diff --git a/package.json b/package.json
index c21bc7e..44dd0fc 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,7 @@
   "license": "MIT",
   "dependencies": {
     "globby": "^3.0.1",
+    "mkdirp": "^0.5.1",
     "neo-async": "^1.0.0",
     "postcss": "^5.0.0",
     "read-file-stdin": "^0.2.0",
@@ -33,4 +34,4 @@
     "postcss-import": "^7.1.0",
     "postcss-url": "^4.0.0"
   }
-}
\ No newline at end of file
+}