diff --git a/package.json b/package.json
index 96c344137..5f4bedc4a 100644
--- a/package.json
+++ b/package.json
@@ -190,7 +190,7 @@
     "jsonlint": "1.6.3",
     "less": "3.12.2",
     "less-loader": "5.0.0",
-    "mini-css-extract-plugin": "0.8.2",
+    "mini-css-extract-plugin": "0.12.0",
     "mocha": "5.2.0",
     "mock-require": "3.0.3",
     "optimize-css-assets-webpack-plugin": "5.0.4",
diff --git a/yarn.lock b/yarn.lock
index 3d56197be..d397f43f4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6949,10 +6949,10 @@ mimic-fn@^1.0.0:
   resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-1.2.0.tgz#820c86a39334640e99516928bd03fca88057d022"
   integrity sha512-jf84uxzwiuiIVKiOLpfYk7N46TSy8ubTonmneY9vrpHNAnp0QBt2BxWV9dO3/j+BoVAb+a5G6YDPW3M5HOdMWQ==
 
-mini-css-extract-plugin@0.8.2:
-  version "0.8.2"
-  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.8.2.tgz#a875e169beb27c88af77dd962771c9eedc3da161"
-  integrity sha512-a3Y4of27Wz+mqK3qrcd3VhYz6cU0iW5x3Sgvqzbj+XmlrSizmvu8QQMl5oMYJjgHOC4iyt+w7l4umP+dQeW3bw==
+mini-css-extract-plugin@0.12.0:
+  version "0.12.0"
+  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.12.0.tgz#ddeb74fd6304ca9f99c1db74acc7d5b507705454"
+  integrity sha512-z6PQCe9rd1XUwZ8gMaEVwwRyZlrYy8Ba1gRjFP5HcV51HkXX+XlwZ+a1iAYTjSYwgNBXoNR7mhx79mDpOn5fdw==
   dependencies:
     loader-utils "^1.1.0"
     normalize-url "1.9.1"