diff --git a/package.json b/package.json
index ccc28af..c0ecb60 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "@langchain/langgraph": "^0.2.74",
     "better-sqlite3": "^12.9.0",
     "tsx": "^4.19.2",
-    "zod": "^3.24.1"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@eslint/js": "^9.17.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index b8d7a4e..5f6835d 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -10,7 +10,7 @@ importers:
     dependencies:
       '@langchain/langgraph':
         specifier: ^0.2.74
-        version: 0.2.74(@langchain/core@0.3.80)(zod-to-json-schema@3.25.2(zod@3.25.76))
+        version: 0.2.74(@langchain/core@0.3.80)(zod-to-json-schema@3.25.2(zod@4.3.6))
       better-sqlite3:
         specifier: ^12.9.0
         version: 12.9.0
@@ -18,8 +18,8 @@ importers:
         specifier: ^4.19.2
         version: 4.21.0
       zod:
-        specifier: ^3.24.1
-        version: 3.25.76
+        specifier: ^4.3.6
+        version: 4.3.6
     devDependencies:
       '@eslint/js':
         specifier: ^9.17.0
@@ -1414,6 +1414,9 @@ packages:
   zod@3.25.76:
     resolution: {integrity: sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==}
 
+  zod@4.3.6:
+    resolution: {integrity: sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==}
+
 snapshots:
 
   '@cfworker/json-schema@4.1.1': {}
@@ -1663,7 +1666,7 @@ snapshots:
     optionalDependencies:
       '@langchain/core': 0.3.80
 
-  '@langchain/langgraph@0.2.74(@langchain/core@0.3.80)(zod-to-json-schema@3.25.2(zod@3.25.76))':
+  '@langchain/langgraph@0.2.74(@langchain/core@0.3.80)(zod-to-json-schema@3.25.2(zod@4.3.6))':
     dependencies:
       '@langchain/core': 0.3.80
       '@langchain/langgraph-checkpoint': 0.0.18(@langchain/core@0.3.80)
@@ -1671,7 +1674,7 @@ snapshots:
       uuid: 10.0.0
       zod: 3.25.76
     optionalDependencies:
-      zod-to-json-schema: 3.25.2(zod@3.25.76)
+      zod-to-json-schema: 3.25.2(zod@4.3.6)
     transitivePeerDependencies:
       - react
       - react-dom
@@ -2630,4 +2633,11 @@ snapshots:
     dependencies:
       zod: 3.25.76
 
+  zod-to-json-schema@3.25.2(zod@4.3.6):
+    dependencies:
+      zod: 4.3.6
+    optional: true
+
   zod@3.25.76: {}
+
+  zod@4.3.6: {}