcp:
     prober: tcp
     timeout: 5s
+    tcp:
+      preferred_ip_protocol: ip4
+      ip_protocol_fallback: false