diff --git a/.textlintrc.js b/.textlintrc.js
index 2b6ce22..e6b8545 100644
--- a/.textlintrc.js
+++ b/.textlintrc.js
@@ -7,6 +7,17 @@ module.exports = {
     'max-comma': {
       max : 4,
     },
+    'no-dead-link': {
+      checkRelative: true,
+      baseURI: null,
+      ignore: ['http://localhost*'],
+      preferGET: [],
+      ignoreRedirects: false,
+      retry: 3,
+      userAgent: 'textlint-rule-no-dead-link/1.0',
+      maxRetryTime: 10,
+      maxRetryAfterTime: 90
+    }
   },
   filters: {
     comments: true,
diff --git a/README.md b/README.md
index 1146374..ee87d56 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # IT4C.dev
 
-This repository contains the https://IT4C.dev Website utilizing `vuepress` to generate it.
+This repository contains the https://www.it4c.dev Website utilizing `vuepress` to generate it.
 
 ## Software requirements
 
@@ -32,4 +32,12 @@ Bring up a development environment with hot reloading which can be reached under
 
 ```
 npm run dev
+```
+
+### Test
+
+Run the tests to ensure things are all working as expected
+
+```
+npm test
 ```
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index efee873..c93355c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,6 +12,7 @@
         "textlint": "^12.4.0",
         "textlint-filter-rule-comments": "^1.2.2",
         "textlint-rule-max-comma": "^2.0.2",
+        "textlint-rule-no-dead-link": "^5.1.2",
         "textlint-rule-no-start-duplicated-conjunction": "^2.0.2",
         "textlint-rule-no-todo": "^2.0.1",
         "vuepress": "^1.9.7",
@@ -7618,6 +7619,12 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/get-url-origin": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/get-url-origin/-/get-url-origin-1.0.1.tgz",
+      "integrity": "sha512-MMSKo16gB2+6CjWy55jNdIAqUEaKgw3LzZCb8wVVtFrhoQ78EXyuYXxDdn3COI3A4Xr4ZfM3fZa9RTjO6DOTxw==",
+      "dev": true
+    },
     "node_modules/get-value": {
       "version": "2.0.6",
       "resolved": "https://registry.npmjs.org/get-value/-/get-value-2.0.6.tgz",
@@ -9643,6 +9650,18 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/map-age-cleaner": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/map-age-cleaner/-/map-age-cleaner-0.1.3.tgz",
+      "integrity": "sha512-bJzx6nMoP6PDLPBFmg7+xRKeFZvFboMrGlxmNj9ClvX53KrmvM5bXFXEWjbz4cz1AFn+jWJ9z/DJSz7hrs0w3w==",
+      "dev": true,
+      "dependencies": {
+        "p-defer": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/map-cache": {
       "version": "0.2.2",
       "resolved": "https://registry.npmjs.org/map-cache/-/map-cache-0.2.2.tgz",
@@ -9968,6 +9987,20 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/mem": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/mem/-/mem-4.3.0.tgz",
+      "integrity": "sha512-qX2bG48pTqYRVmDB37rn/6PT7LcR8T7oAX3bf99u1Tt1nzxYfxkgqDwUwolPlXweM0XzBOBFzSx4kfp7KP1s/w==",
+      "dev": true,
+      "dependencies": {
+        "map-age-cleaner": "^0.1.1",
+        "mimic-fn": "^2.0.0",
+        "p-is-promise": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/memory-fs": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/memory-fs/-/memory-fs-0.4.1.tgz",
@@ -10238,6 +10271,15 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/mimic-fn": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-2.1.0.tgz",
+      "integrity": "sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/mimic-response": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-1.0.1.tgz",
@@ -10514,6 +10556,26 @@
         "lower-case": "^1.1.1"
       }
     },
+    "node_modules/node-fetch": {
+      "version": "2.6.7",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.7.tgz",
+      "integrity": "sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==",
+      "dev": true,
+      "dependencies": {
+        "whatwg-url": "^5.0.0"
+      },
+      "engines": {
+        "node": "4.x || >=6.0.0"
+      },
+      "peerDependencies": {
+        "encoding": "^0.1.0"
+      },
+      "peerDependenciesMeta": {
+        "encoding": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/node-forge": {
       "version": "0.10.0",
       "resolved": "https://registry.npmjs.org/node-forge/-/node-forge-0.10.0.tgz",
@@ -10998,6 +11060,15 @@
         "node": ">=6"
       }
     },
+    "node_modules/p-defer": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/p-defer/-/p-defer-1.0.0.tgz",
+      "integrity": "sha512-wB3wfAxZpk2AzOfUMJNL+d36xothRSyj8EXOa4f6GMqYDN9BJaaSISbsk+wS9abmnebVw95C2Kb5t85UmpCxuw==",
+      "dev": true,
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/p-finally": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/p-finally/-/p-finally-1.0.0.tgz",
@@ -11007,6 +11078,15 @@
         "node": ">=4"
       }
     },
+    "node_modules/p-is-promise": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/p-is-promise/-/p-is-promise-2.1.0.tgz",
+      "integrity": "sha512-Y3W0wlRPK8ZMRbNq97l4M5otioeA5lm1z7bkNkxCka8HSPjR0xRWmpCmc9utiaLP9Jb1eD8BgeIxTW4AIF45Pg==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/p-limit": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.3.0.tgz",
@@ -11043,6 +11123,35 @@
         "node": ">=6"
       }
     },
+    "node_modules/p-memoize": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/p-memoize/-/p-memoize-3.1.0.tgz",
+      "integrity": "sha512-e5tIvrsr7ydUUnxb534iQWtXxWgk/86IsH+H+nV4FHouIggBt4coXboKBt26o4lTu7JbEnGSeXdEsYR8BhAHFA==",
+      "dev": true,
+      "dependencies": {
+        "mem": "^4.3.0",
+        "mimic-fn": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/p-queue": {
+      "version": "6.6.2",
+      "resolved": "https://registry.npmjs.org/p-queue/-/p-queue-6.6.2.tgz",
+      "integrity": "sha512-RwFpb72c/BhQLEXIZ5K2e+AhgNVmIejGlTgiB9MzZ0e93GRvqZ7uSi0dvRF7/XIXDeNkra2fNHBxTyPDGySpjQ==",
+      "dev": true,
+      "dependencies": {
+        "eventemitter3": "^4.0.4",
+        "p-timeout": "^3.2.0"
+      },
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/p-retry": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/p-retry/-/p-retry-3.0.1.tgz",
@@ -11055,6 +11164,18 @@
         "node": ">=6"
       }
     },
+    "node_modules/p-timeout": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/p-timeout/-/p-timeout-3.2.0.tgz",
+      "integrity": "sha512-rhIwUycgwwKcP9yTOOFK/AKsAopjjCakVqLHePO3CC6Mir1Z99xT+R63jZxAT5lFZLa2inS5h+ZS2GvR99/FBg==",
+      "dev": true,
+      "dependencies": {
+        "p-finally": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/p-try": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
@@ -14862,6 +14983,46 @@
         "unist-util-filter": "^2.0.3"
       }
     },
+    "node_modules/textlint-rule-no-dead-link": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/textlint-rule-no-dead-link/-/textlint-rule-no-dead-link-5.1.2.tgz",
+      "integrity": "sha512-TXJKXL5WU6dtSbRuNli91D0emY8hQTBP1VUSbq2Ka+zDMoE/vqkzsAyVl7V7YuiwW8URXfc98BzYHu4NDAdQLw==",
+      "dev": true,
+      "dependencies": {
+        "fs-extra": "^8.1.0",
+        "get-url-origin": "^1.0.1",
+        "minimatch": "^3.0.4",
+        "node-fetch": "^2.6.0",
+        "p-memoize": "^3.1.0",
+        "p-queue": "^6.2.0",
+        "textlint-rule-helper": "^2.2.2"
+      },
+      "engines": {
+        "node": ">=4"
+      },
+      "peerDependencies": {
+        "textlint": ">= 12.2.0"
+      },
+      "peerDependenciesMeta": {
+        "textlint": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/textlint-rule-no-dead-link/node_modules/fs-extra": {
+      "version": "8.1.0",
+      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-8.1.0.tgz",
+      "integrity": "sha512-yhlQgA6mnOJUKOsRUFsgJdQCvkKhcz8tlZG5HBQfReYZy46OwLcY+Zia0mtdHsOo9y/hP+CxMN0TU9QxoOtG4g==",
+      "dev": true,
+      "dependencies": {
+        "graceful-fs": "^4.2.0",
+        "jsonfile": "^4.0.0",
+        "universalify": "^0.1.0"
+      },
+      "engines": {
+        "node": ">=6 <7 || >=8"
+      }
+    },
     "node_modules/textlint-rule-no-start-duplicated-conjunction": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/textlint-rule-no-start-duplicated-conjunction/-/textlint-rule-no-start-duplicated-conjunction-2.0.2.tgz",
@@ -15108,6 +15269,12 @@
         "node": ">=0.8"
       }
     },
+    "node_modules/tr46": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
+      "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==",
+      "dev": true
+    },
     "node_modules/traverse": {
       "version": "0.6.7",
       "resolved": "https://registry.npmjs.org/traverse/-/traverse-0.6.7.tgz",
@@ -16429,6 +16596,12 @@
         "url": "https://github.com/sponsors/wooorm"
       }
     },
+    "node_modules/webidl-conversions": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
+      "integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==",
+      "dev": true
+    },
     "node_modules/webpack": {
       "version": "4.46.0",
       "resolved": "https://registry.npmjs.org/webpack/-/webpack-4.46.0.tgz",
@@ -16727,6 +16900,16 @@
         "node": ">=0.8.0"
       }
     },
+    "node_modules/whatwg-url": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
+      "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==",
+      "dev": true,
+      "dependencies": {
+        "tr46": "~0.0.3",
+        "webidl-conversions": "^3.0.0"
+      }
+    },
     "node_modules/when": {
       "version": "3.6.4",
       "resolved": "https://registry.npmjs.org/when/-/when-3.6.4.tgz",
@@ -23082,6 +23265,12 @@
         "get-intrinsic": "^1.1.1"
       }
     },
+    "get-url-origin": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/get-url-origin/-/get-url-origin-1.0.1.tgz",
+      "integrity": "sha512-MMSKo16gB2+6CjWy55jNdIAqUEaKgw3LzZCb8wVVtFrhoQ78EXyuYXxDdn3COI3A4Xr4ZfM3fZa9RTjO6DOTxw==",
+      "dev": true
+    },
     "get-value": {
       "version": "2.0.6",
       "resolved": "https://registry.npmjs.org/get-value/-/get-value-2.0.6.tgz",
@@ -24639,6 +24828,15 @@
         "semver": "^6.0.0"
       }
     },
+    "map-age-cleaner": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/map-age-cleaner/-/map-age-cleaner-0.1.3.tgz",
+      "integrity": "sha512-bJzx6nMoP6PDLPBFmg7+xRKeFZvFboMrGlxmNj9ClvX53KrmvM5bXFXEWjbz4cz1AFn+jWJ9z/DJSz7hrs0w3w==",
+      "dev": true,
+      "requires": {
+        "p-defer": "^1.0.0"
+      }
+    },
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       "resolved": "https://registry.npmjs.org/map-cache/-/map-cache-0.2.2.tgz",
@@ -24891,6 +25089,17 @@
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       "dev": true
     },
+    "mem": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/mem/-/mem-4.3.0.tgz",
+      "integrity": "sha512-qX2bG48pTqYRVmDB37rn/6PT7LcR8T7oAX3bf99u1Tt1nzxYfxkgqDwUwolPlXweM0XzBOBFzSx4kfp7KP1s/w==",
+      "dev": true,
+      "requires": {
+        "map-age-cleaner": "^0.1.1",
+        "mimic-fn": "^2.0.0",
+        "p-is-promise": "^2.0.0"
+      }
+    },
     "memory-fs": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/memory-fs/-/memory-fs-0.4.1.tgz",
@@ -25093,6 +25302,12 @@
         "mime-db": "1.52.0"
       }
     },
+    "mimic-fn": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-2.1.0.tgz",
+      "integrity": "sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg==",
+      "dev": true
+    },
     "mimic-response": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-1.0.1.tgz",
@@ -25324,6 +25539,15 @@
         "lower-case": "^1.1.1"
       }
     },
+    "node-fetch": {
+      "version": "2.6.7",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.7.tgz",
+      "integrity": "sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==",
+      "dev": true,
+      "requires": {
+        "whatwg-url": "^5.0.0"
+      }
+    },
     "node-forge": {
       "version": "0.10.0",
       "resolved": "https://registry.npmjs.org/node-forge/-/node-forge-0.10.0.tgz",
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       "dev": true
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+    "p-defer": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/p-defer/-/p-defer-1.0.0.tgz",
+      "integrity": "sha512-wB3wfAxZpk2AzOfUMJNL+d36xothRSyj8EXOa4f6GMqYDN9BJaaSISbsk+wS9abmnebVw95C2Kb5t85UmpCxuw==",
+      "dev": true
+    },
     "p-finally": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/p-finally/-/p-finally-1.0.0.tgz",
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       "dev": true
     },
+    "p-is-promise": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/p-is-promise/-/p-is-promise-2.1.0.tgz",
+      "integrity": "sha512-Y3W0wlRPK8ZMRbNq97l4M5otioeA5lm1z7bkNkxCka8HSPjR0xRWmpCmc9utiaLP9Jb1eD8BgeIxTW4AIF45Pg==",
+      "dev": true
+    },
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       "dev": true
     },
+    "p-memoize": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/p-memoize/-/p-memoize-3.1.0.tgz",
+      "integrity": "sha512-e5tIvrsr7ydUUnxb534iQWtXxWgk/86IsH+H+nV4FHouIggBt4coXboKBt26o4lTu7JbEnGSeXdEsYR8BhAHFA==",
+      "dev": true,
+      "requires": {
+        "mem": "^4.3.0",
+        "mimic-fn": "^2.1.0"
+      }
+    },
+    "p-queue": {
+      "version": "6.6.2",
+      "resolved": "https://registry.npmjs.org/p-queue/-/p-queue-6.6.2.tgz",
+      "integrity": "sha512-RwFpb72c/BhQLEXIZ5K2e+AhgNVmIejGlTgiB9MzZ0e93GRvqZ7uSi0dvRF7/XIXDeNkra2fNHBxTyPDGySpjQ==",
+      "dev": true,
+      "requires": {
+        "eventemitter3": "^4.0.4",
+        "p-timeout": "^3.2.0"
+      }
+    },
     "p-retry": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/p-retry/-/p-retry-3.0.1.tgz",
@@ -25744,6 +26000,15 @@
         "retry": "^0.12.0"
       }
     },
+    "p-timeout": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/p-timeout/-/p-timeout-3.2.0.tgz",
+      "integrity": "sha512-rhIwUycgwwKcP9yTOOFK/AKsAopjjCakVqLHePO3CC6Mir1Z99xT+R63jZxAT5lFZLa2inS5h+ZS2GvR99/FBg==",
+      "dev": true,
+      "requires": {
+        "p-finally": "^1.0.0"
+      }
+    },
     "p-try": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
@@ -28896,6 +29161,34 @@
         "unist-util-filter": "^2.0.3"
       }
     },
+    "textlint-rule-no-dead-link": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/textlint-rule-no-dead-link/-/textlint-rule-no-dead-link-5.1.2.tgz",
+      "integrity": "sha512-TXJKXL5WU6dtSbRuNli91D0emY8hQTBP1VUSbq2Ka+zDMoE/vqkzsAyVl7V7YuiwW8URXfc98BzYHu4NDAdQLw==",
+      "dev": true,
+      "requires": {
+        "fs-extra": "^8.1.0",
+        "get-url-origin": "^1.0.1",
+        "minimatch": "^3.0.4",
+        "node-fetch": "^2.6.0",
+        "p-memoize": "^3.1.0",
+        "p-queue": "^6.2.0",
+        "textlint-rule-helper": "^2.2.2"
+      },
+      "dependencies": {
+        "fs-extra": {
+          "version": "8.1.0",
+          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-8.1.0.tgz",
+          "integrity": "sha512-yhlQgA6mnOJUKOsRUFsgJdQCvkKhcz8tlZG5HBQfReYZy46OwLcY+Zia0mtdHsOo9y/hP+CxMN0TU9QxoOtG4g==",
+          "dev": true,
+          "requires": {
+            "graceful-fs": "^4.2.0",
+            "jsonfile": "^4.0.0",
+            "universalify": "^0.1.0"
+          }
+        }
+      }
+    },
     "textlint-rule-no-start-duplicated-conjunction": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/textlint-rule-no-start-duplicated-conjunction/-/textlint-rule-no-start-duplicated-conjunction-2.0.2.tgz",
@@ -29108,6 +29401,12 @@
         "punycode": "^2.1.1"
       }
     },
+    "tr46": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
+      "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==",
+      "dev": true
+    },
     "traverse": {
       "version": "0.6.7",
       "resolved": "https://registry.npmjs.org/traverse/-/traverse-0.6.7.tgz",
@@ -30142,6 +30441,12 @@
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       "dev": true
     },
+    "webidl-conversions": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
+      "integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==",
+      "dev": true
+    },
     "webpack": {
       "version": "4.46.0",
       "resolved": "https://registry.npmjs.org/webpack/-/webpack-4.46.0.tgz",
@@ -30367,6 +30672,16 @@
       "integrity": "sha512-OqedPIGOfsDlo31UNwYbCFMSaO9m9G/0faIHj5/dZFDMFqPTcx6UwqyOy3COEaEOg/9VsGIpdqn62W5KhoKSpg==",
       "dev": true
     },
+    "whatwg-url": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
+      "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==",
+      "dev": true,
+      "requires": {
+        "tr46": "~0.0.3",
+        "webidl-conversions": "^3.0.0"
+      }
+    },
     "when": {
       "version": "3.6.4",
       "resolved": "https://registry.npmjs.org/when/-/when-3.6.4.tgz",
diff --git a/package.json b/package.json
index a9160bf..0f3609a 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "textlint": "^12.4.0",
     "textlint-filter-rule-comments": "^1.2.2",
     "textlint-rule-max-comma": "^2.0.2",
+    "textlint-rule-no-dead-link": "^5.1.2",
     "textlint-rule-no-start-duplicated-conjunction": "^2.0.2",
     "textlint-rule-no-todo": "^2.0.1",
     "vuepress": "^1.9.7",