diff --git a/package.json b/package.json
index 9acd7a0c8..7ea683366 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,8 @@
 {
   "devDependencies": {
-    "vuepress": "^1.8.2"
+    "vuepress": "^1.8.2",
+    "glob-parent": "^5.1.2",
+    "normalize-url": "^4.5.1"
   },
   "scripts": {
     "docs:dev": "vuepress dev docs",
diff --git a/yarn.lock b/yarn.lock
index e511ef170..d06c28185 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3642,7 +3642,7 @@ glob-parent@^3.1.0:
     is-glob "^3.1.0"
     path-dirname "^1.0.0"
 
-glob-parent@~5.1.0:
+glob-parent@^5.1.2, glob-parent@~5.1.0:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/glob-parent/-/glob-parent-5.1.2.tgz#869832c58034fe68a4093c17dc15e8340d8401c4"
   integrity sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==
@@ -5254,6 +5254,11 @@ normalize-url@^4.1.0:
   resolved "https://registry.yarnpkg.com/normalize-url/-/normalize-url-4.5.0.tgz#453354087e6ca96957bd8f5baf753f5982142129"
   integrity sha512-2s47yzUxdexf1OhyRi4Em83iQk0aPvwTddtFz4hnSSw9dCEsLEGf6SwIO8ss/19S9iBb5sJaOuTvTGDeZI00BQ==
 
+normalize-url@^4.5.1:
+  version "4.5.1"
+  resolved "https://registry.yarnpkg.com/normalize-url/-/normalize-url-4.5.1.tgz#0dd90cf1288ee1d1313b87081c9a5932ee48518a"
+  integrity sha512-9UZCFRHQdNrfTpGg8+1INIg93B6zE0aXMVFkw1WFwvO4SlZywU6aLg5Of0Ap/PgcbSw4LNxvMWXMeugwMCX0AA==
+
 npm-run-path@^2.0.0:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/npm-run-path/-/npm-run-path-2.0.2.tgz#35a9232dfa35d7067b4cb2ddf2357b1871536c5f"