diff --git a/README.md b/README.md
index f43ca4b..2bd152d 100644
--- a/README.md
+++ b/README.md
@@ -14,9 +14,12 @@ Google Map location plugin for GUI Chat applications. Display locations on an in
 ## Installation
 
 ```bash
-yarn add @gui-chat-plugin/map
+yarn add @gui-chat-plugin/map 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 90d9d9d..b86beae 100644
--- a/package.json
+++ b/package.json
@@ -30,9 +30,6 @@
     "typecheck": "vue-tsc --noEmit",
     "lint": "eslint src"
   },
-  "dependencies": {
-    "gui-chat-protocol": "^1.2.0"
-  },
   "devDependencies": {
     "@eslint/js": "^10.0.1",
     "@tailwindcss/vite": "^4.3.3",
@@ -51,6 +48,7 @@
     "vue-tsc": "^3.3.8"
   },
   "peerDependencies": {
-    "vue": "^3.5.0"
+    "vue": "^3.5.0",
+    "gui-chat-protocol": "^1.2.0"
   }
 }