diff --git a/package.json b/package.json
index 18a08fd3..75df9a25 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "@types/node": "^14.14.37",
     "@types/sinon": "^9.0.11",
     "@typescript-eslint/eslint-plugin": "^4.20.0",
-    "@typescript-eslint/parser": "^4.20.0",
+    "@typescript-eslint/parser": "^4.21.0",
     "ava": "^3.15.0",
     "benny": "^3.6.15",
     "c8": "^7.7.0",
diff --git a/yarn.lock b/yarn.lock
index b048bf1c..ebcf6bfd 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1152,14 +1152,14 @@
     eslint-scope "^5.0.0"
     eslint-utils "^2.0.0"
 
-"@typescript-eslint/parser@^4.20.0":
-  version "4.20.0"
-  resolved "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-4.20.0.tgz#8dd403c8b4258b99194972d9799e201b8d083bdd"
-  integrity sha512-m6vDtgL9EABdjMtKVw5rr6DdeMCH3OA1vFb0dAyuZSa3e5yw1YRzlwFnm9knma9Lz6b2GPvoNSa8vOXrqsaglA==
+"@typescript-eslint/parser@^4.21.0":
+  version "4.21.0"
+  resolved "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-4.21.0.tgz#a227fc2af4001668c3e3f7415d4feee5093894c1"
+  integrity sha512-eyNf7QmE5O/l1smaQgN0Lj2M/1jOuNg2NrBm1dqqQN0sVngTLyw8tdCbih96ixlhbF1oINoN8fDCyEH9SjLeIA==
   dependencies:
-    "@typescript-eslint/scope-manager" "4.20.0"
-    "@typescript-eslint/types" "4.20.0"
-    "@typescript-eslint/typescript-estree" "4.20.0"
+    "@typescript-eslint/scope-manager" "4.21.0"
+    "@typescript-eslint/types" "4.21.0"
+    "@typescript-eslint/typescript-estree" "4.21.0"
     debug "^4.1.1"
 
 "@typescript-eslint/scope-manager@4.20.0":
@@ -1170,11 +1170,24 @@
     "@typescript-eslint/types" "4.20.0"
     "@typescript-eslint/visitor-keys" "4.20.0"
 
+"@typescript-eslint/scope-manager@4.21.0":
+  version "4.21.0"
+  resolved "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-4.21.0.tgz#c81b661c4b8af1ec0c010d847a8f9ab76ab95b4d"
+  integrity sha512-kfOjF0w1Ix7+a5T1knOw00f7uAP9Gx44+OEsNQi0PvvTPLYeXJlsCJ4tYnDj5PQEYfpcgOH5yBlw7K+UEI9Agw==
+  dependencies:
+    "@typescript-eslint/types" "4.21.0"
+    "@typescript-eslint/visitor-keys" "4.21.0"
+
 "@typescript-eslint/types@4.20.0":
   version "4.20.0"
   resolved "https://registry.npmjs.org/@typescript-eslint/types/-/types-4.20.0.tgz#c6cf5ef3c9b1c8f699a9bbdafb7a1da1ca781225"
   integrity sha512-cYY+1PIjei1nk49JAPnH1VEnu7OYdWRdJhYI5wiKOUMhLTG1qsx5cQxCUTuwWCmQoyriadz3Ni8HZmGSofeC+w==
 
+"@typescript-eslint/types@4.21.0":
+  version "4.21.0"
+  resolved "https://registry.npmjs.org/@typescript-eslint/types/-/types-4.21.0.tgz#abdc3463bda5d31156984fa5bc316789c960edef"
+  integrity sha512-+OQaupjGVVc8iXbt6M1oZMwyKQNehAfLYJJ3SdvnofK2qcjfor9pEM62rVjBknhowTkh+2HF+/KdRAc/wGBN2w==
+
 "@typescript-eslint/typescript-estree@4.20.0":
   version "4.20.0"
   resolved "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-4.20.0.tgz#8b3b08f85f18a8da5d88f65cb400f013e88ab7be"
@@ -1188,6 +1201,19 @@
     semver "^7.3.2"
     tsutils "^3.17.1"
 
+"@typescript-eslint/typescript-estree@4.21.0":
+  version "4.21.0"
+  resolved "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-4.21.0.tgz#3817bd91857beeaeff90f69f1f112ea58d350b0a"
+  integrity sha512-ZD3M7yLaVGVYLw4nkkoGKumb7Rog7QID9YOWobFDMQKNl+vPxqVIW/uDk+MDeGc+OHcoG2nJ2HphwiPNajKw3w==
+  dependencies:
+    "@typescript-eslint/types" "4.21.0"
+    "@typescript-eslint/visitor-keys" "4.21.0"
+    debug "^4.1.1"
+    globby "^11.0.1"
+    is-glob "^4.0.1"
+    semver "^7.3.2"
+    tsutils "^3.17.1"
+
 "@typescript-eslint/visitor-keys@4.20.0":
   version "4.20.0"
   resolved "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-4.20.0.tgz#1e84db034da13f208325e6bfc995c3b75f7dbd62"
@@ -1196,6 +1222,14 @@
     "@typescript-eslint/types" "4.20.0"
     eslint-visitor-keys "^2.0.0"
 
+"@typescript-eslint/visitor-keys@4.21.0":
+  version "4.21.0"
+  resolved "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-4.21.0.tgz#990a9acdc124331f5863c2cf21c88ba65233cd8d"
+  integrity sha512-dH22dROWGi5Z6p+Igc8bLVLmwy7vEe8r+8c+raPQU0LxgogPUrRAtRGtvBWmlr9waTu3n+QLt/qrS/hWzk1x5w==
+  dependencies:
+    "@typescript-eslint/types" "4.21.0"
+    eslint-visitor-keys "^2.0.0"
+
 JSONStream@^1.0.4:
   version "1.3.5"
   resolved "https://registry.npmjs.org/JSONStream/-/JSONStream-1.3.5.tgz#3208c1f08d3a4d99261ab64f92302bc15e111ca0"