diff --git a/yarn.lock b/yarn.lock
index 9de0e0493..f4b80c22d 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, postcss@^7.0.19:
-  version "7.0.20"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.20.tgz#a107b68ef1ad1c5e6e214ebb3c5ede2799322837"
-  integrity sha512-VOdO3a5nHVftPSEbG1zaG320b4mH5KAflH+pIeVAF5/hlw6YumELSgHZQBekjg29Oj4qw7XAyp9tIEBpeNWcyg==
+  version "7.0.21"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.21.tgz#06bb07824c19c2021c5d056d5b10c35b989f7e17"
+  integrity sha512-uIFtJElxJo29QC753JzhidoAhvp/e/Exezkdhfmt8AymWT6/5B7W1WmponYWkHk2eg6sONyTch0A3nkMPun3SQ==
   dependencies:
     chalk "^2.4.2"
     source-map "^0.6.1"