diff --git a/main.tf b/main.tf
index bc7dd67..026c624 100644
--- a/main.tf
+++ b/main.tf
@@ -50,7 +50,8 @@ resource "docker_container" "renovate" {
   }
 
   # DNS configuration for internal hostname resolution
-  dns = var.dns_servers
+  # Only set if dns_servers is not empty
+  dns = length(var.dns_servers) > 0 ? var.dns_servers : null
 
   # Volumes
   volumes {