diff --git a/README.md b/README.md
index 12619da..52edd38 100644
--- a/README.md
+++ b/README.md
@@ -15,9 +15,12 @@ Weather forecast plugin for GUI Chat applications. Fetches weather data from Jap
 ## Installation
 
 ```bash
-yarn add @gui-chat-plugin/weather
+yarn add @gui-chat-plugin/weather gui-chat-protocol
 ```
 
+> `gui-chat-protocol` is a peer dependency — install it alongside the plugin; the host application provides the runtime and this plugin only declares the compatible range.
+
+
 ## Usage
 
 ### Vue Integration
diff --git a/package.json b/package.json
index cdb1d36..3e55ccb 100644
--- a/package.json
+++ b/package.json
@@ -34,9 +34,7 @@
     "lint": "eslint src demo"
   },
   "peerDependencies": {
-    "vue": "^3.5.0"
-  },
-  "dependencies": {
+    "vue": "^3.5.0",
     "gui-chat-protocol": "^1.2.0"
   },
   "devDependencies": {
@@ -53,7 +51,8 @@
     "vite": "^8.1.5",
     "vue": "^3.5.40",
     "vue-eslint-parser": "^10.4.1",
-    "vue-tsc": "^3.3.8"
+    "vue-tsc": "^3.3.8",
+    "gui-chat-protocol": "^1.2.0"
   },
   "keywords": [
     "guichat",