diff --git a/tools/ci-codex/package-lock.json b/tools/ci-codex/package-lock.json
index 2c73981..e0e5c00 100644
--- a/tools/ci-codex/package-lock.json
+++ b/tools/ci-codex/package-lock.json
@@ -6,13 +6,13 @@
     "": {
       "name": "codex-switch-ci-client",
       "dependencies": {
-        "@openai/codex": "0.164.0"
+        "@openai/codex": "0.166.0"
       }
     },
     "node_modules/@openai/codex": {
-      "version": "0.164.0",
-      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.164.0.tgz",
-      "integrity": "sha512-TWj7UGyPRe3Pj/A3ddNAxs1te3a/W/xAd+J0LHrrFTmsSfahGMOLF/vn88D3QCIgAT3B1rm1y/Z3NYE0rx6cZQ==",
+      "version": "0.166.0",
+      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.166.0.tgz",
+      "integrity": "sha512-2Szlp1l1cz5TX1ccpX4Zok3DZrot9xeZe0km+6/1v8JmqxADwyJxKBJah4dBymkwtS25j/u6dipJusTOI97Z8Q==",
       "license": "Apache-2.0",
       "bin": {
         "codex": "bin/codex.js"
@@ -21,19 +21,19 @@
         "node": ">=16"
       },
       "optionalDependencies": {
-        "@openai/codex-darwin-arm64": "npm:@openai/codex@0.164.0-darwin-arm64",
-        "@openai/codex-darwin-x64": "npm:@openai/codex@0.164.0-darwin-x64",
-        "@openai/codex-linux-arm64": "npm:@openai/codex@0.164.0-linux-arm64",
-        "@openai/codex-linux-x64": "npm:@openai/codex@0.164.0-linux-x64",
-        "@openai/codex-win32-arm64": "npm:@openai/codex@0.164.0-win32-arm64",
-        "@openai/codex-win32-x64": "npm:@openai/codex@0.164.0-win32-x64"
+        "@openai/codex-darwin-arm64": "npm:@openai/codex@0.166.0-darwin-arm64",
+        "@openai/codex-darwin-x64": "npm:@openai/codex@0.166.0-darwin-x64",
+        "@openai/codex-linux-arm64": "npm:@openai/codex@0.166.0-linux-arm64",
+        "@openai/codex-linux-x64": "npm:@openai/codex@0.166.0-linux-x64",
+        "@openai/codex-win32-arm64": "npm:@openai/codex@0.166.0-win32-arm64",
+        "@openai/codex-win32-x64": "npm:@openai/codex@0.166.0-win32-x64"
       }
     },
     "node_modules/@openai/codex-darwin-arm64": {
       "name": "@openai/codex",
-      "version": "0.164.0-darwin-arm64",
-      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.164.0-darwin-arm64.tgz",
-      "integrity": "sha512-pDizgOUAtq3/k3AbUFHbaU19WpYKCja+oFpNSTLKrDQj4lTUNSDuTPJip4uQVn2/1EipQdpQrGMOQBVuI1znAA==",
+      "version": "0.166.0-darwin-arm64",
+      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.166.0-darwin-arm64.tgz",
+      "integrity": "sha512-5fWH6qqUInACcRADIewjlnRxDb4QLe0uriwehiZz0+viuAAB8I+WWefqw4xwHvyKaxeiGX4uK56+vrgfvFk3FQ==",
       "cpu": [
         "arm64"
       ],
@@ -48,9 +48,9 @@
     },
     "node_modules/@openai/codex-darwin-x64": {
       "name": "@openai/codex",
-      "version": "0.164.0-darwin-x64",
-      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.164.0-darwin-x64.tgz",
-      "integrity": "sha512-lIe+udnguPGzBezkgbkj2Eaz0YqOhNXT7jja136Fj0sXfI+UKNS2icmaK14GcoRAgeVEpDTtC1ftamWBPmD1zg==",
+      "version": "0.166.0-darwin-x64",
+      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.166.0-darwin-x64.tgz",
+      "integrity": "sha512-Vj5wXJPizKmrzNtnRNQf9PP6FJkG3iJU/UO3NE4WvkENZGoQfmImdwf4MVRI5NgwjSuC6LT0HbBRHPVVnwGHuw==",
       "cpu": [
         "x64"
       ],
@@ -65,9 +65,9 @@
     },
     "node_modules/@openai/codex-linux-arm64": {
       "name": "@openai/codex",
-      "version": "0.164.0-linux-arm64",
-      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.164.0-linux-arm64.tgz",
-      "integrity": "sha512-LL5iTQjyDL4YRX44EWqhIfEQ5uGnmgxkQBJSxjZSeJ8L1Og83pdlzUJW/PRJ76oaVwOVgh6HXwuPEiBNEHU4lg==",
+      "version": "0.166.0-linux-arm64",
+      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.166.0-linux-arm64.tgz",
+      "integrity": "sha512-w0ScAsBr9aZKtIFrh6HN6KU2yjKKeSCzYfbb7DB0Ccj4BYPzeZtUeQprbycLCwuX3AFQdbdjapmLho2iot74jQ==",
       "cpu": [
         "arm64"
       ],
@@ -82,9 +82,9 @@
     },
     "node_modules/@openai/codex-linux-x64": {
       "name": "@openai/codex",
-      "version": "0.164.0-linux-x64",
-      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.164.0-linux-x64.tgz",
-      "integrity": "sha512-XLAoaWsGOT2khzl+P4FYDPTkzAr9W0VFXFaVkqlFdkM0soa1gH/4S0wSD57Ek3HHwkirAEGz2/Mwehseh+l5Mg==",
+      "version": "0.166.0-linux-x64",
+      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.166.0-linux-x64.tgz",
+      "integrity": "sha512-CxDm3+D1cpbGJeHrdzINoG+3wn9BVncP4qpZaaNYkxe8iPtRJOYyCJnnPoVjWRIBvI9vPKbRoifsMSA5xDaUpw==",
       "cpu": [
         "x64"
       ],
@@ -99,9 +99,9 @@
     },
     "node_modules/@openai/codex-win32-arm64": {
       "name": "@openai/codex",
-      "version": "0.164.0-win32-arm64",
-      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.164.0-win32-arm64.tgz",
-      "integrity": "sha512-Zkzt8HNmB/vOnlDo5D7IOlrt5rHaxYQB7iGbNP7bHcXZtrk6gaD7UriwaieGYJpcf8DqAT/0tqzY4xbs8ZwbmQ==",
+      "version": "0.166.0-win32-arm64",
+      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.166.0-win32-arm64.tgz",
+      "integrity": "sha512-LWO1cyGlxbKgeUM7QJ1a6QMSsJi++3PqgIi6BmIUBoj/kzZqRIR69UDMQgeU/9izzJFYMSbwt++lHnUFyjQXlA==",
       "cpu": [
         "arm64"
       ],
@@ -116,9 +116,9 @@
     },
     "node_modules/@openai/codex-win32-x64": {
       "name": "@openai/codex",
-      "version": "0.164.0-win32-x64",
-      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.164.0-win32-x64.tgz",
-      "integrity": "sha512-urWPhwh9YavuoAPIkmVYKBTtd5OtGVL4Ki0Fb28dhK/Mz6Pt4LSy+gbRrZFz5+RXrw9ubvXuXDCcd8beYcWhDg==",
+      "version": "0.166.0-win32-x64",
+      "resolved": "https://registry.npmjs.org/@openai/codex/-/codex-0.166.0-win32-x64.tgz",
+      "integrity": "sha512-NS8Ps5oG5r19pCrMCUXwUqOui6odnUIoBlQkrjCJ+h1k6KiwCzC/+mI9d3nSZCqFoVONPBTmqyq8NYq3YaFGyA==",
       "cpu": [
         "x64"
       ],
diff --git a/tools/ci-codex/package.json b/tools/ci-codex/package.json
index 13ea2f7..70a6895 100644
--- a/tools/ci-codex/package.json
+++ b/tools/ci-codex/package.json
@@ -3,6 +3,6 @@
   "private": true,
   "description": "Pinned official Codex CLI prerequisite for isolated app-server checks; not part of the shipped application.",
   "dependencies": {
-    "@openai/codex": "0.164.0"
+    "@openai/codex": "0.166.0"
   }
 }