diff --git a/lib/core/package.json b/lib/core/package.json
index 2787353a8ab1..9ee81889460b 100644
--- a/lib/core/package.json
+++ b/lib/core/package.json
@@ -34,7 +34,7 @@
     "global": "^4.3.2",
     "json-loader": "^0.5.7",
     "postcss-flexbugs-fixes": "^3.2.0",
-    "postcss-loader": "^2.1.1",
+    "postcss-loader": "^2.1.2",
     "prop-types": "^15.6.1",
     "qs": "^6.5.1",
     "react": "^16.0.0",
diff --git a/yarn.lock b/yarn.lock
index 2a492ea4a6a7..06c00ccb5716 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -12002,9 +12002,9 @@ postcss-loader@^2.0.10:
     postcss-load-config "^1.2.0"
     schema-utils "^0.3.0"
 
-postcss-loader@^2.1.1:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-2.1.1.tgz#208935af3b1d65e1abb1a870a912dd12e7b36895"
+postcss-loader@^2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-2.1.2.tgz#03f54e23be736c9ea4f610e17d2a299254c05130"
   dependencies:
     loader-utils "^1.1.0"
     postcss "^6.0.0"