diff --git a/7-advanced/7.4-log/yarn.lock b/7-advanced/7.4-log/yarn.lock
index 4af0bc6..79195b8 100644
--- a/7-advanced/7.4-log/yarn.lock
+++ b/7-advanced/7.4-log/yarn.lock
@@ -2158,8 +2158,8 @@ lodash.words@^3.0.0:
     lodash._root "^3.0.0"
 
 lodash@^4.17.2, lodash@^4.2.0:
-  version "4.17.4"
-  resolved "http://registry.npm.taobao.org/lodash/download/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 longest@^1.0.1:
   version "1.0.1"