diff --git a/user/themes/quark/yarn.lock b/user/themes/quark/yarn.lock
index 4169d96a..9ad50ef9 100644
--- a/user/themes/quark/yarn.lock
+++ b/user/themes/quark/yarn.lock
@@ -327,11 +327,11 @@ class-utils@^0.3.5:
     isobject "^3.0.0"
     static-extend "^0.1.1"
 
-clean-css@4.1.11:
-  version "4.1.11"
-  resolved "https://registry.yarnpkg.com/clean-css/-/clean-css-4.1.11.tgz#2ecdf145aba38f54740f26cefd0ff3e03e125d6a"
+clean-css@4.2.1:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/clean-css/-/clean-css-4.2.1.tgz#2d411ef76b8569b6d0c84068dabe85b0aa5e5c17"
   dependencies:
-    source-map "0.5.x"
+    source-map "~0.6.0"
 
 cliui@^3.2.0:
   version "3.2.0"
@@ -513,8 +513,8 @@ decamelize@^1.1.1, decamelize@^1.1.2:
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
 
 decode-uri-component@^0.2.0:
-  version "0.2.0"
-  resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.0.tgz#eb3913333458775cb84cd1a1fae062106bb87545"
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.2.tgz#e69dbe25d37941171dd540e024c444cd5188e1e9"
 
 defaults@^1.0.0:
   version "1.0.3"
@@ -990,11 +990,11 @@ gulp-autoprefixer@latest:
     through2 "^2.0.0"
     vinyl-sourcemaps-apply "^0.2.0"
 
-gulp-clean-css@^3.9.4:
-  version "3.9.4"
-  resolved "https://registry.yarnpkg.com/gulp-clean-css/-/gulp-clean-css-3.9.4.tgz#c6d3f8bb7a600fbe661962a72348a330954d343b"
+gulp-clean-css@^3.9.3:
+  version "3.10.0"
+  resolved "https://registry.yarnpkg.com/gulp-clean-css/-/gulp-clean-css-3.10.0.tgz#bccd4605eff104bfa4980014cc4b3c24c571736d"
   dependencies:
-    clean-css "4.1.11"
+    clean-css "4.2.1"
     plugin-error "1.0.1"
     through2 "2.0.3"
     vinyl-sourcemaps-apply "0.2.1"
@@ -2406,10 +2406,6 @@ source-map-url@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/source-map-url/-/source-map-url-0.4.0.tgz#3e935d7ddd73631b97659956d55128e87b5084a3"
 
-source-map@0.5.x, source-map@^0.5.1, source-map@^0.5.6:
-  version "0.5.7"
-  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
-
 source-map@^0.1.38:
   version "0.1.43"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.1.43.tgz#c24bc146ca517c1471f5dacbe2571b2b7f9e3346"
@@ -2422,6 +2418,10 @@ source-map@^0.4.2:
   dependencies:
     amdefine ">=0.0.4"
 
+source-map@^0.5.1, source-map@^0.5.6:
+  version "0.5.7"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
+
 source-map@^0.6.1, source-map@~0.6.0:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"