diff --git a/package.json b/package.json
index 001ed09..59872a5 100644
--- a/package.json
+++ b/package.json
@@ -25,8 +25,7 @@
   "dependencies": {
     "async-retry": "^1.2.1",
     "lru-cache": "^11.0.0",
-    "zod": "^3.20.2",
-    "zod-validation-error": "^1.0.1"
+    "zod": "^4.0.0"
   },
   "devDependencies": {
     "@apollo/gateway": "^2.13.0",
@@ -54,7 +53,8 @@
   },
   "jest": {
     "collectCoverageFrom": [
-      "./src/**"
+      "./src/**",
+      "!./src/**/*.d.ts"
     ],
     "coverageThreshold": {
       "global": {
diff --git a/src/config.js b/src/config.js
index 0181b77..935a5d7 100644
--- a/src/config.js
+++ b/src/config.js
@@ -1,6 +1,5 @@
 // @ts-check
 const { z } = require('zod')
-const { fromZodError } = require('zod-validation-error')
 
 const ConfigSchema = z.object({
   apiKey: z.string().startsWith('logql:'),
@@ -94,11 +93,7 @@ function getConfig(options) {
     return maybeConfig.data
   }
 
-  const validationError = fromZodError(maybeConfig.error, {
-    prefix: 'Invalid options',
-  })
-
-  logInitError(validationError.message)
+  logInitError(z.prettifyError(maybeConfig.error))
 }
 
 module.exports = { getConfig, loadEnv }
diff --git a/tests/config.test.js b/tests/config.test.js
index acdae96..e6e9dac 100644
--- a/tests/config.test.js
+++ b/tests/config.test.js
@@ -18,12 +18,16 @@ describe('Config Validation', () => {
 
   it('log an error when no config is given', () => {
     expect(initPlugin()).toEqual({})
-    expect(console.error).toHaveBeenCalledWith('[logql-plugin][ERROR][init] Invalid options: Required at "apiKey"')
+    expect(console.error).toHaveBeenCalledWith(
+      '[logql-plugin][ERROR][init] ✖ Invalid input: expected string, received undefined\n  → at apiKey'
+    )
   })
 
   it('log an error when config is empty', () => {
     expect(initPlugin({})).toEqual({})
-    expect(console.error).toHaveBeenCalledWith('[logql-plugin][ERROR][init] Invalid options: Required at "apiKey"')
+    expect(console.error).toHaveBeenCalledWith(
+      '[logql-plugin][ERROR][init] ✖ Invalid input: expected string, received undefined\n  → at apiKey'
+    )
   })
 
   it('work with valid minimal config', () => {
@@ -34,7 +38,9 @@ describe('Config Validation', () => {
   it('ignore env by default', () => {
     process.env.LOGQL_API_KEY = 'logql:FAKE_API_KEY'
     expect(initPlugin({})).toEqual({})
-    expect(console.error).toHaveBeenCalledWith('[logql-plugin][ERROR][init] Invalid options: Required at "apiKey"')
+    expect(console.error).toHaveBeenCalledWith(
+      '[logql-plugin][ERROR][init] ✖ Invalid input: expected string, received undefined\n  → at apiKey'
+    )
   })
 
   it('load config from env', () => {
diff --git a/yarn.lock b/yarn.lock
index 4768360..5ffaf6e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4426,12 +4426,7 @@ yocto-queue@^0.1.0:
   resolved "https://registry.yarnpkg.com/yocto-queue/-/yocto-queue-0.1.0.tgz#0294eb3dee05028d31ee1a5fa2c556a6aaf10a1b"
   integrity sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==
 
-zod-validation-error@^1.0.1:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/zod-validation-error/-/zod-validation-error-1.3.1.tgz#7134579d2ba3994495133b879a076786c8c270f5"
-  integrity sha512-cNEXpla+tREtNdAnNKY4xKY1SGOn2yzyuZMu4O0RQylX9apRpUjNcPkEc3uHIAr5Ct7LenjZt6RzjEH6+JsqVQ==
-
-zod@^3.20.2:
-  version "3.22.3"
-  resolved "https://registry.yarnpkg.com/zod/-/zod-3.22.3.tgz#2fbc96118b174290d94e8896371c95629e87a060"
-  integrity sha512-EjIevzuJRiRPbVH4mGc8nApb/lVLKVpmUhAaR5R5doKGfAnGJ6Gr3CViAVjP+4FWSxCsybeWQdcgCtbX+7oZug==
+zod@^4.0.0:
+  version "4.3.6"
+  resolved "https://registry.yarnpkg.com/zod/-/zod-4.3.6.tgz#89c56e0aa7d2b05107d894412227087885ab112a"
+  integrity sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==