diff --git a/package.json b/package.json
index 1cca6884..ca22acdd 100644
--- a/package.json
+++ b/package.json
@@ -89,7 +89,7 @@
     "istanbul-instrumenter-loader": "3.0.1",
     "jquery": "3.3.1",
     "jquery-ui": "1.12.1",
-    "mini-css-extract-plugin": "0.4.0",
+    "mini-css-extract-plugin": "0.4.1",
     "mocha": "5.2.0",
     "mocha-loader": "1.1.3",
     "mocha-webpack": "2.0.0-beta.0",
diff --git a/yarn.lock b/yarn.lock
index 74abec27..e0ab0f2c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -243,6 +243,17 @@
     "@webassemblyjs/wast-parser" "1.5.12"
     long "^3.2.0"
 
+"@webpack-contrib/schema-utils@^1.0.0-beta.0":
+  version "1.0.0-beta.0"
+  resolved "https://registry.yarnpkg.com/@webpack-contrib/schema-utils/-/schema-utils-1.0.0-beta.0.tgz#bf9638c9464d177b48209e84209e23bee2eb4f65"
+  dependencies:
+    ajv "^6.1.0"
+    ajv-keywords "^3.1.0"
+    chalk "^2.3.2"
+    strip-ansi "^4.0.0"
+    text-table "^0.2.0"
+    webpack-log "^1.1.2"
+
 abbrev@1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.1.tgz#f8f2c887ad10bf67f634f005b6987fed3179aac8"
@@ -1443,7 +1454,7 @@ chai@4.1.2:
     pathval "^1.0.0"
     type-detect "^4.0.0"
 
-chalk@2.4.1, chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.0, chalk@^2.4.1:
+chalk@2.4.1, chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.0, chalk@^2.3.2, chalk@^2.4.1:
   version "2.4.1"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.1.tgz#18c49ab16a037b6eb0152cc83e3471338215b66e"
   dependencies:
@@ -4610,10 +4621,11 @@ mimic-response@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/mimic-response/-/mimic-response-1.0.0.tgz#df3d3652a73fded6b9b0b24146e6fd052353458e"
 
-mini-css-extract-plugin@0.4.0:
-  version "0.4.0"
-  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.4.0.tgz#ff3bf08bee96e618e177c16ca6131bfecef707f9"
+mini-css-extract-plugin@0.4.1:
+  version "0.4.1"
+  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.4.1.tgz#d2bcf77bb2596b8e4bd9257e43d3f9164c2e86cb"
   dependencies:
+    "@webpack-contrib/schema-utils" "^1.0.0-beta.0"
     loader-utils "^1.1.0"
     webpack-sources "^1.1.0"