diff --git a/package.json b/package.json
index 2593b43..4d415fd 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
   "license": "MIT",
   "devDependencies": {
     "cookie-parser": "1.4.6",
-    "eslint": "8.57.0",
+    "eslint": "9.0.0",
     "express": "4.19.2",
     "i18n": "0.15.1",
     "mocha": "10.4.0",
diff --git a/yarn.lock b/yarn.lock
index 5a0ac1b..c9c4eb1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -222,11 +222,31 @@
     minimatch "^3.1.2"
     strip-json-comments "^3.1.1"
 
+"@eslint/eslintrc@^3.0.2":
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/@eslint/eslintrc/-/eslintrc-3.0.2.tgz#36180f8e85bf34d2fe3ccc2261e8e204a411ab4e"
+  integrity sha512-wV19ZEGEMAC1eHgrS7UQPqsdEiCIbTKTasEfcXAigzoXICcqZSjBZEHlZwNVvKg6UBCjSlos84XiLqsRJnIcIg==
+  dependencies:
+    ajv "^6.12.4"
+    debug "^4.3.2"
+    espree "^10.0.1"
+    globals "^14.0.0"
+    ignore "^5.2.0"
+    import-fresh "^3.2.1"
+    js-yaml "^4.1.0"
+    minimatch "^3.1.2"
+    strip-json-comments "^3.1.1"
+
 "@eslint/js@8.57.0":
   version "8.57.0"
   resolved "https://registry.yarnpkg.com/@eslint/js/-/js-8.57.0.tgz#a5417ae8427873f1dd08b70b3574b453e67b5f7f"
   integrity sha512-Ys+3g2TaW7gADOJzPt83SJtCDhMjndcDMFVQ/Tj9iA1BfJzFKD9mAUXT3OenpuPHbI6P/myECxRJrofUsDx/5g==
 
+"@eslint/js@9.0.0":
+  version "9.0.0"
+  resolved "https://registry.yarnpkg.com/@eslint/js/-/js-9.0.0.tgz#1a9e4b4c96d8c7886e0110ed310a0135144a1691"
+  integrity sha512-RThY/MnKrhubF6+s1JflwUjPEsnCEmYCWwqa/aRISKWNXGZ9epUwft4bUMM35SdKF9xvBrLydAM1RDHd1Z//ZQ==
+
 "@humanwhocodes/config-array@^0.11.14":
   version "0.11.14"
   resolved "https://registry.yarnpkg.com/@humanwhocodes/config-array/-/config-array-0.11.14.tgz#d78e481a039f7566ecc9660b4ea7fe6b1fec442b"
@@ -236,12 +256,21 @@
     debug "^4.3.1"
     minimatch "^3.0.5"
 
+"@humanwhocodes/config-array@^0.12.3":
+  version "0.12.3"
+  resolved "https://registry.yarnpkg.com/@humanwhocodes/config-array/-/config-array-0.12.3.tgz#a6216d90f81a30bedd1d4b5d799b47241f318072"
+  integrity sha512-jsNnTBlMWuTpDkeE3on7+dWJi0D6fdDfeANj/w7MpS8ztROCoLvIO2nG0CcFj+E4k8j4QrSTh4Oryi3i2G669g==
+  dependencies:
+    "@humanwhocodes/object-schema" "^2.0.3"
+    debug "^4.3.1"
+    minimatch "^3.0.5"
+
 "@humanwhocodes/module-importer@^1.0.1":
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/@humanwhocodes/module-importer/-/module-importer-1.0.1.tgz#af5b2691a22b44be847b0ca81641c5fb6ad0172c"
   integrity sha512-bxveV4V8v5Yb4ncFTT3rPSgZBOpCkjfK0y4oVVVJwIuDVBRMDXrPyXRL988i5ap9m9bnyEEjWfm5WkBmtffLfA==
 
-"@humanwhocodes/object-schema@^2.0.2":
+"@humanwhocodes/object-schema@^2.0.2", "@humanwhocodes/object-schema@^2.0.3":
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/@humanwhocodes/object-schema/-/object-schema-2.0.3.tgz#4a2868d75d6d6963e423bcf90b7fd1be343409d3"
   integrity sha512-93zYdMES/c1D69yZiKDBj0V24vqNzB/koF26KPaagAfd3P/4gUlh3Dys5ogAK+Exi9QyzlD8x/08Zt7wIKcDcA==
@@ -396,7 +425,7 @@ acorn-jsx@^5.3.2:
   resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-5.3.2.tgz#7ed5bb55908b3b2f1bc55c6af1653bada7f07937"
   integrity sha512-rq9s+JNhf0IChjtDXxllJ7g41oZk5SlXtp0LHwyA5cejwn7vKmKp4pPri6YEePv2PU65sAsegbXtIinmDFDXgQ==
 
-acorn@^8.9.0:
+acorn@^8.11.3, acorn@^8.9.0:
   version "8.11.3"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.11.3.tgz#71e0b14e13a4ec160724b38fb7b0f233b1b81d7a"
   integrity sha512-Y9rRfJG5jcKOE0CLisYbojUjIrIEE7AGMzA/Sm4BslANhbS+cDMpgBdcPT91oJ7OuJ9hYJBx59RjbhxVnrF8Xg==
@@ -954,12 +983,65 @@ eslint-scope@^7.2.2:
     esrecurse "^4.3.0"
     estraverse "^5.2.0"
 
+eslint-scope@^8.0.1:
+  version "8.0.1"
+  resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-8.0.1.tgz#a9601e4b81a0b9171657c343fb13111688963cfc"
+  integrity sha512-pL8XjgP4ZOmmwfFE8mEhSxA7ZY4C+LWyqjQ3o4yWkkmD0qcMT9kkW3zWHOczhWcjTSgqycYAgwSlXvZltv65og==
+  dependencies:
+    esrecurse "^4.3.0"
+    estraverse "^5.2.0"
+
 eslint-visitor-keys@^3.3.0, eslint-visitor-keys@^3.4.1, eslint-visitor-keys@^3.4.3:
   version "3.4.3"
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-3.4.3.tgz#0cd72fe8550e3c2eae156a96a4dddcd1c8ac5800"
   integrity sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag==
 
-eslint@8.57.0, eslint@^8.47.0:
+eslint-visitor-keys@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-4.0.0.tgz#e3adc021aa038a2a8e0b2f8b0ce8f66b9483b1fb"
+  integrity sha512-OtIRv/2GyiF6o/d8K7MYKKbXrOUBIK6SfkIRM4Z0dY3w+LiQ0vy3F57m0Z71bjbyeiWFiHJ8brqnmE6H6/jEuw==
+
+eslint@9.0.0:
+  version "9.0.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-9.0.0.tgz#6270548758e390343f78c8afd030566d86927d40"
+  integrity sha512-IMryZ5SudxzQvuod6rUdIUz29qFItWx281VhtFVc2Psy/ZhlCeD/5DT6lBIJ4H3G+iamGJoTln1v+QSuPw0p7Q==
+  dependencies:
+    "@eslint-community/eslint-utils" "^4.2.0"
+    "@eslint-community/regexpp" "^4.6.1"
+    "@eslint/eslintrc" "^3.0.2"
+    "@eslint/js" "9.0.0"
+    "@humanwhocodes/config-array" "^0.12.3"
+    "@humanwhocodes/module-importer" "^1.0.1"
+    "@nodelib/fs.walk" "^1.2.8"
+    ajv "^6.12.4"
+    chalk "^4.0.0"
+    cross-spawn "^7.0.2"
+    debug "^4.3.2"
+    escape-string-regexp "^4.0.0"
+    eslint-scope "^8.0.1"
+    eslint-visitor-keys "^4.0.0"
+    espree "^10.0.1"
+    esquery "^1.4.2"
+    esutils "^2.0.2"
+    fast-deep-equal "^3.1.3"
+    file-entry-cache "^8.0.0"
+    find-up "^5.0.0"
+    glob-parent "^6.0.2"
+    graphemer "^1.4.0"
+    ignore "^5.2.0"
+    imurmurhash "^0.1.4"
+    is-glob "^4.0.0"
+    is-path-inside "^3.0.3"
+    json-stable-stringify-without-jsonify "^1.0.1"
+    levn "^0.4.1"
+    lodash.merge "^4.6.2"
+    minimatch "^3.1.2"
+    natural-compare "^1.4.0"
+    optionator "^0.9.3"
+    strip-ansi "^6.0.1"
+    text-table "^0.2.0"
+
+eslint@^8.47.0:
   version "8.57.0"
   resolved "https://registry.yarnpkg.com/eslint/-/eslint-8.57.0.tgz#c786a6fd0e0b68941aaf624596fb987089195668"
   integrity sha512-dZ6+mexnaTIbSBZWgou51U6OmzIhYM2VcNdtiTtI7qPNZm35Akpr0f6vtw3w1Kmn5PYo+tZVfh13WrhpS6oLqQ==
@@ -1003,6 +1085,15 @@ eslint@8.57.0, eslint@^8.47.0:
     strip-ansi "^6.0.1"
     text-table "^0.2.0"
 
+espree@^10.0.1:
+  version "10.0.1"
+  resolved "https://registry.yarnpkg.com/espree/-/espree-10.0.1.tgz#600e60404157412751ba4a6f3a2ee1a42433139f"
+  integrity sha512-MWkrWZbJsL2UwnjxTX3gG8FneachS/Mwg7tdGXce011sJd5b0JG54vat5KHnfSBODZ3Wvzd2WnjxyzsRoVv+ww==
+  dependencies:
+    acorn "^8.11.3"
+    acorn-jsx "^5.3.2"
+    eslint-visitor-keys "^4.0.0"
+
 espree@^9.6.0, espree@^9.6.1:
   version "9.6.1"
   resolved "https://registry.yarnpkg.com/espree/-/espree-9.6.1.tgz#a2a17b8e434690a5432f2f8018ce71d331a48c6f"
@@ -1124,6 +1215,13 @@ file-entry-cache@^6.0.1:
   dependencies:
     flat-cache "^3.0.4"
 
+file-entry-cache@^8.0.0:
+  version "8.0.0"
+  resolved "https://registry.yarnpkg.com/file-entry-cache/-/file-entry-cache-8.0.0.tgz#7787bddcf1131bffb92636c69457bbc0edd6d81f"
+  integrity sha512-XXTUwCvisa5oacNGRP9SfNtYBNAMi+RPwBFmblZEF7N7swHYQS6/Zfk7SRwx4D5j3CH211YNRco1DEMNVfZCnQ==
+  dependencies:
+    flat-cache "^4.0.0"
+
 fill-range@^7.0.1:
   version "7.0.1"
   resolved "https://registry.yarnpkg.com/fill-range/-/fill-range-7.0.1.tgz#1919a6a7c75fe38b2c7c77e5198535da9acdda40"
@@ -1178,6 +1276,14 @@ flat-cache@^3.0.4:
     keyv "^4.5.3"
     rimraf "^3.0.2"
 
+flat-cache@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/flat-cache/-/flat-cache-4.0.1.tgz#0ece39fcb14ee012f4b0410bd33dd9c1f011127c"
+  integrity sha512-f7ccFPK3SXFHpx15UIGyRJ/FJQctuKZ0zVuN3frBo4HnK3cay9VEW0R6yPYFHC0AgqhukPzKjq22t5DmAyqGyw==
+  dependencies:
+    flatted "^3.2.9"
+    keyv "^4.5.4"
+
 flat@^5.0.2:
   version "5.0.2"
   resolved "https://registry.yarnpkg.com/flat/-/flat-5.0.2.tgz#8ca6fe332069ffa9d324c327198c598259ceb241"
@@ -1339,6 +1445,11 @@ globals@^13.19.0:
   dependencies:
     type-fest "^0.20.2"
 
+globals@^14.0.0:
+  version "14.0.0"
+  resolved "https://registry.yarnpkg.com/globals/-/globals-14.0.0.tgz#898d7413c29babcf6bafe56fcadded858ada724e"
+  integrity sha512-oahGvuMGQlPw/ivIYBjVSrWAfWLBeku5tpPE2fOPLi+WHffIWbuh2tCjhyQhTBPMf5E9jDEH4FOmTYgYwbKwtQ==
+
 gopd@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/gopd/-/gopd-1.0.1.tgz#29ff76de69dac7489b7c0918a5788e56477c332c"
@@ -1695,7 +1806,7 @@ json5@^2.2.3:
   resolved "https://registry.yarnpkg.com/json5/-/json5-2.2.3.tgz#78cd6f1a19bdc12b73db5ad0c61efd66c1e29283"
   integrity sha512-XmOWe7eyHYH14cLdVPoyg+GOH3rYX++KpzrylJwSW98t3Nk+U8XOl8FWKOgwtzdb8lXGf6zYwDUzeHMWfxasyg==
 
-keyv@^4.5.3:
+keyv@^4.5.3, keyv@^4.5.4:
   version "4.5.4"
   resolved "https://registry.yarnpkg.com/keyv/-/keyv-4.5.4.tgz#a879a99e29452f942439f2a405e3af8b31d4de93"
   integrity sha512-oxVHkHR/EJf2CNXnWxRLW6mg7JyCCUcG0DtEGmL2ctUo1PNTin1PUil+r/+4r5MpVgC/fn1kjsx7mjSujKqIpw==