diff --git a/packages/cli/package.json b/packages/cli/package.json
index b88deac7c..f964e7c61 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -34,7 +34,7 @@
     "chalk": "^5.3.0",
     "commander": "^14.0.3",
     "tsx": "^4.7.1",
-    "zod": "^3.24.1"
+    "zod": "^4.3.6"
   },
   "peerDependencies": {
     "@objectstack/core": "workspace:*"
diff --git a/packages/core/package.json b/packages/core/package.json
index 0b3ca6ed1..d2e6d12b2 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -27,7 +27,7 @@
     "@objectstack/spec": "workspace:*",
     "pino": "^10.3.0",
     "pino-pretty": "^13.1.3",
-    "zod": "^3.24.1"
+    "zod": "^4.3.6"
   },
   "peerDependencies": {
     "pino": "^8.0.0"
diff --git a/packages/metadata/package.json b/packages/metadata/package.json
index e3a959d73..8eee53018 100644
--- a/packages/metadata/package.json
+++ b/packages/metadata/package.json
@@ -39,7 +39,7 @@
     "glob": "^13.0.1",
     "js-yaml": "^4.1.0",
     "chokidar": "^5.0.0",
-    "zod": "^3.24.1"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@types/js-yaml": "^4.0.9",
diff --git a/packages/rest/package.json b/packages/rest/package.json
index dc8ec3480..2253c30f3 100644
--- a/packages/rest/package.json
+++ b/packages/rest/package.json
@@ -21,7 +21,7 @@
   "dependencies": {
     "@objectstack/core": "workspace:*",
     "@objectstack/spec": "workspace:*",
-    "zod": "^3.24.1"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "typescript": "^5.0.0",
diff --git a/packages/runtime/package.json b/packages/runtime/package.json
index 3c396a6f0..8fe9a7cb2 100644
--- a/packages/runtime/package.json
+++ b/packages/runtime/package.json
@@ -23,7 +23,7 @@
     "@objectstack/rest": "workspace:*",
     "@objectstack/spec": "workspace:*",
     "@objectstack/types": "workspace:*",
-    "zod": "^3.24.1"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "typescript": "^5.0.0",
diff --git a/packages/spec/package.json b/packages/spec/package.json
index 22f74ec65..33b153915 100644
--- a/packages/spec/package.json
+++ b/packages/spec/package.json
@@ -116,7 +116,7 @@
     "zod-to-json-schema": "^3.25.1"
   },
   "dependencies": {
-    "zod": "^3.24.1"
+    "zod": "^4.3.6"
   },
   "engines": {
     "node": ">=18.0.0"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e967c911e..798853710 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -432,8 +432,8 @@ importers:
         specifier: ^4.7.1
         version: 4.21.0
       zod:
-        specifier: ^3.24.1
-        version: 3.25.76
+        specifier: ^4.3.6
+        version: 4.3.6
     devDependencies:
       '@types/node':
         specifier: ^25.1.0
@@ -522,8 +522,8 @@ importers:
         specifier: ^13.1.3
         version: 13.1.3
       zod:
-        specifier: ^3.24.1
-        version: 3.25.76
+        specifier: ^4.3.6
+        version: 4.3.6
     devDependencies:
       '@types/node':
         specifier: ^25.1.0
@@ -556,8 +556,8 @@ importers:
         specifier: ^4.1.0
         version: 4.1.1
       zod:
-        specifier: ^3.24.1
-        version: 3.25.76
+        specifier: ^4.3.6
+        version: 4.3.6
     devDependencies:
       '@types/js-yaml':
         specifier: ^4.0.9
@@ -675,8 +675,8 @@ importers:
         specifier: workspace:*
         version: link:../spec
       zod:
-        specifier: ^3.24.1
-        version: 3.25.76
+        specifier: ^4.3.6
+        version: 4.3.6
     devDependencies:
       typescript:
         specifier: ^5.0.0
@@ -700,8 +700,8 @@ importers:
         specifier: workspace:*
         version: link:../types
       zod:
-        specifier: ^3.24.1
-        version: 3.25.76
+        specifier: ^4.3.6
+        version: 4.3.6
     devDependencies:
       typescript:
         specifier: ^5.0.0
@@ -713,8 +713,8 @@ importers:
   packages/spec:
     dependencies:
       zod:
-        specifier: ^3.24.1
-        version: 3.25.76
+        specifier: ^4.3.6
+        version: 4.3.6
     devDependencies:
       '@types/node':
         specifier: ^25.1.0
@@ -733,7 +733,7 @@ importers:
         version: 4.0.18(@types/node@25.1.0)(happy-dom@20.5.0)(jiti@2.6.1)(lightningcss@1.30.2)(msw@2.12.7(@types/node@25.1.0)(typescript@5.9.3))(tsx@4.21.0)
       zod-to-json-schema:
         specifier: ^3.25.1
-        version: 3.25.1(zod@3.25.76)
+        version: 3.25.1(zod@4.3.6)
 
   packages/types:
     dependencies:
@@ -4568,9 +4568,6 @@ packages:
     peerDependencies:
       zod: ^3.25 || ^4
 
-  zod@3.25.76:
-    resolution: {integrity: sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==}
-
   zod@4.3.6:
     resolution: {integrity: sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==}
 
@@ -9056,11 +9053,9 @@ snapshots:
 
   yoctocolors-cjs@2.1.3: {}
 
-  zod-to-json-schema@3.25.1(zod@3.25.76):
+  zod-to-json-schema@3.25.1(zod@4.3.6):
     dependencies:
-      zod: 3.25.76
-
-  zod@3.25.76: {}
+      zod: 4.3.6
 
   zod@4.3.6: {}