diff --git a/.eslintrc.json b/.eslintrc.json
index b3c6ed7..657fb8b 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -14,7 +14,7 @@
   },
   "parser": "@typescript-eslint/parser",
   "parserOptions": {
-    "ecmaVersion": 2022,
+    "ecmaVersion": 2023,
     "sourceType": "module"
   },
   "plugins": [
diff --git a/package.json b/package.json
index 5c53ff9..b16b28b 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "@typescript-eslint/parser": "7.7.0",
     "@vercel/ncc": "0.38.1",
     "dotenv": "16.4.5",
-    "eslint": "9.0.0",
+    "eslint": "8.57.0",
     "eslint-config-google": "0.14.0",
     "jest": "29.7.0",
     "jest-circus": "29.7.0",
diff --git a/yarn.lock b/yarn.lock
index 1c26005..859a498 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -471,23 +471,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@eslint/eslintrc@npm:^3.0.2":
-  version: 3.0.2
-  resolution: "@eslint/eslintrc@npm:3.0.2"
-  dependencies:
-    ajv: "npm:^6.12.4"
-    debug: "npm:^4.3.2"
-    espree: "npm:^10.0.1"
-    globals: "npm:^14.0.0"
-    ignore: "npm:^5.2.0"
-    import-fresh: "npm:^3.2.1"
-    js-yaml: "npm:^4.1.0"
-    minimatch: "npm:^3.1.2"
-    strip-json-comments: "npm:^3.1.1"
-  checksum: 10c0/d8c92f06bdf8e2be9fcc0eeac4a9351745174adfcc72571ef3d179101cb55e19f15f6385c2a4f4945a3ba9245802d3371208e2e1e4f00f6bcf6b8711656af85a
-  languageName: node
-  linkType: hard
-
 "@eslint/js@npm:8.57.0":
   version: 8.57.0
   resolution: "@eslint/js@npm:8.57.0"
@@ -495,13 +478,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@eslint/js@npm:9.0.0":
-  version: 9.0.0
-  resolution: "@eslint/js@npm:9.0.0"
-  checksum: 10c0/ec3242a60a2525d2785d96d1e95b8060235f47f3b953aa81626968591ef8c1eb4f7f8b3647db2c97fdfa524eace949a5695be50521f64b8dcc4ed3b493ee409e
-  languageName: node
-  linkType: hard
-
 "@fastify/busboy@npm:^2.0.0":
   version: 2.1.1
   resolution: "@fastify/busboy@npm:2.1.1"
@@ -520,17 +496,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@humanwhocodes/config-array@npm:^0.12.3":
-  version: 0.12.3
-  resolution: "@humanwhocodes/config-array@npm:0.12.3"
-  dependencies:
-    "@humanwhocodes/object-schema": "npm:^2.0.3"
-    debug: "npm:^4.3.1"
-    minimatch: "npm:^3.0.5"
-  checksum: 10c0/7a97f1414c63f353557ff8ad2987774cbcd3ed87525909cc845b629518dd74dc92cacf8ac8dc4161549a87441f8c64802ac530ce879ddcbf2551a53ba73d03d1
-  languageName: node
-  linkType: hard
-
 "@humanwhocodes/module-importer@npm:^1.0.1":
   version: 1.0.1
   resolution: "@humanwhocodes/module-importer@npm:1.0.1"
@@ -538,7 +503,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@humanwhocodes/object-schema@npm:^2.0.2, @humanwhocodes/object-schema@npm:^2.0.3":
+"@humanwhocodes/object-schema@npm:^2.0.2":
   version: 2.0.3
   resolution: "@humanwhocodes/object-schema@npm:2.0.3"
   checksum: 10c0/80520eabbfc2d32fe195a93557cef50dfe8c8905de447f022675aaf66abc33ae54098f5ea78548d925aa671cd4ab7c7daa5ad704fe42358c9b5e7db60f80696c
@@ -1232,7 +1197,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"acorn@npm:^8.11.3, acorn@npm:^8.9.0":
+"acorn@npm:^8.9.0":
   version: 8.11.3
   resolution: "acorn@npm:8.11.3"
   bin:
@@ -1999,16 +1964,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"eslint-scope@npm:^8.0.1":
-  version: 8.0.1
-  resolution: "eslint-scope@npm:8.0.1"
-  dependencies:
-    esrecurse: "npm:^4.3.0"
-    estraverse: "npm:^5.2.0"
-  checksum: 10c0/0ec40ab284e58ac7ef064ecd23c127e03d339fa57173c96852336c73afc70ce5631da21dc1c772415a37a421291845538dd69db83c68d611044c0fde1d1fa269
-  languageName: node
-  linkType: hard
-
 "eslint-visitor-keys@npm:^3.3.0, eslint-visitor-keys@npm:^3.4.1, eslint-visitor-keys@npm:^3.4.3":
   version: 3.4.3
   resolution: "eslint-visitor-keys@npm:3.4.3"
@@ -2016,58 +1971,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"eslint-visitor-keys@npm:^4.0.0":
-  version: 4.0.0
-  resolution: "eslint-visitor-keys@npm:4.0.0"
-  checksum: 10c0/76619f42cf162705a1515a6868e6fc7567e185c7063a05621a8ac4c3b850d022661262c21d9f1fc1d144ecf0d5d64d70a3f43c15c3fc969a61ace0fb25698cf5
-  languageName: node
-  linkType: hard
-
-"eslint@npm:9.0.0":
-  version: 9.0.0
-  resolution: "eslint@npm:9.0.0"
-  dependencies:
-    "@eslint-community/eslint-utils": "npm:^4.2.0"
-    "@eslint-community/regexpp": "npm:^4.6.1"
-    "@eslint/eslintrc": "npm:^3.0.2"
-    "@eslint/js": "npm:9.0.0"
-    "@humanwhocodes/config-array": "npm:^0.12.3"
-    "@humanwhocodes/module-importer": "npm:^1.0.1"
-    "@nodelib/fs.walk": "npm:^1.2.8"
-    ajv: "npm:^6.12.4"
-    chalk: "npm:^4.0.0"
-    cross-spawn: "npm:^7.0.2"
-    debug: "npm:^4.3.2"
-    escape-string-regexp: "npm:^4.0.0"
-    eslint-scope: "npm:^8.0.1"
-    eslint-visitor-keys: "npm:^4.0.0"
-    espree: "npm:^10.0.1"
-    esquery: "npm:^1.4.2"
-    esutils: "npm:^2.0.2"
-    fast-deep-equal: "npm:^3.1.3"
-    file-entry-cache: "npm:^8.0.0"
-    find-up: "npm:^5.0.0"
-    glob-parent: "npm:^6.0.2"
-    graphemer: "npm:^1.4.0"
-    ignore: "npm:^5.2.0"
-    imurmurhash: "npm:^0.1.4"
-    is-glob: "npm:^4.0.0"
-    is-path-inside: "npm:^3.0.3"
-    json-stable-stringify-without-jsonify: "npm:^1.0.1"
-    levn: "npm:^0.4.1"
-    lodash.merge: "npm:^4.6.2"
-    minimatch: "npm:^3.1.2"
-    natural-compare: "npm:^1.4.0"
-    optionator: "npm:^0.9.3"
-    strip-ansi: "npm:^6.0.1"
-    text-table: "npm:^0.2.0"
-  bin:
-    eslint: bin/eslint.js
-  checksum: 10c0/ab23e45cfef5ec174fc165edc03e0d6655fd7e50fd18068e6d966e9640f0d0a9048244e1297569ba4fd1ccddcfc0b00fb0c9723caa4209e0b2b23139ae688368
-  languageName: node
-  linkType: hard
-
-"eslint@npm:^8.9.0":
+"eslint@npm:8.57.0, eslint@npm:^8.9.0":
   version: 8.57.0
   resolution: "eslint@npm:8.57.0"
   dependencies:
@@ -2115,17 +2019,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"espree@npm:^10.0.1":
-  version: 10.0.1
-  resolution: "espree@npm:10.0.1"
-  dependencies:
-    acorn: "npm:^8.11.3"
-    acorn-jsx: "npm:^5.3.2"
-    eslint-visitor-keys: "npm:^4.0.0"
-  checksum: 10c0/7c0f84afa0f9db7bb899619e6364ed832ef13fe8943691757ddde9a1805ae68b826ed66803323015f707a629a5507d0d290edda2276c25131fe0ad883b8b5636
-  languageName: node
-  linkType: hard
-
 "espree@npm:^9.6.0, espree@npm:^9.6.1":
   version: 9.6.1
   resolution: "espree@npm:9.6.1"
@@ -2284,15 +2177,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"file-entry-cache@npm:^8.0.0":
-  version: 8.0.0
-  resolution: "file-entry-cache@npm:8.0.0"
-  dependencies:
-    flat-cache: "npm:^4.0.0"
-  checksum: 10c0/9e2b5938b1cd9b6d7e3612bdc533afd4ac17b2fc646569e9a8abbf2eb48e5eb8e316bc38815a3ef6a1b456f4107f0d0f055a614ca613e75db6bf9ff4d72c1638
-  languageName: node
-  linkType: hard
-
 "fill-range@npm:^7.0.1":
   version: 7.0.1
   resolution: "fill-range@npm:7.0.1"
@@ -2333,16 +2217,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"flat-cache@npm:^4.0.0":
-  version: 4.0.1
-  resolution: "flat-cache@npm:4.0.1"
-  dependencies:
-    flatted: "npm:^3.2.9"
-    keyv: "npm:^4.5.4"
-  checksum: 10c0/2c59d93e9faa2523e4fda6b4ada749bed432cfa28c8e251f33b25795e426a1c6dbada777afb1f74fcfff33934fdbdea921ee738fcc33e71adc9d6eca984a1cfc
-  languageName: node
-  linkType: hard
-
 "flatted@npm:^3.2.9":
   version: 3.3.1
   resolution: "flatted@npm:3.3.1"
@@ -2547,13 +2421,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"globals@npm:^14.0.0":
-  version: 14.0.0
-  resolution: "globals@npm:14.0.0"
-  checksum: 10c0/b96ff42620c9231ad468d4c58ff42afee7777ee1c963013ff8aabe095a451d0ceeb8dcd8ef4cbd64d2538cef45f787a78ba3a9574f4a634438963e334471302d
-  languageName: node
-  linkType: hard
-
 "globby@npm:^11.1.0":
   version: 11.1.0
   resolution: "globby@npm:11.1.0"
@@ -3459,7 +3326,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"keyv@npm:^4.5.3, keyv@npm:^4.5.4":
+"keyv@npm:^4.5.3":
   version: 4.5.4
   resolution: "keyv@npm:4.5.4"
   dependencies:
@@ -4602,7 +4469,7 @@ __metadata:
     cross-fetch: "npm:4.0.0"
     deepl-node: "npm:1.13.0"
     dotenv: "npm:16.4.5"
-    eslint: "npm:9.0.0"
+    eslint: "npm:8.57.0"
     eslint-config-google: "npm:0.14.0"
     google-translate-api-x: "npm:10.6.8"
     jest: "npm:29.7.0"