diff --git a/example/yarn.lock b/example/yarn.lock
index e673ba55..2e32d8db 100644
--- a/example/yarn.lock
+++ b/example/yarn.lock
@@ -6508,6 +6508,11 @@ performance-now@^2.1.0:
   resolved "https://registry.npm.taobao.org/performance-now/download/performance-now-2.1.0.tgz#6309f4e0e5fa913ec1c69307ae364b4b377c9e7b"
   integrity sha1-Ywn04OX6kT7BxpMHrjZLSzd8nns=
 
+picocolors@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/picocolors/-/picocolors-0.2.1.tgz#570670f793646851d1ba135996962abad587859f"
+  integrity sha512-cMlDqaLEqfSaW8Z7N5Jw+lyIW869EzT73/F5lhtY9cLGoVxSXznfgfXMO0Z5K0o0Q2TkTXq+0KFsdnSe3jDViA==
+
 picomatch@^2.0.5:
   version "2.2.1"
   resolved "https://registry.npm.taobao.org/picomatch/download/picomatch-2.2.1.tgz#21bac888b6ed8601f831ce7816e335bc779f0a4a"
@@ -6923,23 +6928,13 @@ postcss-value-parser@^4.1.0:
   resolved "https://registry.npm.taobao.org/postcss-value-parser/download/postcss-value-parser-4.1.0.tgz#443f6a20ced6481a2bda4fa8532a6e55d789a2cb"
   integrity sha1-RD9qIM7WSBor2k+oUypuVdeJoss=
 
-postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.14, postcss@^7.0.16, postcss@^7.0.23, postcss@^7.0.5, postcss@^7.0.6:
-  version "7.0.26"
-  resolved "https://registry.npm.taobao.org/postcss/download/postcss-7.0.26.tgz?cache=0&sync_timestamp=1577751206655&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fpostcss%2Fdownload%2Fpostcss-7.0.26.tgz#5ed615cfcab35ba9bbb82414a4fa88ea10429587"
-  integrity sha1-XtYVz8qzW6m7uCQUpPqI6hBClYc=
+postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.14, postcss@^7.0.16, postcss@^7.0.23, postcss@^7.0.32, postcss@^7.0.5, postcss@^7.0.6:
+  version "7.0.39"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.39.tgz#9624375d965630e2e1f2c02a935c82a59cb48309"
+  integrity sha512-yioayjNbHn6z1/Bywyb2Y4s3yvDAeXGOyxqD+LnVOinq6Mdmd++SW2wUNVzavyyHxd6+DxzWGIuosg6P1Rj8uA==
   dependencies:
-    chalk "^2.4.2"
+    picocolors "^0.2.1"
     source-map "^0.6.1"
-    supports-color "^6.1.0"
-
-postcss@^7.0.32:
-  version "7.0.32"
-  resolved "https://registry.npm.taobao.org/postcss/download/postcss-7.0.32.tgz#4310d6ee347053da3433db2be492883d62cec59d"
-  integrity sha1-QxDW7jRwU9o0M9sr5JKIPWLOxZ0=
-  dependencies:
-    chalk "^2.4.2"
-    source-map "^0.6.1"
-    supports-color "^6.1.0"
 
 prelude-ls@~1.1.2:
   version "1.1.2"
@@ -7860,8 +7855,8 @@ source-map@^0.5.0, source-map@^0.5.6:
 
 source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.0, source-map@~0.6.1:
   version "0.6.1"
-  resolved "https://registry.npm.taobao.org/source-map/download/source-map-0.6.1.tgz?cache=0&sync_timestamp=1571657176668&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fsource-map%2Fdownload%2Fsource-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
-  integrity sha1-dHIq8y6WFOnCh6jQu95IteLxomM=
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
+  integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
 
 spdx-correct@^3.0.0:
   version "3.1.0"