diff --git a/examples/client/CMakeLists.txt b/examples/client/CMakeLists.txt
index 609c152..bbed460 100644
--- a/examples/client/CMakeLists.txt
+++ b/examples/client/CMakeLists.txt
@@ -3,7 +3,7 @@ project(basic_client)
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread -std=c++11")
 
-SET(ENABLE_SSL ON)
+SET(ENABLE_SSL OFF)
 
 if (ENABLE_SSL)
 	add_definitions(-DCINATRA_ENABLE_SSL)
diff --git a/examples/client/main.cpp b/examples/client/main.cpp
index 778ac03..40a9545 100644
--- a/examples/client/main.cpp
+++ b/examples/client/main.cpp
@@ -552,7 +552,7 @@ void test_threads() {
 void test_ssl() {
     bool is_ssl = true;
     rpc_client client;
-    client.set_error_callback([](auto ec) {
+    client.set_error_callback([](boost::system::error_code ec) {
         std::cout << ec.message() << "\n";
     });
 
@@ -587,7 +587,7 @@ void test_ssl() {
             std::cout << result1.as<std::string>() << " future\n";
         }
 
-        client.async_call("echo", [](auto ec, auto data) {
+        client.async_call("echo", [](boost::system::error_code ec, string_view data) {
             if (ec) {                
                 std::cout << ec.message() <<" "<< data << "\n";
                 return;
diff --git a/examples/client/server.crt b/examples/client/server.crt
new file mode 100644
index 0000000..2ed256b
--- /dev/null
+++ b/examples/client/server.crt
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/examples/server/server.crt b/examples/server/server.crt
new file mode 100644
index 0000000..2ed256b
--- /dev/null
+++ b/examples/server/server.crt
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/examples/server/server.key b/examples/server/server.key
new file mode 100644
index 0000000..90a0982
--- /dev/null
+++ b/examples/server/server.key
@@ -0,0 +1,18 @@
+-----BEGIN RSA PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: DES-EDE3-CBC,6908C3604219EECA
+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+-----END RSA PRIVATE KEY-----