diff --git a/package-lock.json b/package-lock.json
index baf943d..3192dc7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -58,7 +58,6 @@
         "fs-readdir-recursive": "^1.1.0",
         "glob": "^7.0.0",
         "lodash": "^4.17.10",
-        "mkdirp": "^0.5.1",
         "output-file-sync": "^2.0.0",
         "slash": "^2.0.0",
         "source-map": "^0.5.0"
@@ -77,8 +76,7 @@
           "dev": true,
           "requires": {
             "graceful-fs": "^4.1.11",
-            "is-plain-obj": "^1.1.0",
-            "mkdirp": "^0.5.1"
+            "is-plain-obj": "^1.1.0"
           }
         },
         "slash": {
@@ -1001,7 +999,6 @@
         "find-cache-dir": "^1.0.0",
         "home-or-tmp": "^3.0.0",
         "lodash": "^4.17.10",
-        "mkdirp": "^0.5.1",
         "pirates": "^4.0.0",
         "source-map-support": "^0.5.9"
       }
@@ -3174,7 +3171,6 @@
         "levn": "^0.3.0",
         "lodash": "^4.17.5",
         "minimatch": "^3.0.4",
-        "mkdirp": "^0.5.1",
         "natural-compare": "^1.4.0",
         "optionator": "^0.8.2",
         "path-is-inside": "^1.0.2",
@@ -4370,7 +4366,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -4785,7 +4782,8 @@
         "safe-buffer": {
           "version": "5.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -4841,6 +4839,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -4884,12 +4883,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -6439,12 +6440,6 @@
         "brace-expansion": "^1.1.7"
       }
     },
-    "minimist": {
-      "version": "0.0.8",
-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
-      "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
-      "dev": true
-    },
     "minimist-options": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/minimist-options/-/minimist-options-3.0.2.tgz",
@@ -6477,13 +6472,10 @@
       }
     },
     "mkdirp": {
-      "version": "0.5.1",
-      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
-      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
-      "dev": true,
-      "requires": {
-        "minimist": "0.0.8"
-      }
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.2.tgz",
+      "integrity": "sha512-N2REVrJ/X/jGPfit2d7zea2J1pf7EAR5chIUcfHffAZ7gmlam5U65sAm76+o4ntQbSRdTjYf7qZz3chuHlwXEA==",
+      "dev": true
     },
     "ms": {
       "version": "2.1.1",
@@ -10722,7 +10714,6 @@
       "integrity": "sha1-bc6VsmgcoAPuv7MEpBX5y6vMU4U=",
       "dev": true,
       "requires": {
-        "mkdirp": "^0.5.1",
         "os-tmpdir": "^1.0.1",
         "uid2": "0.0.3"
       }
@@ -11063,10 +11054,7 @@
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/write/-/write-0.2.1.tgz",
       "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
-      "dev": true,
-      "requires": {
-        "mkdirp": "^0.5.1"
-      }
+      "dev": true
     },
     "write-file-atomic": {
       "version": "2.3.0",
diff --git a/package.json b/package.json
index 6f141fa..c8b8f5b 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "flag-icon-css": "^3.2.1",
     "flow-bin": "^0.77.0",
     "flow-copy-source": "^2.0.2",
-    "mkdirp": "^0.5.1",
+    "mkdirp": "^1.0.0",
     "nyc": "^13.1.0",
     "postcss-at-rules-variables": "^0.1.6",
     "postcss-cli": "^6.1.1",