diff --git a/example/yarn.lock b/example/yarn.lock
index 5697ed5..636103f 100644
--- a/example/yarn.lock
+++ b/example/yarn.lock
@@ -1248,9 +1248,9 @@ async-limiter@~1.0.0:
   integrity sha1-3TeelPDbgxCwgpH51kwyCXZmF/0=
 
 async@^2.1.4, async@^2.4.0:
-  version "2.6.3"
-  resolved "https://registry.npm.taobao.org/async/download/async-2.6.3.tgz#d72625e2344a3656e3a3ad4fa749fa83299d82ff"
-  integrity sha1-1yYl4jRKNlbjo61Pp0n6gymdgv8=
+  version "2.6.4"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.6.4.tgz#706b7ff6084664cd7eae713f6f965433b5504221"
+  integrity sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==
   dependencies:
     lodash "^4.17.14"
 
@@ -4422,9 +4422,9 @@ lodash.throttle@^4.1.1:
   integrity sha1-wj6RtxAkKscMN/HhzaknTMOb8vQ=
 
 lodash@^4.16.6, lodash@^4.17.14, lodash@^4.17.19, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.2.0, lodash@^4.3.0, lodash@^4.6.1:
-  version "4.17.20"
-  resolved "https://registry.npm.taobao.org/lodash/download/lodash-4.17.20.tgz?cache=0&sync_timestamp=1597336082988&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Flodash%2Fdownload%2Flodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
-  integrity sha1-tEqbYpe8tpjxxRo1RaKzs2jVnFI=
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 loose-envify@^1.0.0, loose-envify@^1.1.0, loose-envify@^1.3.1, loose-envify@^1.4.0:
   version "1.4.0"