diff --git a/package-lock.json b/package-lock.json
index 6a176067..c87396d1 100644
--- a/package-lock.json
+++ b/package-lock.json
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+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.0.2.tgz",
+      "integrity": "sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ==",
       "dev": true
     },
     "unique-string": {
@@ -3552,9 +3416,9 @@
       "dev": true
     },
     "update-notifier": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/update-notifier/-/update-notifier-4.1.0.tgz",
-      "integrity": "sha512-w3doE1qtI0/ZmgeoDoARmI5fjDoT93IfKgEGqm26dGUOh8oNpaSTsGNdYRN/SjOuo10jcJGwkEL3mroKzktkew==",
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/update-notifier/-/update-notifier-4.1.1.tgz",
+      "integrity": "sha512-9y+Kds0+LoLG6yN802wVXoIfxYEwh3FlZwzMwpCZp62S2i1/Jzeqb9Eeeju3NSHccGGasfGlK5/vEHbAifYRDg==",
       "requires": {
         "boxen": "^4.2.0",
         "chalk": "^3.0.0",
@@ -3616,9 +3480,9 @@
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     },
     "v8-to-istanbul": {
-      "version": "4.1.4",
-      "resolved": "https://registry.npmjs.org/v8-to-istanbul/-/v8-to-istanbul-4.1.4.tgz",
-      "integrity": "sha512-Rw6vJHj1mbdK8edjR7+zuJrpDtKIgNdAvTSAcpYfgMIw+u2dPDntD3dgN4XQFLU2/fvFQdzj+EeSGfd/jnY5fQ==",
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/v8-to-istanbul/-/v8-to-istanbul-5.0.1.tgz",
+      "integrity": "sha512-mbDNjuDajqYe3TXFk5qxcQy8L1msXNE37WTlLoqqpBfRsimbNcrlhQlDPntmECEcUvdC+AQ8CyMMf6EUx1r74Q==",
       "dev": true,
       "requires": {
         "@types/istanbul-lib-coverage": "^2.0.1",
@@ -3645,9 +3509,10 @@
       }
     },
     "which": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
-      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+      "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+      "dev": true,
       "requires": {
         "isexe": "^2.0.0"
       }
@@ -3673,12 +3538,6 @@
           "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
           "dev": true
         },
-        "is-fullwidth-code-point": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
-          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
-          "dev": true
-        },
         "string-width": {
           "version": "2.1.1",
           "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
@@ -3706,6 +3565,28 @@
       "integrity": "sha512-NsmoXalsWVDMGupxZ5R08ka9flZjjiLvHVAWYOKtiKM8ujtZWr9cRffak+uSE48+Ob8ObalXpwyeUiyDD6QFgg==",
       "requires": {
         "string-width": "^4.0.0"
+      },
+      "dependencies": {
+        "emoji-regex": {
+          "version": "8.0.0",
+          "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
+          "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A=="
+        },
+        "is-fullwidth-code-point": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
+          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg=="
+        },
+        "string-width": {
+          "version": "4.2.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.0.tgz",
+          "integrity": "sha512-zUz5JD+tgqtuDjMhwIg5uFVV3dtqZ9yQJlZVfq4I01/K5Paj5UHj7VyrQOJvzawSVlKpObApbfD0Ed6yJc+1eg==",
+          "requires": {
+            "emoji-regex": "^8.0.0",
+            "is-fullwidth-code-point": "^3.0.0",
+            "strip-ansi": "^6.0.0"
+          }
+        }
       }
     },
     "word-wrap": {
@@ -3730,13 +3611,27 @@
         "strip-ansi": "^6.0.0"
       },
       "dependencies": {
-        "strip-ansi": {
-          "version": "6.0.0",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.0.tgz",
-          "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
+        "emoji-regex": {
+          "version": "8.0.0",
+          "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
+          "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
+          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
+          "dev": true
+        },
+        "string-width": {
+          "version": "4.2.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.0.tgz",
+          "integrity": "sha512-zUz5JD+tgqtuDjMhwIg5uFVV3dtqZ9yQJlZVfq4I01/K5Paj5UHj7VyrQOJvzawSVlKpObApbfD0Ed6yJc+1eg==",
           "dev": true,
           "requires": {
-            "ansi-regex": "^5.0.0"
+            "emoji-regex": "^8.0.0",
+            "is-fullwidth-code-point": "^3.0.0",
+            "strip-ansi": "^6.0.0"
           }
         }
       }
@@ -3799,6 +3694,31 @@
         "which-module": "^2.0.0",
         "y18n": "^4.0.0",
         "yargs-parser": "^18.1.2"
+      },
+      "dependencies": {
+        "emoji-regex": {
+          "version": "8.0.0",
+          "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
+          "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
+          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
+          "dev": true
+        },
+        "string-width": {
+          "version": "4.2.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.0.tgz",
+          "integrity": "sha512-zUz5JD+tgqtuDjMhwIg5uFVV3dtqZ9yQJlZVfq4I01/K5Paj5UHj7VyrQOJvzawSVlKpObApbfD0Ed6yJc+1eg==",
+          "dev": true,
+          "requires": {
+            "emoji-regex": "^8.0.0",
+            "is-fullwidth-code-point": "^3.0.0",
+            "strip-ansi": "^6.0.0"
+          }
+        }
       }
     },
     "yargs-parser": {
@@ -3808,26 +3728,27 @@
       "requires": {
         "camelcase": "^5.0.0",
         "decamelize": "^1.2.0"
-      },
-      "dependencies": {
-        "camelcase": {
-          "version": "5.3.1",
-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
-          "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg=="
-        }
       }
     },
     "yargs-unparser": {
-      "version": "1.6.0",
-      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.6.0.tgz",
-      "integrity": "sha512-W9tKgmSn0DpSatfri0nx52Joq5hVXgeLiqR/5G0sZNDoLZFOr/xjBUDcShCOGNsBnEMNo1KAMBkTej1Hm62HTw==",
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.6.1.tgz",
+      "integrity": "sha512-qZV14lK9MWsGCmcr7u5oXGH0dbGqZAIxTDrWXZDo5zUr6b6iUmelNKO6x6R1dQT24AH3LgRxJpr8meWy2unolA==",
       "dev": true,
       "requires": {
+        "camelcase": "^5.3.1",
+        "decamelize": "^1.2.0",
         "flat": "^4.1.0",
-        "lodash": "^4.17.15",
-        "yargs": "^13.3.0"
+        "is-plain-obj": "^1.1.0",
+        "yargs": "^14.2.3"
       },
       "dependencies": {
+        "ansi-regex": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+          "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
+          "dev": true
+        },
         "ansi-styles": {
           "version": "3.2.1",
           "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
@@ -3837,12 +3758,6 @@
             "color-convert": "^1.9.0"
           }
         },
-        "camelcase": {
-          "version": "5.3.1",
-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
-          "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
-          "dev": true
-        },
         "cliui": {
           "version": "5.0.0",
           "resolved": "https://registry.npmjs.org/cliui/-/cliui-5.0.0.tgz",
@@ -3869,12 +3784,6 @@
           "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
           "dev": true
         },
-        "emoji-regex": {
-          "version": "7.0.3",
-          "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-7.0.3.tgz",
-          "integrity": "sha512-CwBLREIQ7LvYFB0WyRvwhq5N5qPhc6PMjD6bYggFlI5YyDgl+0vxq5VHbMOFqLg7hfWzmu8T5Z1QofhmTIhItA==",
-          "dev": true
-        },
         "find-up": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/find-up/-/find-up-3.0.0.tgz",
@@ -3884,12 +3793,6 @@
             "locate-path": "^3.0.0"
           }
         },
-        "is-fullwidth-code-point": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
-          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
-          "dev": true
-        },
         "locate-path": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",
@@ -3915,15 +3818,13 @@
           "integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU=",
           "dev": true
         },
-        "string-width": {
-          "version": "3.1.0",
-          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
-          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
+        "strip-ansi": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
+          "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
           "dev": true,
           "requires": {
-            "emoji-regex": "^7.0.1",
-            "is-fullwidth-code-point": "^2.0.0",
-            "strip-ansi": "^5.1.0"
+            "ansi-regex": "^4.1.0"
           }
         },
         "wrap-ansi": {
@@ -3938,12 +3839,13 @@
           }
         },
         "yargs": {
-          "version": "13.3.2",
-          "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.3.2.tgz",
-          "integrity": "sha512-AX3Zw5iPruN5ie6xGRIDgqkT+ZhnRlZMLMHAs8tg7nRruy2Nb+i5o9bwghAogtM08q1dpr2LVoS8KSTMYpWXUw==",
+          "version": "14.2.3",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-14.2.3.tgz",
+          "integrity": "sha512-ZbotRWhF+lkjijC/VhmOT9wSgyBQ7+zr13+YLkhfsSiTriYsMzkTUFP18pFhWwBeMa5gUc1MzbhrO6/VB7c9Xg==",
           "dev": true,
           "requires": {
             "cliui": "^5.0.0",
+            "decamelize": "^1.2.0",
             "find-up": "^3.0.0",
             "get-caller-file": "^2.0.1",
             "require-directory": "^2.1.1",
@@ -3952,13 +3854,13 @@
             "string-width": "^3.0.0",
             "which-module": "^2.0.0",
             "y18n": "^4.0.0",
-            "yargs-parser": "^13.1.2"
+            "yargs-parser": "^15.0.1"
           }
         },
         "yargs-parser": {
-          "version": "13.1.2",
-          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.2.tgz",
-          "integrity": "sha512-3lbsNRf/j+A4QuSZfDRA7HRSfWrzO0YjqTJd5kjAq37Zep1CEgaYmrH9Q3GwPiB9cHyd1Y1UwggGhJGoxipbzg==",
+          "version": "15.0.1",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-15.0.1.tgz",
+          "integrity": "sha512-0OAMV2mAZQrs3FkNpDQcBk1x5HXb8X4twADss4S0Iuk+2dGnLOE/fRHrsYm542GduMveyA77OF4wrNJuanRCWw==",
           "dev": true,
           "requires": {
             "camelcase": "^5.0.0",
diff --git a/package.json b/package.json
index ccb32d41..37a29ea9 100644
--- a/package.json
+++ b/package.json
@@ -34,55 +34,60 @@
   "engines": {
     "node": ">=10"
   },
-  "keywords": [],
+  "keywords": [
+    "typescript",
+    "linter",
+    "formatter",
+    "google"
+  ],
   "author": "Google Inc.",
   "license": "Apache-2.0",
   "dependencies": {
-    "@typescript-eslint/eslint-plugin": "^3.2.0",
-    "@typescript-eslint/parser": "^3.2.0",
-    "chalk": "^4.0.0",
-    "eslint": "^6.8.0",
-    "eslint-config-prettier": "^6.10.1",
+    "@typescript-eslint/eslint-plugin": "^3.9.1",
+    "@typescript-eslint/parser": "^3.9.1",
+    "chalk": "^4.1.0",
+    "eslint": "^7.7.0",
+    "eslint-config-prettier": "^6.11.0",
     "eslint-plugin-node": "^11.1.0",
-    "eslint-plugin-prettier": "^3.1.2",
-    "execa": "^4.0.0",
-    "inquirer": "^7.1.0",
-    "meow": "^7.0.0",
+    "eslint-plugin-prettier": "^3.1.4",
+    "execa": "^4.0.3",
+    "inquirer": "^7.3.3",
+    "meow": "^7.1.0",
     "ncp": "^2.0.0",
-    "prettier": "^2.0.4",
+    "prettier": "^2.0.5",
     "rimraf": "^3.0.2",
-    "update-notifier": "^4.1.0",
+    "update-notifier": "^4.1.1",
     "write-file-atomic": "^3.0.3"
   },
   "devDependencies": {
     "@npm/types": "^1.0.1",
-    "@types/chai": "^4.2.11",
-    "@types/cross-spawn": "^6.0.1",
-    "@types/eslint": "^6.8.0",
-    "@types/fs-extra": "^9.0.0",
-    "@types/inquirer": "^7.0.0",
-    "@types/mocha": "^8.0.0",
-    "@types/ncp": "^2.0.3",
-    "@types/node": "^13.11.1",
-    "@types/prettier": "^2.0.0",
+    "@types/chai": "^4.2.12",
+    "@types/cross-spawn": "^6.0.2",
+    "@types/eslint": "^7.2.0",
+    "@types/fs-extra": "^9.0.1",
+    "@types/inquirer": "^7.3.1",
+    "@types/mocha": "^8.0.3",
+    "@types/ncp": "^2.0.4",
+    "@types/node": "^14.6.0",
+    "@types/prettier": "^2.0.2",
     "@types/rimraf": "^3.0.0",
-    "@types/sinon": "^9.0.0",
+    "@types/sinon": "^9.0.4",
     "@types/tmp": "^0.2.0",
-    "@types/update-notifier": "^4.1.0",
-    "@types/write-file-atomic": "^3.0.0",
-    "c8": "^7.1.0",
+    "@types/update-notifier": "^4.1.1",
+    "@types/write-file-atomic": "^3.0.1",
+    "c8": "^7.3.0",
     "chai": "^4.2.0",
-    "codecov": "^3.6.5",
-    "cross-spawn": "^7.0.2",
-    "fs-extra": "^9.0.0",
+    "codecov": "^3.7.2",
+    "cross-spawn": "^7.0.3",
+    "fs-extra": "^9.0.1",
     "inline-fixtures": "^1.1.0",
-    "js-green-licenses": "^2.0.0",
-    "mocha": "^8.0.0",
-    "sinon": "^9.0.2",
+    "js-green-licenses": "^2.0.1",
+    "mocha": "^8.1.1",
+    "sinon": "^9.0.3",
     "tmp": "0.2.1",
-    "typescript": "^3.8.3"
+    "typescript": "^4.0.2"
   },
   "peerDependencies": {
-    "typescript": "^3.0.0"
+    "typescript": ">=3 <=4"
   }
 }
diff --git a/test/kitchen.ts b/test/kitchen.ts
index c0d6dbe2..bb38252e 100644
--- a/test/kitchen.ts
+++ b/test/kitchen.ts
@@ -13,7 +13,10 @@ const pkg = require('../../package.json');
 const keep = !!process.env.GTS_KEEP_TEMPDIRS;
 const stagingDir = tmp.dirSync({keep, unsafeCleanup: true});
 const stagingPath = stagingDir.name;
-const execOpts = {
+const execOpts: Pick<
+  cp.SpawnSyncOptionsWithStringEncoding,
+  'cwd' | 'encoding'
+> = {
   cwd: `${stagingPath}${path.sep}kitchen`,
   encoding: 'utf8',
 };