diff --git a/mcp/package.json b/mcp/package.json
index 56413a9..d2286a5 100644
--- a/mcp/package.json
+++ b/mcp/package.json
@@ -17,7 +17,7 @@
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.30.0",
-    "zod": "^4.0.0"
+    "zod": "^4.6.6"
   },
   "devDependencies": {
     "@types/node": "^24.0.0",
diff --git a/mcp/pnpm-lock.yaml b/mcp/pnpm-lock.yaml
index 8be8645..103162b 100644
--- a/mcp/pnpm-lock.yaml
+++ b/mcp/pnpm-lock.yaml
@@ -10,10 +10,10 @@ importers:
     dependencies:
       '@modelcontextprotocol/sdk':
         specifier: ^1.30.0
-        version: 1.30.0(zod@4.6.5)
+        version: 1.30.0(zod@4.6.6)
       zod:
-        specifier: ^4.0.0
-        version: 4.6.5
+        specifier: ^4.6.6
+        version: 4.6.6
     devDependencies:
       '@types/node':
         specifier: ^24.0.0
@@ -402,8 +402,8 @@ packages:
     peerDependencies:
       zod: ^3.25.28 || ^4
 
-  zod@4.6.5:
-    resolution: {integrity: sha512-v5l/aFXZQeai4awLbOpSoHecE9UiMrnfx75tEXLjNonXVARxQ5mOeipTjROUchszUNCqnE+hqAMujRsRHsut2Q==}
+  zod@4.6.6:
+    resolution: {integrity: sha512-4UmzQUF5fxvfcYHlbjBmejU+w+hbDnWFx4aS8kBx7nPBHcO2SqPbpAG8snbdg+Xse4pRefR98hgjFgIMCI/UhA==}
 
 snapshots:
 
@@ -411,7 +411,7 @@ snapshots:
     dependencies:
       hono: 4.13.8
 
-  '@modelcontextprotocol/sdk@1.30.0(zod@4.6.5)':
+  '@modelcontextprotocol/sdk@1.30.0(zod@4.6.6)':
     dependencies:
       '@hono/node-server': 2.1.1(hono@4.13.8)
       ajv: 8.20.0
@@ -428,8 +428,8 @@ snapshots:
       json-schema-typed: 8.0.2
       pkce-challenge: 5.0.1
       raw-body: 3.0.2
-      zod: 4.6.5
-      zod-to-json-schema: 3.25.2(zod@4.6.5)
+      zod: 4.6.6
+      zod-to-json-schema: 3.25.2(zod@4.6.6)
     transitivePeerDependencies:
       - supports-color
 
@@ -808,8 +808,8 @@ snapshots:
 
   wrappy@1.0.2: {}
 
-  zod-to-json-schema@3.25.2(zod@4.6.5):
+  zod-to-json-schema@3.25.2(zod@4.6.6):
     dependencies:
-      zod: 4.6.5
+      zod: 4.6.6
 
-  zod@4.6.5: {}
+  zod@4.6.6: {}