diff --git a/package.json b/package.json
index 8e6f3fd..ab9c8c8 100644
--- a/package.json
+++ b/package.json
@@ -31,8 +31,8 @@
         "@ava/typescript": "2.0.0",
         "@keiryo/eslint-config": "^1.0.1",
         "@types/node": "v14",
-        "@typescript-eslint/eslint-plugin": "4.31.2",
-        "@typescript-eslint/parser": "4.31.2",
+        "@typescript-eslint/eslint-plugin": "4.33.0",
+        "@typescript-eslint/parser": "4.33.0",
         "ava": "3.15.0",
         "eslint": "7.32.0",
         "form-data": "^4.0.0",
diff --git a/yarn.lock b/yarn.lock
index 1fdefd4..df114c2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -134,73 +134,74 @@
   resolved "https://registry.yarnpkg.com/@types/normalize-package-data/-/normalize-package-data-2.4.0.tgz#e486d0d97396d79beedd0a6e33f4534ff6b4973e"
   integrity sha512-f5j5b/Gf71L+dbqxIpQ4Z2WlmI/mPJ0fOkGGmFgtb6sAu97EPczzbS3/tJKxmcYDj55OX6ssqwDAWOHIYDRDGA==
 
-"@typescript-eslint/eslint-plugin@4.31.2":
-  version "4.31.2"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-4.31.2.tgz#9f41efaee32cdab7ace94b15bd19b756dd099b0a"
-  integrity sha512-w63SCQ4bIwWN/+3FxzpnWrDjQRXVEGiTt9tJTRptRXeFvdZc/wLiz3FQUwNQ2CVoRGI6KUWMNUj/pk63noUfcA==
+"@typescript-eslint/eslint-plugin@4.33.0":
+  version "4.33.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-4.33.0.tgz#c24dc7c8069c7706bc40d99f6fa87edcb2005276"
+  integrity sha512-aINiAxGVdOl1eJyVjaWn/YcVAq4Gi/Yo35qHGCnqbWVz61g39D0h23veY/MA0rFFGfxK7TySg2uwDeNv+JgVpg==
   dependencies:
-    "@typescript-eslint/experimental-utils" "4.31.2"
-    "@typescript-eslint/scope-manager" "4.31.2"
+    "@typescript-eslint/experimental-utils" "4.33.0"
+    "@typescript-eslint/scope-manager" "4.33.0"
     debug "^4.3.1"
     functional-red-black-tree "^1.0.1"
+    ignore "^5.1.8"
     regexpp "^3.1.0"
     semver "^7.3.5"
     tsutils "^3.21.0"
 
-"@typescript-eslint/experimental-utils@4.31.2":
-  version "4.31.2"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-4.31.2.tgz#98727a9c1e977dd5d20c8705e69cd3c2a86553fa"
-  integrity sha512-3tm2T4nyA970yQ6R3JZV9l0yilE2FedYg8dcXrTar34zC9r6JB7WyBQbpIVongKPlhEMjhQ01qkwrzWy38Bk1Q==
+"@typescript-eslint/experimental-utils@4.33.0":
+  version "4.33.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-4.33.0.tgz#6f2a786a4209fa2222989e9380b5331b2810f7fd"
+  integrity sha512-zeQjOoES5JFjTnAhI5QY7ZviczMzDptls15GFsI6jyUOq0kOf9+WonkhtlIhh0RgHRnqj5gdNxW5j1EvAyYg6Q==
   dependencies:
     "@types/json-schema" "^7.0.7"
-    "@typescript-eslint/scope-manager" "4.31.2"
-    "@typescript-eslint/types" "4.31.2"
-    "@typescript-eslint/typescript-estree" "4.31.2"
+    "@typescript-eslint/scope-manager" "4.33.0"
+    "@typescript-eslint/types" "4.33.0"
+    "@typescript-eslint/typescript-estree" "4.33.0"
     eslint-scope "^5.1.1"
     eslint-utils "^3.0.0"
 
-"@typescript-eslint/parser@4.31.2":
-  version "4.31.2"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-4.31.2.tgz#54aa75986e3302d91eff2bbbaa6ecfa8084e9c34"
-  integrity sha512-EcdO0E7M/sv23S/rLvenHkb58l3XhuSZzKf6DBvLgHqOYdL6YFMYVtreGFWirxaU2mS1GYDby3Lyxco7X5+Vjw==
+"@typescript-eslint/parser@4.33.0":
+  version "4.33.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-4.33.0.tgz#dfe797570d9694e560528d18eecad86c8c744899"
+  integrity sha512-ZohdsbXadjGBSK0/r+d87X0SBmKzOq4/S5nzK6SBgJspFo9/CUDJ7hjayuze+JK7CZQLDMroqytp7pOcFKTxZA==
   dependencies:
-    "@typescript-eslint/scope-manager" "4.31.2"
-    "@typescript-eslint/types" "4.31.2"
-    "@typescript-eslint/typescript-estree" "4.31.2"
+    "@typescript-eslint/scope-manager" "4.33.0"
+    "@typescript-eslint/types" "4.33.0"
+    "@typescript-eslint/typescript-estree" "4.33.0"
     debug "^4.3.1"
 
-"@typescript-eslint/scope-manager@4.31.2":
-  version "4.31.2"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-4.31.2.tgz#1d528cb3ed3bcd88019c20a57c18b897b073923a"
-  integrity sha512-2JGwudpFoR/3Czq6mPpE8zBPYdHWFGL6lUNIGolbKQeSNv4EAiHaR5GVDQaLA0FwgcdcMtRk+SBJbFGL7+La5w==
+"@typescript-eslint/scope-manager@4.33.0":
+  version "4.33.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-4.33.0.tgz#d38e49280d983e8772e29121cf8c6e9221f280a3"
+  integrity sha512-5IfJHpgTsTZuONKbODctL4kKuQje/bzBRkwHE8UOZ4f89Zeddg+EGZs8PD8NcN4LdM3ygHWYB3ukPAYjvl/qbQ==
   dependencies:
-    "@typescript-eslint/types" "4.31.2"
-    "@typescript-eslint/visitor-keys" "4.31.2"
+    "@typescript-eslint/types" "4.33.0"
+    "@typescript-eslint/visitor-keys" "4.33.0"
 
-"@typescript-eslint/types@4.31.2":
-  version "4.31.2"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-4.31.2.tgz#2aea7177d6d744521a168ed4668eddbd912dfadf"
-  integrity sha512-kWiTTBCTKEdBGrZKwFvOlGNcAsKGJSBc8xLvSjSppFO88AqGxGNYtF36EuEYG6XZ9vT0xX8RNiHbQUKglbSi1w==
+"@typescript-eslint/types@4.33.0":
+  version "4.33.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-4.33.0.tgz#a1e59036a3b53ae8430ceebf2a919dc7f9af6d72"
+  integrity sha512-zKp7CjQzLQImXEpLt2BUw1tvOMPfNoTAfb8l51evhYbOEEzdWyQNmHWWGPR6hwKJDAi+1VXSBmnhL9kyVTTOuQ==
 
-"@typescript-eslint/typescript-estree@4.31.2":
-  version "4.31.2"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-4.31.2.tgz#abfd50594d8056b37e7428df3b2d185ef2d0060c"
-  integrity sha512-ieBq8U9at6PvaC7/Z6oe8D3czeW5d//Fo1xkF/s9394VR0bg/UaMYPdARiWyKX+lLEjY3w/FNZJxitMsiWv+wA==
+"@typescript-eslint/typescript-estree@4.33.0":
+  version "4.33.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-4.33.0.tgz#0dfb51c2908f68c5c08d82aefeaf166a17c24609"
+  integrity sha512-rkWRY1MPFzjwnEVHsxGemDzqqddw2QbTJlICPD9p9I9LfsO8fdmfQPOX3uKfUaGRDFJbfrtm/sXhVXN4E+bzCA==
   dependencies:
-    "@typescript-eslint/types" "4.31.2"
-    "@typescript-eslint/visitor-keys" "4.31.2"
+    "@typescript-eslint/types" "4.33.0"
+    "@typescript-eslint/visitor-keys" "4.33.0"
     debug "^4.3.1"
     globby "^11.0.3"
     is-glob "^4.0.1"
     semver "^7.3.5"
     tsutils "^3.21.0"
 
-"@typescript-eslint/visitor-keys@4.31.2":
-  version "4.31.2"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-4.31.2.tgz#7d5b4a4705db7fe59ecffb273c1d082760f635cc"
-  integrity sha512-PrBId7EQq2Nibns7dd/ch6S6/M4/iwLM9McbgeEbCXfxdwRUNxJ4UNreJ6Gh3fI2GNKNrWnQxKL7oCPmngKBug==
+"@typescript-eslint/visitor-keys@4.33.0":
+  version "4.33.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-4.33.0.tgz#2a22f77a41604289b7a186586e9ec48ca92ef1dd"
+  integrity sha512-uqi/2aSz9g2ftcHWf8uLPJA70rUv6yuMW5Bohw+bwcuzaxQIHaKFZCKGoGXIrc9vkTJ3+0txM73K0Hq3d5wgIg==
   dependencies:
-    "@typescript-eslint/types" "4.31.2"
+    "@typescript-eslint/types" "4.33.0"
     eslint-visitor-keys "^2.0.0"
 
 abort-controller@^3.0.0:
@@ -1294,7 +1295,7 @@ ignore@^4.0.6:
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-4.0.6.tgz#750e3db5862087b4737ebac8207ffd1ef27b25fc"
   integrity sha512-cyFDKrqc/YdcWFniJhzI42+AzS+gNwmUzOSFcRCQYwySuBBBy/KjuxWLZ/FHEH6Moq1NizMOBWyTcv8O4OZIMg==
 
-ignore@^5.1.4:
+ignore@^5.1.4, ignore@^5.1.8:
   version "5.1.8"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-5.1.8.tgz#f150a8b50a34289b33e22f5889abd4d8016f0e57"
   integrity sha512-BMpfD7PpiETpBl/A6S498BaIJ6Y/ABT93ETbby2fP00v4EbvPBXWEoaR1UBPKs3iR53pJY7EtZk5KACI57i1Uw==