diff --git a/package.json b/package.json
index 87fada2a..b5b917be 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "@types/node": "^14.14.10",
     "@types/sinon": "^9.0.9",
     "@typescript-eslint/eslint-plugin": "^4.9.1",
-    "@typescript-eslint/parser": "^4.8.2",
+    "@typescript-eslint/parser": "^4.9.1",
     "ava": "^3.14.0",
     "benny": "^3.6.15",
     "cross-env": "^7.0.3",
diff --git a/yarn.lock b/yarn.lock
index 183a1c99..0cdf47ae 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1438,24 +1438,16 @@
     eslint-scope "^5.0.0"
     eslint-utils "^2.0.0"
 
-"@typescript-eslint/parser@^4.8.2":
-  version "4.8.2"
-  resolved "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-4.8.2.tgz#78dccbe5124de2b8dea2d4c363dee9f769151ca8"
-  integrity sha512-u0leyJqmclYr3KcXOqd2fmx6SDGBO0MUNHHAjr0JS4Crbb3C3d8dwAdlazy133PLCcPn+aOUFiHn72wcuc5wYw==
+"@typescript-eslint/parser@^4.9.1":
+  version "4.9.1"
+  resolved "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-4.9.1.tgz#2d74c4db5dd5117379a9659081a4d1ec02629055"
+  integrity sha512-Gv2VpqiomvQ2v4UL+dXlQcZ8zCX4eTkoIW+1aGVWT6yTO+6jbxsw7yQl2z2pPl/4B9qa5JXeIbhJpONKjXIy3g==
   dependencies:
-    "@typescript-eslint/scope-manager" "4.8.2"
-    "@typescript-eslint/types" "4.8.2"
-    "@typescript-eslint/typescript-estree" "4.8.2"
+    "@typescript-eslint/scope-manager" "4.9.1"
+    "@typescript-eslint/types" "4.9.1"
+    "@typescript-eslint/typescript-estree" "4.9.1"
     debug "^4.1.1"
 
-"@typescript-eslint/scope-manager@4.8.2":
-  version "4.8.2"
-  resolved "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-4.8.2.tgz#a18388c63ae9c17adde519384f539392f2c4f0d9"
-  integrity sha512-qHQ8ODi7mMin4Sq2eh/6eu03uVzsf5TX+J43xRmiq8ujng7ViQSHNPLOHGw/Wr5dFEoxq/ubKhzClIIdQy5q3g==
-  dependencies:
-    "@typescript-eslint/types" "4.8.2"
-    "@typescript-eslint/visitor-keys" "4.8.2"
-
 "@typescript-eslint/scope-manager@4.9.1":
   version "4.9.1"
   resolved "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-4.9.1.tgz#cc2fde310b3f3deafe8436a924e784eaab265103"
@@ -1464,30 +1456,11 @@
     "@typescript-eslint/types" "4.9.1"
     "@typescript-eslint/visitor-keys" "4.9.1"
 
-"@typescript-eslint/types@4.8.2":
-  version "4.8.2"
-  resolved "https://registry.npmjs.org/@typescript-eslint/types/-/types-4.8.2.tgz#c862dd0e569d9478eb82d6aee662ea53f5661a36"
-  integrity sha512-z1/AVcVF8ju5ObaHe2fOpZYEQrwHyZ7PTOlmjd3EoFeX9sv7UekQhfrCmgUO7PruLNfSHrJGQvrW3Q7xQ8EoAw==
-
 "@typescript-eslint/types@4.9.1":
   version "4.9.1"
   resolved "https://registry.npmjs.org/@typescript-eslint/types/-/types-4.9.1.tgz#a1a7dd80e4e5ac2c593bc458d75dd1edaf77faa2"
   integrity sha512-fjkT+tXR13ks6Le7JiEdagnwEFc49IkOyys7ueWQ4O8k4quKPwPJudrwlVOJCUQhXo45PrfIvIarcrEjFTNwUA==
 
-"@typescript-eslint/typescript-estree@4.8.2":
-  version "4.8.2"
-  resolved "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-4.8.2.tgz#eeec34707d8577600fb21661b5287226cc8b3bed"
-  integrity sha512-HToGNwI6fekH0dOw3XEVESUm71Onfam0AKin6f26S2FtUmO7o3cLlWgrIaT1q3vjB3wCTdww3Dx2iGq5wtUOCg==
-  dependencies:
-    "@typescript-eslint/types" "4.8.2"
-    "@typescript-eslint/visitor-keys" "4.8.2"
-    debug "^4.1.1"
-    globby "^11.0.1"
-    is-glob "^4.0.1"
-    lodash "^4.17.15"
-    semver "^7.3.2"
-    tsutils "^3.17.1"
-
 "@typescript-eslint/typescript-estree@4.9.1":
   version "4.9.1"
   resolved "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-4.9.1.tgz#6e5b86ff5a5f66809e1f347469fadeec69ac50bf"
@@ -1502,14 +1475,6 @@
     semver "^7.3.2"
     tsutils "^3.17.1"
 
-"@typescript-eslint/visitor-keys@4.8.2":
-  version "4.8.2"
-  resolved "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-4.8.2.tgz#62cd3fbbbf65f8eccfbe6f159eb1b84a243a3f77"
-  integrity sha512-Vg+/SJTMZJEKKGHW7YC21QxgKJrSbxoYYd3MEUGtW7zuytHuEcksewq0DUmo4eh/CTNrVJGSdIY9AtRb6riWFw==
-  dependencies:
-    "@typescript-eslint/types" "4.8.2"
-    eslint-visitor-keys "^2.0.0"
-
 "@typescript-eslint/visitor-keys@4.9.1":
   version "4.9.1"
   resolved "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-4.9.1.tgz#d76374a58c4ead9e92b454d186fea63487b25ae1"