diff --git a/yarn.lock b/yarn.lock
index a37771990..221f56f6b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3441,8 +3441,8 @@ postcss@^6.0.9:
     supports-color "^5.4.0"
 
 postcss@^7.0.11, postcss@^7.0.14, postcss@^7.0.16:
-  version "7.0.16"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.16.tgz#48f64f1b4b558cb8b52c88987724359acb010da2"
+  version "7.0.17"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.17.tgz#4da1bdff5322d4a0acaab4d87f3e782436bad31f"
   dependencies:
     chalk "^2.4.2"
     source-map "^0.6.1"