diff --git a/package.json b/package.json
index 20678cd..fa5171d 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "lodash.camelcase": "^4.3.0",
     "lodash.trim": "^4.5.1",
     "object-assign": "^4.1.1",
-    "postcss": "^5.2.13"
+    "postcss": "^6.0.0"
   },
   "repository": {
     "type": "git",
diff --git a/yarn.lock b/yarn.lock
index 41b4467..c117b95 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2053,10 +2053,6 @@ jodid25519@^1.0.0:
   dependencies:
     jsbn "~0.1.0"
 
-js-base64@^2.1.9:
-  version "2.1.9"
-  resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.1.9.tgz#f0e80ae039a4bd654b5f281fc93f04a914a7fcce"
-
 js-tokens@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.1.tgz#08e9f132484a2c45a30907e9dc4d5567b7f114d7"
@@ -2628,12 +2624,11 @@ pluralize@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/pluralize/-/pluralize-1.2.1.tgz#d1a21483fd22bb41e58a12fa3421823140897c45"
 
-postcss@^5.2.13:
-  version "5.2.16"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-5.2.16.tgz#732b3100000f9ff8379a48a53839ed097376ad57"
+postcss@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.0.tgz#ef75a67e75fe2bfff53971045697202c018b2e81"
   dependencies:
     chalk "^1.1.3"
-    js-base64 "^2.1.9"
     source-map "^0.5.6"
     supports-color "^3.2.3"