diff --git a/package.json b/package.json
index 32d5985..224e507 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "heimdalljs": "^0.3.2",
     "jscs": "^2.11.0",
     "jshint": "^2.13.0",
-    "mkdirp": "^0.5.1",
+    "mkdirp": "^1.0.4",
     "ora": "^3.4.0",
     "promise-map-series": "^0.2.2",
     "qunit": "^2.10.1",
diff --git a/yarn.lock b/yarn.lock
index 6ec9a27..0cedb24 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1727,6 +1727,11 @@ mkdirp@0.x.x, mkdirp@^0.5.0, mkdirp@^0.5.1:
   dependencies:
     minimist "0.0.8"
 
+mkdirp@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-1.0.4.tgz#3eb5ed62622756d79a5f0e2a221dfebad75c2f7e"
+  integrity sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==
+
 ms@0.7.1:
   version "0.7.1"
   resolved "https://registry.yarnpkg.com/ms/-/ms-0.7.1.tgz#9cd13c03adbff25b65effde7ce864ee952017098"