diff --git a/mcp-server/.yarn/install-state.gz b/mcp-server/.yarn/install-state.gz
index 8d3858fe..0822a4e0 100644
Binary files a/mcp-server/.yarn/install-state.gz and b/mcp-server/.yarn/install-state.gz differ
diff --git a/mcp-server/package.json b/mcp-server/package.json
index b88d88bf..2e66a5e5 100644
--- a/mcp-server/package.json
+++ b/mcp-server/package.json
@@ -41,7 +41,7 @@
     "@nestjs/platform-express": "^11.1.9",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1",
-    "zod": "^3.22.0"
+    "zod": "^4.2.1"
   },
   "devDependencies": {
     "@eslint/js": "^9.39.2",
diff --git a/mcp-server/yarn.lock b/mcp-server/yarn.lock
index ed5c1668..0c5f7656 100644
--- a/mcp-server/yarn.lock
+++ b/mcp-server/yarn.lock
@@ -2455,7 +2455,7 @@ __metadata:
     typescript: "npm:^5.1.3"
     typescript-eslint: "npm:^8.50.0"
     vitest: "npm:^4.0.15"
-    zod: "npm:^3.22.0"
+    zod: "npm:^4.2.1"
   bin:
     codingbuddy: ./dist/src/cli/cli.js
     codingbuddy-mcp: ./dist/src/main.js
@@ -6482,9 +6482,16 @@ __metadata:
   languageName: node
   linkType: hard
 
-"zod@npm:^3.22.0, zod@npm:^3.23.8":
+"zod@npm:^3.23.8":
   version: 3.25.76
   resolution: "zod@npm:3.25.76"
   checksum: 10c0/5718ec35e3c40b600316c5b4c5e4976f7fee68151bc8f8d90ec18a469be9571f072e1bbaace10f1e85cf8892ea12d90821b200e980ab46916a6166a4260a983c
   languageName: node
   linkType: hard
+
+"zod@npm:^4.2.1":
+  version: 4.2.1
+  resolution: "zod@npm:4.2.1"
+  checksum: 10c0/ecb5219bddf76a42d092a843fb98ad4cb78f1e1077082772b03ef032ee5cbc80790a4051836b962d26fb4af854323bc784d628bd1b8d9898149eba7af21c5560
+  languageName: node
+  linkType: hard