diff --git a/.changeset/metal-glasses-bow.md b/.changeset/metal-glasses-bow.md
new file mode 100644
index 00000000000..48c99bbf5c7
--- /dev/null
+++ b/.changeset/metal-glasses-bow.md
@@ -0,0 +1,5 @@
+---
+'graphiql': patch
+---
+
+update graphql to `16.9.0` and use vite `define` configuration to remove development code from cdn bundle
diff --git a/examples/cm6-graphql-legacy-parcel/package.json b/examples/cm6-graphql-legacy-parcel/package.json
index 320173bbe95..8a5077a186d 100644
--- a/examples/cm6-graphql-legacy-parcel/package.json
+++ b/examples/cm6-graphql-legacy-parcel/package.json
@@ -25,7 +25,7 @@
     "@codemirror/basic-setup": "^0.20.0",
     "@codemirror/language": "^0.20.0",
     "codemirror-graphql": "^2.0.2",
-    "graphql": "^16.8.1"
+    "graphql": "^16.9.0"
   },
   "devDependencies": {
     "parcel-bundler": "^1.12.4",
diff --git a/examples/cm6-graphql-parcel/package.json b/examples/cm6-graphql-parcel/package.json
index 890d04885d1..2b3770de34c 100644
--- a/examples/cm6-graphql-parcel/package.json
+++ b/examples/cm6-graphql-parcel/package.json
@@ -29,7 +29,7 @@
     "@codemirror/theme-one-dark": "6.0.0",
     "@codemirror/view": "6.1.2",
     "cm6-graphql": "0.0.1",
-    "graphql": "^16.8.1"
+    "graphql": "^16.9.0"
   },
   "devDependencies": {
     "parcel": "^2.6.2",
diff --git a/examples/graphiql-create-react-app/package.json b/examples/graphiql-create-react-app/package.json
index beac9385e65..1625bf662b2 100644
--- a/examples/graphiql-create-react-app/package.json
+++ b/examples/graphiql-create-react-app/package.json
@@ -4,7 +4,7 @@
   "private": true,
   "dependencies": {
     "graphiql": "^2.2.0",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-scripts": "5.0.1"
diff --git a/examples/graphiql-parcel/package.json b/examples/graphiql-parcel/package.json
index 53b1c11d246..293bd6c9ba6 100644
--- a/examples/graphiql-parcel/package.json
+++ b/examples/graphiql-parcel/package.json
@@ -23,7 +23,7 @@
   },
   "dependencies": {
     "graphiql": "^2.2.0",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0"
   },
diff --git a/examples/graphiql-webpack/package.json b/examples/graphiql-webpack/package.json
index f276c54542c..ecbc1338459 100644
--- a/examples/graphiql-webpack/package.json
+++ b/examples/graphiql-webpack/package.json
@@ -14,7 +14,7 @@
     "@graphiql/toolkit": "^0.9.2",
     "@graphiql/react": "^0.23.0",
     "graphiql": "^3.4.0",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "graphql-ws": "^5.5.5",
     "react": "^18.2.0",
     "regenerator-runtime": "^0.13.9"
diff --git a/examples/monaco-graphql-nextjs/package.json b/examples/monaco-graphql-nextjs/package.json
index 3d7c4dc95f3..6a952a96861 100644
--- a/examples/monaco-graphql-nextjs/package.json
+++ b/examples/monaco-graphql-nextjs/package.json
@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "@graphiql/toolkit": "^0.9.2",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "graphql-ws": "^5.5.5",
     "jsonc-parser": "^3.2.0",
     "marked": "^4.2.12",
diff --git a/examples/monaco-graphql-react-vite/package.json b/examples/monaco-graphql-react-vite/package.json
index fd4f8ce923a..465eed4cf8c 100644
--- a/examples/monaco-graphql-react-vite/package.json
+++ b/examples/monaco-graphql-react-vite/package.json
@@ -4,7 +4,7 @@
   "version": "0.0.0",
   "dependencies": {
     "@graphiql/toolkit": "^0.9.2",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "graphql-language-service": "^5.2.2",
     "jsonc-parser": "^3.2.0",
     "monaco-editor": "^0.39.0",
diff --git a/examples/monaco-graphql-webpack/package.json b/examples/monaco-graphql-webpack/package.json
index 093c7f662fe..44963c020ba 100644
--- a/examples/monaco-graphql-webpack/package.json
+++ b/examples/monaco-graphql-webpack/package.json
@@ -9,7 +9,7 @@
     "start": "cross-env NODE_ENV=development webpack-cli serve"
   },
   "dependencies": {
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "graphql-language-service": "^5.2.2",
     "json-schema": "^0.4.0",
     "jsonc-parser": "^3.2.0",
diff --git a/packages/cm6-graphql/package.json b/packages/cm6-graphql/package.json
index 74a3fb5832c..5a33799ce55 100644
--- a/packages/cm6-graphql/package.json
+++ b/packages/cm6-graphql/package.json
@@ -30,7 +30,7 @@
     "@lezer/highlight": "^1.0.0",
     "@lezer/lr": "^1.1.0",
     "esbuild": "0.18.10",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "rollup": "^2.60.2",
     "rollup-plugin-dts": "^4.0.1",
     "rollup-plugin-esbuild": "^4.9.1",
diff --git a/packages/codemirror-graphql/package.json b/packages/codemirror-graphql/package.json
index 23b29225446..9fcfa64eacb 100644
--- a/packages/codemirror-graphql/package.json
+++ b/packages/codemirror-graphql/package.json
@@ -51,7 +51,7 @@
     "@codemirror/language": "^6.0.0",
     "codemirror": "^5.65.3",
     "cross-env": "^7.0.2",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "rimraf": "^3.0.2",
     "sane": "2.0.0"
   }
diff --git a/packages/graphiql-plugin-code-exporter/package.json b/packages/graphiql-plugin-code-exporter/package.json
index 66ca389d957..bbac380204f 100644
--- a/packages/graphiql-plugin-code-exporter/package.json
+++ b/packages/graphiql-plugin-code-exporter/package.json
@@ -41,7 +41,7 @@
   "devDependencies": {
     "@graphiql/react": "^0.23.0",
     "@vitejs/plugin-react": "^4.3.1",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "postcss-nesting": "^10.1.7",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
diff --git a/packages/graphiql-plugin-explorer/package.json b/packages/graphiql-plugin-explorer/package.json
index ed4213f1c44..e6bf56bbcfc 100644
--- a/packages/graphiql-plugin-explorer/package.json
+++ b/packages/graphiql-plugin-explorer/package.json
@@ -40,7 +40,7 @@
   "devDependencies": {
     "@graphiql/react": "^0.23.0",
     "@vitejs/plugin-react": "^4.3.1",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "typescript": "^4.6.3",
diff --git a/packages/graphiql-react/package.json b/packages/graphiql-react/package.json
index 77b14bb8b4f..8b210faa4c3 100644
--- a/packages/graphiql-react/package.json
+++ b/packages/graphiql-react/package.json
@@ -70,7 +70,7 @@
     "@testing-library/react": "14.0.0",
     "@types/set-value": "^4.0.1",
     "@vitejs/plugin-react": "^4.3.1",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "postcss-nesting": "^10.1.7",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
diff --git a/packages/graphiql-toolkit/package.json b/packages/graphiql-toolkit/package.json
index 20face9b64a..de12f431f79 100644
--- a/packages/graphiql-toolkit/package.json
+++ b/packages/graphiql-toolkit/package.json
@@ -24,7 +24,7 @@
     "meros": "^1.1.4"
   },
   "devDependencies": {
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "graphql-ws": "^5.5.5",
     "isomorphic-fetch": "^3.0.0",
     "subscriptions-transport-ws": "0.11.0"
diff --git a/packages/graphiql/package.json b/packages/graphiql/package.json
index 23d505ad8a5..765cbdd9a57 100644
--- a/packages/graphiql/package.json
+++ b/packages/graphiql/package.json
@@ -55,7 +55,7 @@
     "cross-env": "^7.0.2",
     "cypress": "^13.13.2",
     "express": "^4.19.2",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "graphql-http": "^1.19.0",
     "graphql-subscriptions": "^2.0.0",
     "postcss": "8.4.31",
diff --git a/packages/graphiql/vite.config.mts b/packages/graphiql/vite.config.mts
index 23959e9a1d9..e5709514b9a 100644
--- a/packages/graphiql/vite.config.mts
+++ b/packages/graphiql/vite.config.mts
@@ -5,7 +5,9 @@ import commonjs from 'vite-plugin-commonjs';
 
 const umdConfig = defineConfig({
   define: {
-    'process.env.NODE_ENV': `"${process.env.NODE_ENV}"`,
+    // https://github.com/graphql/graphql-js/blob/16.x.x/website/docs/tutorials/going-to-production.md#vite
+    'globalThis.process': 'true',
+    'process.env.NODE_ENV': '"production"',
   },
   // To bundle `const { createClient } = require('graphql-ws')` in `createWebsocketsFetcherFromUrl` function
   plugins: [commonjs()],
diff --git a/packages/graphql-language-service-cli/package.json b/packages/graphql-language-service-cli/package.json
index 5aa65f3e105..5bb897de2ac 100644
--- a/packages/graphql-language-service-cli/package.json
+++ b/packages/graphql-language-service-cli/package.json
@@ -42,6 +42,6 @@
     "yargs": "^16.2.0"
   },
   "devDependencies": {
-    "graphql": "^16.8.1"
+    "graphql": "^16.9.0"
   }
 }
diff --git a/packages/graphql-language-service-server/package.json b/packages/graphql-language-service-server/package.json
index 98d39128804..4eba4248937 100644
--- a/packages/graphql-language-service-server/package.json
+++ b/packages/graphql-language-service-server/package.json
@@ -68,7 +68,7 @@
     "@types/mock-fs": "^4.13.4",
     "cross-env": "^7.0.2",
     "debounce-promise": "^3.1.2",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "mock-fs": "^5.2.0"
   }
 }
diff --git a/packages/graphql-language-service/package.json b/packages/graphql-language-service/package.json
index ac6b50ff1d3..193d4ea226b 100644
--- a/packages/graphql-language-service/package.json
+++ b/packages/graphql-language-service/package.json
@@ -45,7 +45,7 @@
     "@types/json-schema": "7.0.9",
     "@types/picomatch": "^2.3.0",
     "benchmark": "^2.1.4",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "graphql-config": "5.0.3",
     "lodash": "^4.17.15",
     "platform": "^1.3.5",
diff --git a/packages/monaco-graphql/package.json b/packages/monaco-graphql/package.json
index 7a08cd9ee81..15b7e2bcc8b 100644
--- a/packages/monaco-graphql/package.json
+++ b/packages/monaco-graphql/package.json
@@ -71,7 +71,7 @@
   },
   "devDependencies": {
     "execa": "^7.1.1",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "monaco-editor": "^0.39.0",
     "prettier": "3.3.2",
     "vscode-languageserver-types": "^3.17.1"
diff --git a/packages/monaco-graphql/test/monaco-editor.test.ts b/packages/monaco-graphql/test/monaco-editor.test.ts
index 018c5c05a52..d1a566717a9 100644
--- a/packages/monaco-graphql/test/monaco-editor.test.ts
+++ b/packages/monaco-graphql/test/monaco-editor.test.ts
@@ -13,7 +13,7 @@ describe('monaco-editor', () => {
     // expect(lines[0]).toBe('$ vite build');
     // expect(lines[1]).toMatch(' building for production...');
     // expect(lines[2]).toBe('transforming...');
-    expect(lines[3]).toMatch('✓ 843 modules transformed.');
+    expect(lines[3]).toMatch('✓ 844 modules transformed.');
     // expect(lines[4]).toBe('rendering chunks...');
     // expect(lines[5]).toBe('computing gzip size...');
     // expect(lines[6]).toMatch('dist/index.html');
diff --git a/packages/vscode-graphql-execution/package.json b/packages/vscode-graphql-execution/package.json
index 655e6dcd5f1..c7af7629bba 100644
--- a/packages/vscode-graphql-execution/package.json
+++ b/packages/vscode-graphql-execution/package.json
@@ -109,7 +109,7 @@
     "cosmiconfig": "8.2.0",
     "cosmiconfig-toml-loader": "^1.0.0",
     "dotenv": "10.0.0",
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "graphql-config": "5.0.3",
     "graphql-tag": "2.12.6",
     "graphql-ws": "5.10.0",
diff --git a/packages/vscode-graphql/package.json b/packages/vscode-graphql/package.json
index 775e8ca17c9..6aa26d92c70 100644
--- a/packages/vscode-graphql/package.json
+++ b/packages/vscode-graphql/package.json
@@ -179,7 +179,7 @@
     "ovsx": "0.8.3"
   },
   "dependencies": {
-    "graphql": "^16.8.1",
+    "graphql": "^16.9.0",
     "graphql-language-service-server": "^2.13.2",
     "vscode-languageclient": "8.0.2",
     "typescript": "^5.3.3"
diff --git a/yarn.lock b/yarn.lock
index 475b56b132e..60998acc168 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9871,10 +9871,10 @@ graphql-ws@5.14.0, graphql-ws@^5.5.5:
   resolved "https://registry.yarnpkg.com/graphql-ws/-/graphql-ws-5.14.0.tgz#766f249f3974fc2c48fae0d1fb20c2c4c79cd591"
   integrity sha512-itrUTQZP/TgswR4GSSYuwWUzrE/w5GhbwM2GX3ic2U7aw33jgEsayfIlvaj7/GcIvZgNMzsPTrE5hqPuFUiE5g==
 
-graphql@^16.8.1:
-  version "16.8.1"
-  resolved "https://registry.yarnpkg.com/graphql/-/graphql-16.8.1.tgz#1930a965bef1170603702acdb68aedd3f3cf6f07"
-  integrity sha512-59LZHPdGZVh695Ud9lRzPBVTtlX9ZCV150Er2W43ro37wVof0ctenSaskPPjN7lVTIN8mSZt8PHUNKZuNQUuxw==
+graphql@^16.9.0:
+  version "16.9.0"
+  resolved "https://registry.yarnpkg.com/graphql/-/graphql-16.9.0.tgz#1c310e63f16a49ce1fbb230bd0a000e99f6f115f"
+  integrity sha512-GGTKBX4SD7Wdb8mqeDLni2oaRGYQWjWHGKPQ24ZMnUtKfcsVoiv4uX8+LJr1K6U5VW2Lu1BwJnj7uiori0YtRw==
 
 handle-thing@^2.0.0:
   version "2.0.1"