diff --git a/yarn.lock b/yarn.lock
index a94491d..992d7f2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1034,6 +1034,14 @@ chalk@^2.0.1:
     escape-string-regexp "^1.0.5"
     supports-color "^4.0.0"
 
+chalk@^2.4.1:
+  version "2.4.1"
+  resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.1.tgz#18c49ab16a037b6eb0152cc83e3471338215b66e"
+  dependencies:
+    ansi-styles "^3.2.1"
+    escape-string-regexp "^1.0.5"
+    supports-color "^5.3.0"
+
 chardet@^0.4.0:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.4.2.tgz#b5473b33dc97c424e5d98dc87d55d4d8a29c8bf2"
@@ -3937,11 +3945,11 @@ postcss-convert-values@^2.3.4:
     postcss "^5.0.11"
     postcss-value-parser "^3.1.2"
 
-postcss-custom-media@^6.0.0:
-  version "6.0.0"
-  resolved "https://registry.yarnpkg.com/postcss-custom-media/-/postcss-custom-media-6.0.0.tgz#be532784110ecb295044fb5395a18006eb21a737"
+postcss-custom-media@^7.0.2:
+  version "7.0.2"
+  resolved "https://registry.yarnpkg.com/postcss-custom-media/-/postcss-custom-media-7.0.2.tgz#e55fcd3a5ffe0d42c1cf99fe4a716a24f5228248"
   dependencies:
-    postcss "^6.0.1"
+    postcss "^7.0.2"
 
 postcss-custom-properties@^7.0.0:
   version "7.0.0"
@@ -4320,6 +4328,14 @@ postcss@^6.0.6:
     source-map "^0.5.6"
     supports-color "^4.2.0"
 
+postcss@^7.0.2:
+  version "7.0.2"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.2.tgz#7b5a109de356804e27f95a960bef0e4d5bc9bb18"
+  dependencies:
+    chalk "^2.4.1"
+    source-map "^0.6.1"
+    supports-color "^5.4.0"
+
 prelude-ls@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
@@ -5198,6 +5214,12 @@ supports-color@^5.0.0, supports-color@^5.3.0:
   dependencies:
     has-flag "^3.0.0"
 
+supports-color@^5.4.0:
+  version "5.5.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"
+  dependencies:
+    has-flag "^3.0.0"
+
 svgo@^0.7.0:
   version "0.7.2"
   resolved "https://registry.yarnpkg.com/svgo/-/svgo-0.7.2.tgz#9f5772413952135c6fefbf40afe6a4faa88b4bb5"