diff --git a/packages/config/package.json b/packages/config/package.json
index 9eb52fc3a9..e68e0f080a 100644
--- a/packages/config/package.json
+++ b/packages/config/package.json
@@ -11,7 +11,7 @@
   },
   "devDependencies": {
     "@clipboard-health/contract-core": "0.18.0",
-    "zod": "3.25.65",
+    "zod": "4.0.14",
     "zod-validation-error": "3.5.1"
   },
   "keywords": [
@@ -22,7 +22,7 @@
   "license": "MIT",
   "main": "./src/index.js",
   "peerDependencies": {
-    "zod": "^3",
+    "zod": "^3 || ^4.0.0",
     "zod-validation-error": "^3"
   },
   "publishConfig": {
diff --git a/packages/contract-core/package.json b/packages/contract-core/package.json
index 025f71dec1..5c537806c6 100644
--- a/packages/contract-core/package.json
+++ b/packages/contract-core/package.json
@@ -8,7 +8,7 @@
   },
   "devDependencies": {
     "@clipboard-health/testing-core": "0.16.0",
-    "zod": "3.25.65"
+    "zod": "4.0.14"
   },
   "keywords": [
     "contract",
@@ -19,7 +19,7 @@
   "license": "MIT",
   "main": "./src/index.js",
   "peerDependencies": {
-    "zod": "^3"
+    "zod": "^3 || ^4.0.0"
   },
   "publishConfig": {
     "access": "public"
diff --git a/packages/example-nestjs/package.json b/packages/example-nestjs/package.json
index 1eb1f57d11..4e7230ae16 100644
--- a/packages/example-nestjs/package.json
+++ b/packages/example-nestjs/package.json
@@ -13,7 +13,7 @@
     "@ts-rest/nest": "3.52.1",
     "qs": "6.14.0",
     "reflect-metadata": "0.2.2",
-    "zod": "3.25.65"
+    "zod": "4.0.14"
   },
   "devDependencies": {
     "@nestjs/testing": "11.1.3",
diff --git a/packages/json-api-nestjs/package.json b/packages/json-api-nestjs/package.json
index bbdb066306..eb88ea3ce8 100644
--- a/packages/json-api-nestjs/package.json
+++ b/packages/json-api-nestjs/package.json
@@ -10,7 +10,7 @@
   "devDependencies": {
     "@clipboard-health/testing-core": "0.16.0",
     "type-fest": "4.41.0",
-    "zod": "3.25.65"
+    "zod": "4.0.14"
   },
   "keywords": [
     "api",
@@ -25,7 +25,7 @@
   "main": "./src/index.js",
   "peerDependencies": {
     "type-fest": "^4",
-    "zod": "^3"
+    "zod": "^3 || ^4.0.0"
   },
   "publishConfig": {
     "access": "public"
diff --git a/packages/testing-core/package.json b/packages/testing-core/package.json
index f3f49d5bd6..19961208a4 100644
--- a/packages/testing-core/package.json
+++ b/packages/testing-core/package.json
@@ -8,7 +8,7 @@
     "tslib": "2.8.1"
   },
   "devDependencies": {
-    "zod": "3.25.65"
+    "zod": "4.0.14"
   },
   "keywords": [
     "expect",
@@ -18,7 +18,7 @@
   "license": "MIT",
   "main": "./src/index.js",
   "peerDependencies": {
-    "zod": "^3"
+    "zod": "^3 || ^4.0.0"
   },
   "publishConfig": {
     "access": "public"
diff --git a/packages/util-ts/package.json b/packages/util-ts/package.json
index 4c12861e03..8389045412 100644
--- a/packages/util-ts/package.json
+++ b/packages/util-ts/package.json
@@ -8,7 +8,7 @@
   },
   "devDependencies": {
     "type-fest": "4.41.0",
-    "zod": "3.25.65"
+    "zod": "4.0.14"
   },
   "keywords": [
     "typescript",
@@ -18,7 +18,7 @@
   "main": "./src/index.js",
   "peerDependencies": {
     "type-fest": "^4",
-    "zod": "^3"
+    "zod": "^3 || ^4.0.0"
   },
   "publishConfig": {
     "access": "public"