diff --git a/td/telegram/net/ConnectionCreator.cpp b/td/telegram/net/ConnectionCreator.cpp
index 297b2112..66c281ae 100644
--- a/td/telegram/net/ConnectionCreator.cpp
+++ b/td/telegram/net/ConnectionCreator.cpp
@@ -1285,6 +1285,19 @@ DcOptions ConnectionCreator::get_default_dc_options(bool is_test) {
     }
   };
   vector<int> ports = {443, 80, 5222};
+#if TD_EMSCRIPTEN
+  if (is_test) {
+    add_ip_ports(1, {"pluto.web.telegram.org/apiws_test"}, {443}, HostType::Url);
+    add_ip_ports(2, {"venus.web.telegram.org/apiws_test"}, {443}, HostType::Url);
+    add_ip_ports(3, {"aurora.web.telegram.org/apiws_test"}, {443}, HostType::Url);
+  } else {
+    add_ip_ports(1, {"pluto.web.telegram.org/apiws"}, {443}, HostType::Url);
+    add_ip_ports(2, {"venus.web.telegram.org/apiws"}, {443}, HostType::Url);
+    add_ip_ports(3, {"aurora.web.telegram.org/apiws"}, {443}, HostType::Url);
+    add_ip_ports(4, {"vesta.web.telegram.org/apiws"}, {443}, HostType::Url);
+    add_ip_ports(5, {"flora.web.telegram.org/apiws"}, {443}, HostType::Url);
+  }
+#else
   if (is_test) {
     add_ip_ports(1, {"149.154.175.10"}, ports);
     add_ip_ports(2, {"149.154.167.40"}, ports);
@@ -1306,6 +1319,7 @@ DcOptions ConnectionCreator::get_default_dc_options(bool is_test) {
     add_ip_ports(4, {"2001:67c:4e8:f004::a"}, ports, HostType::IPv6);
     add_ip_ports(5, {"2001:b28:f23f:f005::a"}, ports, HostType::IPv6);
   }
+#endif
   return res;
 }
 
diff --git a/test/mtproto.cpp b/test/mtproto.cpp
index 87a770fd..f759ea43 100644
--- a/test/mtproto.cpp
+++ b/test/mtproto.cpp
@@ -126,7 +126,11 @@ class TestPingActor : public Actor {
 
 static IPAddress get_default_ip_address() {
   IPAddress ip_address;
+#if TD_EMSCRIPTEN
+  ip_address.init_host_port("venus.web.telegram.org/apiws", 443).ensure();
+#else
   ip_address.init_ipv4_port("149.154.167.40", 80).ensure();
+#endif
   return ip_address;
 }