diff --git a/yarn.lock b/yarn.lock
index 98c0c93dd..28ba22937 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3875,9 +3875,9 @@ postcss@^6.0.9:
     supports-color "^5.4.0"
 
 postcss@^7.0.11, postcss@^7.0.14, postcss@^7.0.18:
-  version "7.0.18"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.18.tgz#4b9cda95ae6c069c67a4d933029eddd4838ac233"
-  integrity sha512-/7g1QXXgegpF+9GJj4iN7ChGF40sYuGYJ8WZu8DZWnmhQ/G36hfdk3q9LBJmoK+lZ+yzZ5KYpOoxq7LF1BxE8g==
+  version "7.0.20"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.20.tgz#a107b68ef1ad1c5e6e214ebb3c5ede2799322837"
+  integrity sha512-VOdO3a5nHVftPSEbG1zaG320b4mH5KAflH+pIeVAF5/hlw6YumELSgHZQBekjg29Oj4qw7XAyp9tIEBpeNWcyg==
   dependencies:
     chalk "^2.4.2"
     source-map "^0.6.1"