diff --git a/tasks/package.json b/tasks/package.json
index 1a3d6359a..75d6e18b3 100644
--- a/tasks/package.json
+++ b/tasks/package.json
@@ -39,7 +39,7 @@
     "browserify": "16.2.3",
     "cached-path-relative": "1.0.2",
     "chalk": "2.4.2",
-    "css-extract": "1.3.1",
+    "css-extract": "2.0.0",
     "event-stream": "4.0.1",
     "express": "4.16.4",
     "fancy-log": "1.3.3",
diff --git a/yarn.lock b/yarn.lock
index ed41af8a7..0454f95aa 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2446,6 +2446,11 @@ base64-js@^1.0.2:
   resolved "https://registry.yarnpkg.com/base64-js/-/base64-js-1.3.1.tgz#58ece8cb75dd07e71ed08c736abc5fac4dbf8df1"
   integrity sha512-mLQ4i2QO1ytvGWFWmcngKO//JXAQueZvwEKtjgQFM4jIK0kU+ytMfplL8j+n5mspOfjHwoAg+9yhb7BwAHm36g==
 
+base64-js@^1.3.1:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/base64-js/-/base64-js-1.5.1.tgz#1b1b440160a5bf7ad40b650f095963481903930a"
+  integrity sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==
+
 base@^0.11.1:
   version "0.11.2"
   resolved "https://registry.yarnpkg.com/base/-/base-0.11.2.tgz#7bde5ced145b6d551a90db87f83c558b4eb48a8f"
@@ -2493,7 +2498,7 @@ bindings@^1.5.0:
   dependencies:
     file-uri-to-path "1.0.0"
 
-bl@^1.1.2, bl@^1.2.1:
+bl@^1.2.1:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/bl/-/bl-1.2.3.tgz#1e8dd80142eac80d7158c9dccc047fb620e035e7"
   integrity sha512-pvcNpa0UU69UT341rO6AYy4FVAIkUHuZXRIWbq+zHnsVcRzDDjIAhGuuYoi0d//cwIwtt4pkpKycWEfjdV+vww==
@@ -2501,6 +2506,15 @@ bl@^1.1.2, bl@^1.2.1:
     readable-stream "^2.3.5"
     safe-buffer "^5.1.1"
 
+bl@^4.0.2:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/bl/-/bl-4.1.0.tgz#451535264182bec2fbbc83a62ab98cf11d9f7b3a"
+  integrity sha512-1W07cM9gS6DcLperZfFSj+bWLtaPGSOHWhPiGzXmvVJbRLdG82sH/Kn8EtW1VqWVA54AKf2h5k5BbnIbwF3h6w==
+  dependencies:
+    buffer "^5.5.0"
+    inherits "^2.0.4"
+    readable-stream "^3.4.0"
+
 bluebird@^3.0, bluebird@^3.5.1, bluebird@^3.5.3, bluebird@^3.5.5:
   version "3.7.2"
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.2.tgz#9f229c15be272454ffa973ace0dbee79a1b0c36f"
@@ -2837,6 +2851,14 @@ buffer@^5.0.2:
     base64-js "^1.0.2"
     ieee754 "^1.1.4"
 
+buffer@^5.5.0:
+  version "5.7.1"
+  resolved "https://registry.yarnpkg.com/buffer/-/buffer-5.7.1.tgz#ba62e7c13133053582197160851a8f648e99eed0"
+  integrity sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==
+  dependencies:
+    base64-js "^1.3.1"
+    ieee754 "^1.1.13"
+
 buffer@~5.2.1:
   version "5.2.1"
   resolved "https://registry.yarnpkg.com/buffer/-/buffer-5.2.1.tgz#dd57fa0f109ac59c602479044dca7b8b3d0b71d6"
@@ -3641,16 +3663,16 @@ css-blank-pseudo@^0.1.4:
   dependencies:
     postcss "^7.0.5"
 
-css-extract@1.3.1:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/css-extract/-/css-extract-1.3.1.tgz#e73e470715ebcbf1774642fc53f260a1df30161a"
-  integrity sha512-UitOFSHpqBqzGjwgzIVsj9ocXijqE4NPSpjgvH7rbzSKEOdgp8HEEj82rewLTSVI4HTp2DqReBlRNNONR43aag==
+css-extract@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/css-extract/-/css-extract-2.0.0.tgz#8e9769a95e0dac8ddfc052cfe899c569e4aa17fe"
+  integrity sha512-foKNaeU6/6xJRRQx0qyXVndANsM2MT6y9O+hmF3lcnqkVO7awaDDj/hPQWdFlEMF0hPkLIDWPEWtV8S4Ep2Y9g==
   dependencies:
-    bl "^1.1.2"
+    bl "^4.0.2"
     defined "^1.0.0"
     from2-string "^1.1.0"
     static-module "^3.0.0"
-    through2 "^2.0.1"
+    through2 "^4.0.2"
 
 css-has-pseudo@^0.10.0:
   version "0.10.0"
@@ -6191,6 +6213,11 @@ icss-replace-symbols@1.1.0, icss-replace-symbols@^1.1.0:
   resolved "https://registry.yarnpkg.com/icss-replace-symbols/-/icss-replace-symbols-1.1.0.tgz#06ea6f83679a7749e386cfe1fe812ae5db223ded"
   integrity sha1-Bupvg2ead0njhs/h/oEq5dsiPe0=
 
+ieee754@^1.1.13:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.2.1.tgz#8eb7a10a63fff25d15a57b001586d177d1b0d352"
+  integrity sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA==
+
 ieee754@^1.1.4:
   version "1.1.13"
   resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.13.tgz#ec168558e95aa181fd87d37f55c32bbcb6708b84"
@@ -10099,7 +10126,7 @@ readable-stream@1.x, readable-stream@~1.1.9:
     isarray "0.0.1"
     string_decoder "~0.10.x"
 
-"readable-stream@2 || 3", readable-stream@^3.0.2, readable-stream@^3.6.0:
+"readable-stream@2 || 3", readable-stream@3, readable-stream@^3.0.2, readable-stream@^3.4.0, readable-stream@^3.6.0:
   version "3.6.0"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.6.0.tgz#337bbda3adc0706bd3e024426a286d4b4b2c9198"
   integrity sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==
@@ -11533,6 +11560,13 @@ through2@^3.0.0:
     inherits "^2.0.4"
     readable-stream "2 || 3"
 
+through2@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/through2/-/through2-4.0.2.tgz#a7ce3ac2a7a8b0b966c80e7c49f0484c3b239764"
+  integrity sha512-iOqSav00cVxEEICeD7TjLB1sueEL+81Wpzp2bY17uZjZN0pWZPuo4suZ/61VujxmqSGFfgOcNuTZ85QJwNZQpw==
+  dependencies:
+    readable-stream "3"
+
 through@2, "through@>=2.2.7 <3", through@^2.3.4, through@^2.3.6, through@^2.3.8, through@~2.3, through@~2.3.4:
   version "2.3.8"
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"