diff --git a/package.json b/package.json
index 8358c99f..c9a51fea 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "highland": "2.13.4",
     "html-minifier": "4.0.0",
     "minimalcss": "0.8.2",
-    "mkdirp": "0.5.1",
+    "mkdirp": "0.5.5",
     "puppeteer": "^1.8.0",
     "serve-static": "1.14.1",
     "sourcemapped-stacktrace-node": "2.1.8"
diff --git a/yarn.lock b/yarn.lock
index 5342afe6..5b9f0beb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2558,6 +2558,10 @@ minimist@^1.1.1, minimist@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
 
+minimist@^1.2.5:
+  version "1.2.5"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.5.tgz#67d66014b66a6a8aaa0c083c5fd58df4e4e97602"
+
 minimist@~0.0.1:
   version "0.0.10"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.10.tgz#de3f98543dbf96082be48ad1a0c7cda836301dcf"
@@ -2588,6 +2592,12 @@ mkdirp@0.5.1, mkdirp@^0.5.0, mkdirp@^0.5.1:
   dependencies:
     minimist "0.0.8"
 
+mkdirp@0.5.5:
+  version "0.5.5"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.5.tgz#d91cefd62d1436ca0f41620e251288d420099def"
+  dependencies:
+    minimist "^1.2.5"
+
 ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"