diff --git a/example/wepy-wechat-demo/yarn.lock b/example/wepy-wechat-demo/yarn.lock
index 8eac1ac..2a5a893 100644
--- a/example/wepy-wechat-demo/yarn.lock
+++ b/example/wepy-wechat-demo/yarn.lock
@@ -2707,8 +2707,8 @@ lodash.templatesettings@^3.0.0:
     lodash.escape "^3.0.0"
 
 lodash@^4.0.0, lodash@^4.17.4, lodash@^4.3.0, lodash@~4.17.4:
-  version "4.17.19"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.19.tgz#e48ddedbe30b3321783c5b4301fbd353bc1e4a4b"
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 logalot@^2.0.0:
   version "2.1.0"