diff --git a/cmake/config.cmake b/cmake/config.cmake
index f1e2e97f2..aad156ae2 100644
--- a/cmake/config.cmake
+++ b/cmake/config.cmake
@@ -1,5 +1,5 @@
 message(STATUS "-------------YLT CONFIG SETTING-------------")
-option(YLT_ENABLE_SSL "Enable ssl support" ON)
+option(YLT_ENABLE_SSL "Enable ssl support" OFF)
 message(STATUS "YLT_ENABLE_SSL: ${YLT_ENABLE_SSL}")
 if (YLT_ENABLE_SSL)
     find_package(OpenSSL REQUIRED)
diff --git a/src/coro_rpc/examples/base_examples/server.cpp b/src/coro_rpc/examples/base_examples/server.cpp
index c7afd710a..6c9c3e02f 100644
--- a/src/coro_rpc/examples/base_examples/server.cpp
+++ b/src/coro_rpc/examples/base_examples/server.cpp
@@ -39,7 +39,7 @@ int main() {
   server2.register_handler<echo>();
   // async start server
   auto res = server2.async_start();
-  assert(res.has_value());
+  assert(!res.hasResult());
 
   // sync start server & sync await server stop
   return !server.start();