diff --git a/src/OverteClient.cpp b/src/OverteClient.cpp
index 85892b9..6908660 100644
--- a/src/OverteClient.cpp
+++ b/src/OverteClient.cpp
@@ -420,8 +420,10 @@ void OverteClient::poll() {
         auto now = std::chrono::steady_clock::now();
         
         if (std::chrono::duration_cast<std::chrono::seconds>(now - lastPing).count() >= 1) {
-            std::cout << "[OverteClient] Sending periodic ping to domain (localID=" << m_localID << ")" << std::endl;
-            sendPing(m_udpFd, m_udpAddr, m_udpAddrLen);
+            // EXPERIMENTAL: Send DomainListRequest instead of Ping to avoid HMAC verification issues
+            // DomainListRequest is non-sourced and non-verified
+            std::cout << "[OverteClient] Sending periodic DomainListRequest (keep-alive, localID=" << m_localID << ")" << std::endl;
+            sendDomainListRequest();
             lastPing = now;
         }