diff --git a/package.json b/package.json
index 6fba090..16f2220 100644
--- a/package.json
+++ b/package.json
@@ -30,8 +30,8 @@
     "@types/jest": "26.0.14",
     "@types/react": "16.9.46",
     "@types/react-dom": "16.9.8",
-    "@typescript-eslint/eslint-plugin": "4.4.1",
-    "@typescript-eslint/parser": "4.4.1",
+    "@typescript-eslint/eslint-plugin": "4.9.0",
+    "@typescript-eslint/parser": "4.9.0",
     "canvas": "2.6.1",
     "codecov": "3.8.0",
     "coveralls": "3.1.0",
diff --git a/yarn.lock b/yarn.lock
index aa4abfc..ebb9c47 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1044,28 +1044,28 @@
   dependencies:
     "@types/yargs-parser" "*"
 
-"@typescript-eslint/eslint-plugin@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-4.4.1.tgz#b8acea0373bd2a388ac47df44652f00bf8b368f5"
-  integrity sha512-O+8Utz8pb4OmcA+Nfi5THQnQpHSD2sDUNw9AxNHpuYOo326HZTtG8gsfT+EAYuVrFNaLyNb2QnUNkmTRDskuRA==
+"@typescript-eslint/eslint-plugin@4.9.0":
+  version "4.9.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-4.9.0.tgz#8fde15743413661fdc086c9f1f5d74a80b856113"
+  integrity sha512-WrVzGMzzCrgrpnQMQm4Tnf+dk+wdl/YbgIgd5hKGa2P+lnJ2MON+nQnbwgbxtN9QDLi8HO+JAq0/krMnjQK6Cw==
   dependencies:
-    "@typescript-eslint/experimental-utils" "4.4.1"
-    "@typescript-eslint/scope-manager" "4.4.1"
+    "@typescript-eslint/experimental-utils" "4.9.0"
+    "@typescript-eslint/scope-manager" "4.9.0"
     debug "^4.1.1"
     functional-red-black-tree "^1.0.1"
     regexpp "^3.0.0"
     semver "^7.3.2"
     tsutils "^3.17.1"
 
-"@typescript-eslint/experimental-utils@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-4.4.1.tgz#40613b9757fa0170de3e0043254dbb077cafac0c"
-  integrity sha512-Nt4EVlb1mqExW9cWhpV6pd1a3DkUbX9DeyYsdoeziKOpIJ04S2KMVDO+SEidsXRH/XHDpbzXykKcMTLdTXH6cQ==
+"@typescript-eslint/experimental-utils@4.9.0":
+  version "4.9.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-4.9.0.tgz#23a296b85d243afba24e75a43fd55aceda5141f0"
+  integrity sha512-0p8GnDWB3R2oGhmRXlEnCvYOtaBCijtA5uBfH5GxQKsukdSQyI4opC4NGTUb88CagsoNQ4rb/hId2JuMbzWKFQ==
   dependencies:
     "@types/json-schema" "^7.0.3"
-    "@typescript-eslint/scope-manager" "4.4.1"
-    "@typescript-eslint/types" "4.4.1"
-    "@typescript-eslint/typescript-estree" "4.4.1"
+    "@typescript-eslint/scope-manager" "4.9.0"
+    "@typescript-eslint/types" "4.9.0"
+    "@typescript-eslint/typescript-estree" "4.9.0"
     eslint-scope "^5.0.0"
     eslint-utils "^2.0.0"
 
@@ -1079,28 +1079,28 @@
     eslint-scope "^5.0.0"
     eslint-utils "^2.0.0"
 
-"@typescript-eslint/parser@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-4.4.1.tgz#25fde9c080611f303f2f33cedb145d2c59915b80"
-  integrity sha512-S0fuX5lDku28Au9REYUsV+hdJpW/rNW0gWlc4SXzF/kdrRaAVX9YCxKpziH7djeWT/HFAjLZcnY7NJD8xTeUEg==
+"@typescript-eslint/parser@4.9.0":
+  version "4.9.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-4.9.0.tgz#bb65f1214b5e221604996db53ef77c9d62b09249"
+  integrity sha512-QRSDAV8tGZoQye/ogp28ypb8qpsZPV6FOLD+tbN4ohKUWHD2n/u0Q2tIBnCsGwQCiD94RdtLkcqpdK4vKcLCCw==
   dependencies:
-    "@typescript-eslint/scope-manager" "4.4.1"
-    "@typescript-eslint/types" "4.4.1"
-    "@typescript-eslint/typescript-estree" "4.4.1"
+    "@typescript-eslint/scope-manager" "4.9.0"
+    "@typescript-eslint/types" "4.9.0"
+    "@typescript-eslint/typescript-estree" "4.9.0"
     debug "^4.1.1"
 
-"@typescript-eslint/scope-manager@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-4.4.1.tgz#d19447e60db2ce9c425898d62fa03b2cce8ea3f9"
-  integrity sha512-2oD/ZqD4Gj41UdFeWZxegH3cVEEH/Z6Bhr/XvwTtGv66737XkR4C9IqEkebCuqArqBJQSj4AgNHHiN1okzD/wQ==
+"@typescript-eslint/scope-manager@4.9.0":
+  version "4.9.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-4.9.0.tgz#5eefe305d6b71d1c85af6587b048426bfd4d3708"
+  integrity sha512-q/81jtmcDtMRE+nfFt5pWqO0R41k46gpVLnuefqVOXl4QV1GdQoBWfk5REcipoJNQH9+F5l+dwa9Li5fbALjzg==
   dependencies:
-    "@typescript-eslint/types" "4.4.1"
-    "@typescript-eslint/visitor-keys" "4.4.1"
+    "@typescript-eslint/types" "4.9.0"
+    "@typescript-eslint/visitor-keys" "4.9.0"
 
-"@typescript-eslint/types@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-4.4.1.tgz#c507b35cf523bc7ba00aae5f75ee9b810cdabbc1"
-  integrity sha512-KNDfH2bCyax5db+KKIZT4rfA8rEk5N0EJ8P0T5AJjo5xrV26UAzaiqoJCxeaibqc0c/IvZxp7v2g3difn2Pn3w==
+"@typescript-eslint/types@4.9.0":
+  version "4.9.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-4.9.0.tgz#3fe8c3632abd07095c7458f7451bd14c85d0033c"
+  integrity sha512-luzLKmowfiM/IoJL/rus1K9iZpSJK6GlOS/1ezKplb7MkORt2dDcfi8g9B0bsF6JoRGhqn0D3Va55b+vredFHA==
 
 "@typescript-eslint/typescript-estree@2.34.0":
   version "2.34.0"
@@ -1115,13 +1115,13 @@
     semver "^7.3.2"
     tsutils "^3.17.1"
 
-"@typescript-eslint/typescript-estree@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-4.4.1.tgz#598f6de488106c2587d47ca2462c60f6e2797cb8"
-  integrity sha512-wP/V7ScKzgSdtcY1a0pZYBoCxrCstLrgRQ2O9MmCUZDtmgxCO/TCqOTGRVwpP4/2hVfqMz/Vw1ZYrG8cVxvN3g==
+"@typescript-eslint/typescript-estree@4.9.0":
+  version "4.9.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-4.9.0.tgz#38a98df6ee281cfd6164d6f9d91795b37d9e508c"
+  integrity sha512-rmDR++PGrIyQzAtt3pPcmKWLr7MA+u/Cmq9b/rON3//t5WofNR4m/Ybft2vOLj0WtUzjn018ekHjTsnIyBsQug==
   dependencies:
-    "@typescript-eslint/types" "4.4.1"
-    "@typescript-eslint/visitor-keys" "4.4.1"
+    "@typescript-eslint/types" "4.9.0"
+    "@typescript-eslint/visitor-keys" "4.9.0"
     debug "^4.1.1"
     globby "^11.0.1"
     is-glob "^4.0.1"
@@ -1129,12 +1129,12 @@
     semver "^7.3.2"
     tsutils "^3.17.1"
 
-"@typescript-eslint/visitor-keys@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-4.4.1.tgz#1769dc7a9e2d7d2cfd3318b77ed8249187aed5c3"
-  integrity sha512-H2JMWhLaJNeaylSnMSQFEhT/S/FsJbebQALmoJxMPMxLtlVAMy2uJP/Z543n9IizhjRayLSqoInehCeNW9rWcw==
+"@typescript-eslint/visitor-keys@4.9.0":
+  version "4.9.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-4.9.0.tgz#f284e9fac43f2d6d35094ce137473ee321f266c8"
+  integrity sha512-sV45zfdRqQo1A97pOSx3fsjR+3blmwtdCt8LDrXgCX36v4Vmz4KHrhpV6Fo2cRdXmyumxx11AHw0pNJqCNpDyg==
   dependencies:
-    "@typescript-eslint/types" "4.4.1"
+    "@typescript-eslint/types" "4.9.0"
     eslint-visitor-keys "^2.0.0"
 
 JSONStream@^1.0.4, JSONStream@^1.3.4, JSONStream@^1.3.5: