diff --git a/package-lock.json b/package-lock.json
index e46caecb2..bb8b37a67 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -43,7 +43,7 @@
         "zod": "^4.4.3"
       },
       "devDependencies": {
-        "chai": "4.5.0",
+        "chai": "6.2.2",
         "eslint": "^10.7.0",
         "eslint-config-google": "^0.14.0",
         "express-openapi-validator": "^5.6.2",
@@ -2027,16 +2027,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/assertion-error": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.1.0.tgz",
-      "integrity": "sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": "*"
-      }
-    },
     "node_modules/async-function": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/async-function/-/async-function-1.0.0.tgz",
@@ -2467,22 +2457,13 @@
       }
     },
     "node_modules/chai": {
-      "version": "4.5.0",
-      "resolved": "https://registry.npmjs.org/chai/-/chai-4.5.0.tgz",
-      "integrity": "sha512-RITGBfijLkBddZvnn8jdqoTypxvqbOLYQkGGxXzeFjVHvudaPw0HNFD9x928/eUwYWd2dPCugVqspGALTZZQKw==",
+      "version": "6.2.2",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-6.2.2.tgz",
+      "integrity": "sha512-NUPRluOfOiTKBKvWPtSD4PhFvWCqOi0BGStNWs57X9js7XGTprSmFoz5F0tWhR4WPjNeR9jXqdC7/UpSJTnlRg==",
       "dev": true,
       "license": "MIT",
-      "dependencies": {
-        "assertion-error": "^1.1.0",
-        "check-error": "^1.0.3",
-        "deep-eql": "^4.1.3",
-        "get-func-name": "^2.0.2",
-        "loupe": "^2.3.6",
-        "pathval": "^1.1.1",
-        "type-detect": "^4.1.0"
-      },
       "engines": {
-        "node": ">=4"
+        "node": ">=18"
       }
     },
     "node_modules/chalk": {
@@ -2524,19 +2505,6 @@
         "node": ">=16"
       }
     },
-    "node_modules/check-error": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/check-error/-/check-error-1.0.3.tgz",
-      "integrity": "sha512-iKEoDYaRmd1mxM90a2OEfWhjsjPpYPuQ+lMYsoxB126+t8fw7ySEO48nmDg5COTjxDI65/Y2OWpeEHk3ZOe8zg==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "get-func-name": "^2.0.2"
-      },
-      "engines": {
-        "node": "*"
-      }
-    },
     "node_modules/chokidar": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-4.0.3.tgz",
@@ -2839,19 +2807,6 @@
         "node": ">=0.10.0"
       }
     },
-    "node_modules/deep-eql": {
-      "version": "4.1.4",
-      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-4.1.4.tgz",
-      "integrity": "sha512-SUwdGfqdKOwxCPeVYjwSyRpJ7Z+fhpwIAtmCUdZIWZ/YP5R9WAsyuSgpLVDi9bjWoN2LXHNss/dk3urXtdQxGg==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "type-detect": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/deep-is": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.4.tgz",
@@ -4177,16 +4132,6 @@
         "node": "6.* || 8.* || >= 10.*"
       }
     },
-    "node_modules/get-func-name": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/get-func-name/-/get-func-name-2.0.2.tgz",
-      "integrity": "sha512-8vXOvuE167CtIc3OyItco7N/dpRtBbYOsPsXCz7X/PMnlGjYjSGuZJgM1Y7mmew7BKf9BqvLX2tnOVy1BBUsxQ==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": "*"
-      }
-    },
     "node_modules/get-intrinsic": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.3.0.tgz",
@@ -5636,16 +5581,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/loupe": {
-      "version": "2.3.7",
-      "resolved": "https://registry.npmjs.org/loupe/-/loupe-2.3.7.tgz",
-      "integrity": "sha512-zSMINGVYkdpYSOBmLi0D1Uo7JU9nVdQKrHxC8eYlV+9YKK9WePqAlL7lSlorG/U2Fw1w0hTBmaa/jrQ3UbPHtA==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "get-func-name": "^2.0.1"
-      }
-    },
     "node_modules/lru-cache": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
@@ -6846,16 +6781,6 @@
         "url": "https://opencollective.com/express"
       }
     },
-    "node_modules/pathval": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/pathval/-/pathval-1.1.1.tgz",
-      "integrity": "sha512-Dp6zGqpTdETdR63lehJYPeIOqpiNBNtc7BpWSLrOje7UaIsE5aY92r/AunQA7rsXvet3lrJ3JnZX29UPTKXyKQ==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": "*"
-      }
-    },
     "node_modules/picocolors": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
diff --git a/package.json b/package.json
index 584e5ebd1..664bce1ed 100644
--- a/package.json
+++ b/package.json
@@ -109,7 +109,7 @@
     "zod": "^4.4.3"
   },
   "devDependencies": {
-    "chai": "4.5.0",
+    "chai": "6.2.2",
     "eslint": "^10.7.0",
     "eslint-config-google": "^0.14.0",
     "express-openapi-validator": "^5.6.2",