diff --git a/package.json b/package.json
index c2c3e24..0b01890 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "@babel/preset-env": "^7.14.2",
     "@babel/preset-typescript": "^7.13.0",
     "@types/chrome": "^0.0.141",
-    "@types/jest": "^26.0.23",
+    "@types/jest": "^27.0.3",
     "@types/showdown": "^1.9.3",
     "@typescript-eslint/eslint-plugin": "^4.23.0",
     "@typescript-eslint/parser": "^4.24.0",
diff --git a/yarn.lock b/yarn.lock
index 735e8b3..8ebe7f2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1219,6 +1219,17 @@
     "@types/yargs" "^15.0.0"
     chalk "^4.0.0"
 
+"@jest/types@^27.2.5":
+  version "27.2.5"
+  resolved "https://registry.yarnpkg.com/@jest/types/-/types-27.2.5.tgz#420765c052605e75686982d24b061b4cbba22132"
+  integrity sha512-nmuM4VuDtCZcY+eTpw+0nvstwReMsjPoj7ZR80/BbixulhLaiX+fbv8oeLW8WZlJMcsGQsTmMKT/iTZu1Uy/lQ==
+  dependencies:
+    "@types/istanbul-lib-coverage" "^2.0.0"
+    "@types/istanbul-reports" "^3.0.0"
+    "@types/node" "*"
+    "@types/yargs" "^16.0.0"
+    chalk "^4.0.0"
+
 "@nodelib/fs.scandir@2.1.4":
   version "2.1.4"
   resolved "https://registry.yarnpkg.com/@nodelib/fs.scandir/-/fs.scandir-2.1.4.tgz#d4b3549a5db5de2683e0c1071ab4f140904bbf69"
@@ -1359,13 +1370,13 @@
   dependencies:
     "@types/istanbul-lib-report" "*"
 
-"@types/jest@^26.0.23":
-  version "26.0.23"
-  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-26.0.23.tgz#a1b7eab3c503b80451d019efb588ec63522ee4e7"
-  integrity sha512-ZHLmWMJ9jJ9PTiT58juykZpL7KjwJywFN3Rr2pTSkyQfydf/rk22yS7W8p5DaVUMQ2BQC7oYiU3FjbTM/mYrOA==
+"@types/jest@^27.0.3":
+  version "27.0.3"
+  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-27.0.3.tgz#0cf9dfe9009e467f70a342f0f94ead19842a783a"
+  integrity sha512-cmmwv9t7gBYt7hNKH5Spu7Kuu/DotGa+Ff+JGRKZ4db5eh8PnKS4LuebJ3YLUoyOyIHraTGyULn23YtEAm0VSg==
   dependencies:
-    jest-diff "^26.0.0"
-    pretty-format "^26.0.0"
+    jest-diff "^27.0.0"
+    pretty-format "^27.0.0"
 
 "@types/json-schema@*", "@types/json-schema@^7.0.3", "@types/json-schema@^7.0.6":
   version "7.0.7"
@@ -1419,6 +1430,13 @@
   dependencies:
     "@types/yargs-parser" "*"
 
+"@types/yargs@^16.0.0":
+  version "16.0.4"
+  resolved "https://registry.yarnpkg.com/@types/yargs/-/yargs-16.0.4.tgz#26aad98dd2c2a38e421086ea9ad42b9e51642977"
+  integrity sha512-T8Yc9wt/5LbJyCaLiHPReJa0kApcIgJ7Bn735GjItUfh08Z1pJvu8QZqb9s+mMvKV6WUQRV7K2R46YbjMXTTJw==
+  dependencies:
+    "@types/yargs-parser" "*"
+
 "@typescript-eslint/eslint-plugin@^4.23.0":
   version "4.23.0"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-4.23.0.tgz#29d3c9c81f6200b1fd6d8454cfb007ba176cde80"
@@ -1759,6 +1777,11 @@ ansi-regex@^5.0.0:
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-5.0.0.tgz#388539f55179bf39339c81af30a654d69f87cb75"
   integrity sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==
 
+ansi-regex@^5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-5.0.1.tgz#082cb2c89c9fe8659a311a53bd6a4dc5301db304"
+  integrity sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==
+
 ansi-styles@^3.2.0, ansi-styles@^3.2.1:
   version "3.2.1"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-3.2.1.tgz#41fbb20243e50b12be0f04b8dedbf07520ce841d"
@@ -1773,6 +1796,11 @@ ansi-styles@^4.0.0, ansi-styles@^4.1.0:
   dependencies:
     color-convert "^2.0.1"
 
+ansi-styles@^5.0.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-5.2.0.tgz#07449690ad45777d1924ac2abb2fc8895dba836b"
+  integrity sha512-Cxwpt2SfTzTtXcfOlzGEee8O+c+MmUgGrNiBcXnuWxuFJHe6a5Hz7qwhwe5OgaSYI0IJvkLqWX1ASG+cJOkEiA==
+
 anymatch@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/anymatch/-/anymatch-2.0.0.tgz#bcb24b4f37934d9aa7ac17b4adaf89e7c76ef2eb"
@@ -2507,6 +2535,11 @@ diff-sequences@^26.6.2:
   resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-26.6.2.tgz#48ba99157de1923412eed41db6b6d4aa9ca7c0b1"
   integrity sha512-Mv/TDa3nZ9sbc5soK+OoA74BsS3mL37yixCvUAQkiuA4Wz6YtwP/K47n2rv2ovzHZvoiQeA5FTQOschKkEwB0Q==
 
+diff-sequences@^27.0.6:
+  version "27.0.6"
+  resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-27.0.6.tgz#3305cb2e55a033924054695cc66019fd7f8e5723"
+  integrity sha512-ag6wfpBFyNXZ0p8pcuIDS//D8H062ZQJ3fzYxjpmeKjnz8W4pekL3AI8VohmyZmsWW2PWaHgjsmqR6L13101VQ==
+
 dir-glob@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/dir-glob/-/dir-glob-3.0.1.tgz#56dbf73d992a4a93ba1584f4534063fd2e41717f"
@@ -3841,7 +3874,7 @@ jest-config@^26.6.3:
     micromatch "^4.0.2"
     pretty-format "^26.6.2"
 
-jest-diff@^26.0.0, jest-diff@^26.6.2:
+jest-diff@^26.6.2:
   version "26.6.2"
   resolved "https://registry.yarnpkg.com/jest-diff/-/jest-diff-26.6.2.tgz#1aa7468b52c3a68d7d5c5fdcdfcd5e49bd164394"
   integrity sha512-6m+9Z3Gv9wN0WFVasqjCL/06+EFCMTqDEUl/b87HYK2rAPTyfz4ZIuSlPhY51PIQRWx5TaxeF1qmXKe9gfN3sA==
@@ -3851,6 +3884,16 @@ jest-diff@^26.0.0, jest-diff@^26.6.2:
     jest-get-type "^26.3.0"
     pretty-format "^26.6.2"
 
+jest-diff@^27.0.0:
+  version "27.3.1"
+  resolved "https://registry.yarnpkg.com/jest-diff/-/jest-diff-27.3.1.tgz#d2775fea15411f5f5aeda2a5e02c2f36440f6d55"
+  integrity sha512-PCeuAH4AWUo2O5+ksW4pL9v5xJAcIKPUPfIhZBcG1RKv/0+dvaWTQK1Nrau8d67dp65fOqbeMdoil+6PedyEPQ==
+  dependencies:
+    chalk "^4.0.0"
+    diff-sequences "^27.0.6"
+    jest-get-type "^27.3.1"
+    pretty-format "^27.3.1"
+
 jest-docblock@^26.0.0:
   version "26.0.0"
   resolved "https://registry.yarnpkg.com/jest-docblock/-/jest-docblock-26.0.0.tgz#3e2fa20899fc928cb13bd0ff68bd3711a36889b5"
@@ -3899,6 +3942,11 @@ jest-get-type@^26.3.0:
   resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-26.3.0.tgz#e97dc3c3f53c2b406ca7afaed4493b1d099199e0"
   integrity sha512-TpfaviN1R2pQWkIihlfEanwOXK0zcxrKEE4MlU6Tn7keoXdN6/3gK/xl0yEh8DOunn5pOVGKf8hB4R9gVh04ig==
 
+jest-get-type@^27.3.1:
+  version "27.3.1"
+  resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-27.3.1.tgz#a8a2b0a12b50169773099eee60a0e6dd11423eff"
+  integrity sha512-+Ilqi8hgHSAdhlQ3s12CAVNd8H96ZkQBfYoXmArzZnOfAtVAJEiPDBirjByEblvG/4LPJmkL+nBqPO3A1YJAEg==
+
 jest-haste-map@^26.6.2:
   version "26.6.2"
   resolved "https://registry.yarnpkg.com/jest-haste-map/-/jest-haste-map-26.6.2.tgz#dd7e60fe7dc0e9f911a23d79c5ff7fb5c2cafeaa"
@@ -5028,7 +5076,7 @@ prettier@^2.3.0:
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.3.0.tgz#b6a5bf1284026ae640f17f7ff5658a7567fc0d18"
   integrity sha512-kXtO4s0Lz/DW/IJ9QdWhAf7/NmPWQXkFr/r/WkR3vyI+0v8amTDxiaQSLzs8NBlytfLWX/7uQUMIW677yLKl4w==
 
-pretty-format@^26.0.0, pretty-format@^26.6.2:
+pretty-format@^26.6.2:
   version "26.6.2"
   resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-26.6.2.tgz#e35c2705f14cb7fe2fe94fa078345b444120fc93"
   integrity sha512-7AeGuCYNGmycyQbCqd/3PWH4eOoX/OiCa0uphp57NVTeAGdJGaAliecxwBDHYQCIvrW7aDBZCYeNTP/WX69mkg==
@@ -5038,6 +5086,16 @@ pretty-format@^26.0.0, pretty-format@^26.6.2:
     ansi-styles "^4.0.0"
     react-is "^17.0.1"
 
+pretty-format@^27.0.0, pretty-format@^27.3.1:
+  version "27.3.1"
+  resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-27.3.1.tgz#7e9486365ccdd4a502061fa761d3ab9ca1b78df5"
+  integrity sha512-DR/c+pvFc52nLimLROYjnXPtolawm+uWDxr4FjuLDLUn+ktWnSN851KoHwHzzqq6rfCOjkzN8FLgDrSub6UDuA==
+  dependencies:
+    "@jest/types" "^27.2.5"
+    ansi-regex "^5.0.1"
+    ansi-styles "^5.0.0"
+    react-is "^17.0.1"
+
 process-nextick-args@~2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-2.0.1.tgz#7820d9b16120cc55ca9ae7792680ae7dba6d7fe2"