diff --git a/package.json b/package.json
index ad17cebf36..8386264261 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "invig": "0.0.22",
     "js-yaml": "3.6.0",
     "lodash": "4.17.21",
-    "mkdirp": "0.5.1",
+    "mkdirp": "1.0.4",
     "mocha": "5.2.0",
     "npm-run-all": "4.1.5",
     "rimraf": "3.0.2",
diff --git a/src/_util/util.js b/src/_util/util.js
index dde9700149..433401ecf1 100644
--- a/src/_util/util.js
+++ b/src/_util/util.js
@@ -302,11 +302,10 @@ class Util {
 
     buf += `{% codeblock lang:javascript %}${params.code}{% endcodeblock %}`
 
-    mkdirp(path.dirname(funcPath), function (err) {
-      if (err) {
-        throw new Error('Could not mkdir  for ' + funcPath + '. ' + err)
-      }
+    mkdirp(path.dirname(funcPath)).then(function () {
       fs.writeFile(funcPath, buf, 'utf-8', cb)
+    }, function (err) {
+      throw new Error('Could not mkdir  for ' + funcPath + '. ' + err)
     })
   }
 
@@ -457,12 +456,11 @@ class Util {
     const code = codez.join('\n')
 
     // Write to disk
-    mkdirp(testdir, function (err) {
-      if (err) {
-        throw new Error(err)
-      }
+    mkdirp(testdir).then(function () {
       debug('writing: ' + testpath)
       fs.writeFile(testpath, code, 'utf-8', cb)
+    }, function (err) {
+      throw new Error(err)
     })
   }
 
diff --git a/yarn.lock b/yarn.lock
index 8aa4c1f8cb..db39217063 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4689,6 +4689,11 @@ mkdirp@0.5.1, "mkdirp@>=0.5 0", mkdirp@^0.5.0, mkdirp@^0.5.1, 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==
+
 mocha@5.2.0:
   version "5.2.0"
   resolved "https://registry.yarnpkg.com/mocha/-/mocha-5.2.0.tgz#6d8ae508f59167f940f2b5b3c4a612ae50c90ae6"