diff --git a/package.json b/package.json
index 9b20f0e..8f40841 100644
--- a/package.json
+++ b/package.json
@@ -95,7 +95,7 @@
     "mocha": "^3.2.0",
     "pixrem": "^3.0.2",
     "pleeease-filters": "^3.0.1",
-    "postcss": "^5.2.16",
+    "postcss": "^7.0.36",
     "postcss-calc": "^5.3.1",
     "postcss-color-function": "^3.0.0",
     "postcss-custom-media": "^5.0.1",
diff --git a/yarn.lock b/yarn.lock
old mode 100755
new mode 100644
index 4adce06..e2bf4e9
--- a/yarn.lock
+++ b/yarn.lock
@@ -1879,7 +1879,7 @@ chalk@^1.0.0, chalk@^1.1.1, chalk@^1.1.3:
     strip-ansi "^3.0.0"
     supports-color "^2.0.0"
 
-chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.0, chalk@^2.4.0, chalk@^2.4.1:
+chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.0, chalk@^2.4.0, chalk@^2.4.1, chalk@^2.4.2:
   version "2.4.2"
   resolved "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz"
   integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
@@ -7962,6 +7962,15 @@ postcss@^6.0.1, postcss@^6.0.14:
     source-map "^0.6.1"
     supports-color "^5.4.0"
 
+postcss@^7.0.36:
+  version "7.0.36"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.36.tgz#056f8cffa939662a8f5905950c07d5285644dfcb"
+  integrity sha512-BebJSIUMwJHRH0HAQoxN4u1CN86glsrwsW0q7T+/m44eXOUAxSNdHRkNZPYz5vVUbg17hFgOQDE7fZk7li3pZw==
+  dependencies:
+    chalk "^2.4.2"
+    source-map "^0.6.1"
+    supports-color "^6.1.0"
+
 pre-commit@^1.2.2:
   version "1.2.2"
   resolved "https://registry.npmjs.org/pre-commit/-/pre-commit-1.2.2.tgz"
@@ -9658,6 +9667,13 @@ supports-color@^5.3.0, supports-color@^5.4.0:
   dependencies:
     has-flag "^3.0.0"
 
+supports-color@^6.1.0:
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-6.1.0.tgz#0764abc69c63d5ac842dd4867e8d025e880df8f3"
+  integrity sha512-qe1jfm1Mg7Nq/NSh6XE24gPXROEVsWHxC1LIx//XNlD9iw7YZQGjZNjYN7xGaEG6iKdA8EtNFW6R0gjnVXp+wQ==
+  dependencies:
+    has-flag "^3.0.0"
+
 svg-tags@^1.0.0:
   version "1.0.0"
   resolved "https://registry.npmjs.org/svg-tags/-/svg-tags-1.0.0.tgz"