diff --git a/fixtures/packaging/systemjs-builder/prod/yarn.lock b/fixtures/packaging/systemjs-builder/prod/yarn.lock
index 21b559da0043..881b61526819 100644
--- a/fixtures/packaging/systemjs-builder/prod/yarn.lock
+++ b/fixtures/packaging/systemjs-builder/prod/yarn.lock
@@ -399,8 +399,8 @@ lazy-cache@^1.0.3:
   resolved "https://registry.yarnpkg.com/lazy-cache/-/lazy-cache-1.0.4.tgz#a1d78fc3a50474cb80845d3b3b6e1da49a446e8e"
 
 lodash@^4.17.4:
-  version "4.17.21"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  version "4.18.1"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.18.1.tgz#ff2b66c1f6326d59513de2407bf881439812771c"
 
 longest@^1.0.1:
   version "1.0.1"