diff --git a/Artnet/Receiver.h b/Artnet/Receiver.h
index 4abd265..004efe8 100644
--- a/Artnet/Receiver.h
+++ b/Artnet/Receiver.h
@@ -328,14 +328,16 @@ class Receiver_
         this->macAddress(my_mac);
 
         arx::stdx::map<uint16_t, bool> universes;
-
         for (const auto &cb_pair : this->callback_art_dmx_universes) {
             universes[cb_pair.first] = true;
         }
-
         for (const auto &cb_pair : this->callback_art_nzs_universes) {
             universes[cb_pair.first] = true;
         }
+        // if no universe is subscribed, send reply for universe 0
+        if (universes.empty()) {
+            universes[0] = true;
+        }
 
         for (const auto &u_pair : universes) {
             art_poll_reply::Packet reply = art_poll_reply::generatePacketFrom(my_ip, my_mac, u_pair.first, this->art_poll_reply_config);
diff --git a/library.json b/library.json
index 9e4c6c2..bfdaae6 100644
--- a/library.json
+++ b/library.json
@@ -11,7 +11,7 @@
 		"url": "https://github.com/hideakitai",
 		"maintainer": true
 	},
-	"version": "0.5.0",
+	"version": "0.6.0",
 	"license": "MIT",
 	"frameworks": "*",
 	"platforms": "*",
diff --git a/library.properties b/library.properties
index 277630e..ca72ee1 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=ArtNet
-version=0.5.0
+version=0.6.0
 author=hideakitai
 maintainer=hideakitai
 sentence=Art-Net Sender/Receiver for Arduino (Ethernet, WiFi)