diff --git a/yarn.lock b/yarn.lock
index 6d9376d..37a8267 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1741,7 +1741,7 @@ chalk@^1.1.1:
     strip-ansi "^3.0.0"
     supports-color "^2.0.0"
 
-chalk@^2.0.0, chalk@^2.4.2:
+chalk@^2.0.0:
   version "2.4.2"
   resolved "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz"
   integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
@@ -4541,6 +4541,11 @@ performance-now@^2.1.0:
   version "2.1.0"
   resolved "https://registry.npmjs.org/performance-now/-/performance-now-2.1.0.tgz"
 
+picocolors@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/picocolors/-/picocolors-0.2.1.tgz#570670f793646851d1ba135996962abad587859f"
+  integrity sha512-cMlDqaLEqfSaW8Z7N5Jw+lyIW869EzT73/F5lhtY9cLGoVxSXznfgfXMO0Z5K0o0Q2TkTXq+0KFsdnSe3jDViA==
+
 pify@^2.0.0:
   version "2.3.0"
   resolved "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz"
@@ -4636,12 +4641,12 @@ postcss-value-parser@^3.3.1:
   resolved "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-3.3.1.tgz"
 
 postcss@^7.0.14, postcss@^7.0.5, postcss@^7.0.6:
-  version "7.0.14"
-  resolved "https://registry.npmjs.org/postcss/-/postcss-7.0.14.tgz"
+  version "7.0.39"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.39.tgz#9624375d965630e2e1f2c02a935c82a59cb48309"
+  integrity sha512-yioayjNbHn6z1/Bywyb2Y4s3yvDAeXGOyxqD+LnVOinq6Mdmd++SW2wUNVzavyyHxd6+DxzWGIuosg6P1Rj8uA==
   dependencies:
-    chalk "^2.4.2"
+    picocolors "^0.2.1"
     source-map "^0.6.1"
-    supports-color "^6.1.0"
 
 prettier@^1.16.4:
   version "1.16.4"
@@ -5459,17 +5464,14 @@ source-map@^0.4.2:
   dependencies:
     amdefine ">=0.0.4"
 
-source-map@^0.5.0:
+source-map@^0.5.0, source-map@^0.5.6:
   version "0.5.7"
   resolved "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz"
 
-source-map@^0.5.6:
-  version "0.5.6"
-  resolved "https://registry.npmjs.org/source-map/-/source-map-0.5.6.tgz"
-
 source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.0, source-map@~0.6.1:
   version "0.6.1"
-  resolved "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
+  integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
 
 source-map@~0.7.2:
   version "0.7.3"