diff --git a/examples/demo/.gitignore b/examples/demo/.gitignore
new file mode 100644
index 0000000..b10d2cb
--- /dev/null
+++ b/examples/demo/.gitignore
@@ -0,0 +1,15 @@
+.dub
+docs.json
+__dummy.html
+docs/
+/demo
+demo.so
+demo.dylib
+demo.dll
+demo.a
+demo.lib
+demo-test-*
+*.exe
+*.o
+*.obj
+*.lst
diff --git a/examples/demo/Makefile b/examples/demo/Makefile
new file mode 100644
index 0000000..8057a18
--- /dev/null
+++ b/examples/demo/Makefile
@@ -0,0 +1,8 @@
+all:
+	dub build --config=SERVER
+	dub build --config=CLIENT
+
+clean:
+	dub clean --all-packages
+	$(RM) -fr .dub/ dub.selections.json
+	$(RM) -fr ./server ./client
diff --git a/examples/demo/dub.json b/examples/demo/dub.json
new file mode 100644
index 0000000..9eb5ccb
--- /dev/null
+++ b/examples/demo/dub.json
@@ -0,0 +1,34 @@
+{
+	"authors": [
+		"mw66"
+	],
+	"copyright": "Copyright © 2024, mw66",
+	"description": "msgpack-rpc-d demo.",
+	"license": "MIT",
+	"name": "demo",
+	"configurations": [
+		{
+			"name": "SERVER",
+			"targetName": "server",
+			"targetType": "executable",
+			"versions": [
+				"SERVER"
+			]
+		},
+		{
+			"name": "CLIENT",
+			"targetName": "client",
+			"targetType": "executable",
+			"versions": [
+				"CLIENT"
+			]
+		}
+	],
+	"dependencies": {
+		"vibe-d": "==0.8.6",
+		"msgpack-rpc": {"path": "../../"}
+	},
+	"subConfigurations": {
+		"msgpack-rpc": "default" 
+	}
+}
diff --git a/examples/demo/source/client.d b/examples/demo/source/client.d
new file mode 100755
index 0000000..4bce26c
--- /dev/null
+++ b/examples/demo/source/client.d
@@ -0,0 +1,29 @@
+#!/usr/bin/env rdmd
+
+/+dub.sdl:
+dependency "msgpack-rpc" version="~master" path="../../"
++/
+
+import std.stdio;
+
+import msgpackrpc;
+
+version (CLIENT) {
+
+void main() {
+auto client = new TCPClient(Endpoint(18800, "127.0.0.1"));
+
+// sync request
+auto num = client.call!ulong("sum", 1, 2);
+writeln(num);
+
+// async request: return a Future object
+auto future = client.callAsync("sum", 1, 2);
+writeln(future.get().as!ulong);  // /home/zhou/.dub/packages/msgpack-d/1.0.5/msgpack-d/src/msgpack/value.d
+
+// notify
+client.notify("hello", "hoge");
+
+}
+
+}
diff --git a/examples/demo/source/server.d b/examples/demo/source/server.d
new file mode 100644
index 0000000..24d1c49
--- /dev/null
+++ b/examples/demo/source/server.d
@@ -0,0 +1,23 @@
+import std.stdio;
+
+import msgpackrpc;
+
+version (SERVER) {
+
+class FooServer {
+  ulong sum(ulong l, ulong r) { return l + r; }
+
+  void hello(string msg) {   writeln(msg); }
+}
+
+void main() {
+	writeln("msgpack-rpc-d TCPServer started ...");
+
+// TCPServer or UDPServer
+auto server = new TCPServer!(FooServer)(new FooServer);
+server.listen(Endpoint(18800, "127.0.0.1"));
+server.start();
+
+}
+
+}
diff --git a/examples/with_http_server/dub.sdl b/examples/with_http_server/dub.sdl
index 1415de5..032f466 100644
--- a/examples/with_http_server/dub.sdl
+++ b/examples/with_http_server/dub.sdl
@@ -2,7 +2,7 @@ name "with_http_server"
 description "A simple vibe.d server application."
 copyright "Copyright © 2015, yannick"
 authors "yannick"
-dependency "vibe-d" version="~>0.7.25"
+dependency "vibe-d" version="==0.8.6"
 dependency "msgpack-rpc" version="~master" path="../../"
 subConfiguration "msgpack-rpc" "integrated" 
 versions "VibeCustomMain"
diff --git a/examples/with_http_server/source/app.d b/examples/with_http_server/source/app.d
index 0508409..0948236 100644
--- a/examples/with_http_server/source/app.d
+++ b/examples/with_http_server/source/app.d
@@ -21,7 +21,7 @@ static void main()
     auto settings = new HTTPServerSettings;
     settings.port = 9090;
     settings.bindAddresses = ["0.0.0.0"];
-    settings.options = settings.options | HTTPServerOption.parseCookies | HTTPServerOption.parseQueryString;
+    settings.options = settings.options | HTTPServerOption.ParseCookies | HTTPServerOption.parseQueryString;
     listenHTTP(settings, router);
 
     //start a rpc server
diff --git a/package.json b/package.json
index c29c3e4..7b5a4e1 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "targetType":  "library",
     "dependencies": { 
         "msgpack-d": ">=1.0.0-beta.7",
-        "vibe-d": ">=0.7.25"
+        "vibe-d": "==0.8.6"
     },
     "configurations": [
         {
@@ -22,5 +22,7 @@
             "versions": ["VibeCustomMain", "noExitEventloop"]
         }
     ],
-    "subConfigurations": { "vibe-d": "libevent"}
+	"subConfigurations": {
+		"vibe-d": "libevent"
+	}
 }